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Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vests equally over a 3-year period, on each anniversary of the grant date, such that the option will fully vest on January 4, 2024.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2022, the reporting person was granted 169,683 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 120% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 4, 2021, the reporting person was granted 116,666 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 155% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested equally over a 3-year period, on each anniversary of the grant date, such that the option was fully vested on May 21, 2023.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 4, 2021, the reporting person was granted 16,333 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 155% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vests equally over a 3-year period, on each anniversary of the grant date, such that the option would be fully vested on January 4, 2024.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested equally over a 3-year period, on each anniversary of the grant date, such that the option was fully vested on January 9, 2023.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2023, the reporting person was granted 118,389 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 109% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2022, the reporting person was granted 28,280 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 120% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested according to the the following vesting schedule: 33.3% of the shares vested on the first anniversary of the grant date and approximately 16.7% vested at the end of each six (6) month period thereafter, such that the option was fully vested on December 31, 2020.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vests equally over a 3-year period, on each anniversary of the grant date, such that the option would fully vest on January 3, 2026.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested according to the the following vesting schedule: 33.3% of the shares vested on the first anniversary of the grant date and approximately 16.7% vested at the end of each six (6) month period thereafter, such that the option was fully vested on July 1, 2020.

Each cash-settled restricted stock unit of the Issuer that vests solely on the basis of time ("Cash-Settled RSU") is the economic equivalent of one share of Common Stock.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these Cash-Settled RSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares of Common Stock underlying such Cash-Settled RSU multiplied by (ii) $26.00 (less any required tax withholdings).

These Cash-Settled RSUs were scheduled to vest and be cash settled equally over a three-year period on each anniversary date of the respective grant date, and had no expiration date.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested equally over a 3-year period, on each anniversary of the grant date, such that the option was fully vested on May 21, 2023.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

The reporting person is the managing partner of the limited liability company that owns the reported securities.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Each cash-settled restricted stock unit of the Issuer that vests solely on the basis of time ("Cash-Settled RSU") is the economic equivalent of one share of Common Stock.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these Cash-Settled RSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares of Common Stock underlying such Cash-Settled RSU multiplied by (ii) $26.00 (less any required tax withholdings).

These Cash-Settled RSUs were scheduled to vest and be cash settled equally over a three-year period on each anniversary date of the respective grant date, and had no expiration date.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2022, the reporting person was granted 31,702 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 120% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vests equally over a 3-year period, on each anniversary of the grant date, such that the option would fully vest on January 3, 2025.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2023, the reporting person was granted 8,477 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 109% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 4, 2021, the reporting person was granted 23,333 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 155% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time") these shares of the Issuer's common stock ("Common Stock") were canceled and automatically converted into the right to receive $26.00 in cash, without interest thereon.

Represents shares held by the spouse of the reporting person.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested equally over a 3-year period, on each anniversary of the grant date, such that the option was fully vested on April 27, 2023.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2023, the reporting person was granted 19,731 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 109% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vests equally over a 3-year period, on each anniversary of the grant date, such that the option would fully vest on January 4, 2024.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

On January 3, 2023, the reporting person was granted 22,908 performance-based restricted stock units ("PSUs"), which were eligible to vest from 0% to 200% at the end of a three-year performance period based on the Issuer's satisfaction of certain performance criteria. Pursuant to the terms of the Merger Agreement, these PSUs vested prior to the Effective Time at 109% of the target level of performance based on the Company's EBITDA and relative total shareholder return measured over the applicable performance period, as adjusted for the Merger.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these options to purchase shares of Common Stock ("Stock Options") automatically vested (if unvested) and were canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the excess, if any, of $26.00 over the per-share exercise price for such Stock Option multiplied by (ii) the total number of shares of Common Stock underlying such Stock Option, subject to any required tax withholding in accordance with the terms of the Merger Agreement.

The option vested equally over a 3-year period, on each anniversary of the grant date, such that the option was fully vested on January 30, 2023.

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the effective time of the Merger (the "Effective Time"), these shares of the Issuer's common stock ("Common Stock") and restricted stock units of the Issuer that vest solely on the basis of time ("RSUs") were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the reported number of shares multiplied by (ii) $26.00 (less any required tax withholdings).

Pursuant to the Agreement and Plan of Merger, dated as of September 9, 2023 (as may be amended from time to time, the "Merger Agreement") by and among the Issuer, Aretec Group, Inc., a Delaware corporation ("Parent"), and C2023 Sub Corp., a Delaware corporation and a wholly-owned subsidiary of Parent ("Acquisition Sub"), effective November 27, 2023, among other things, Acquisition Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving as a wholly-owned subsidiary of Parent.

Pursuant to the terms of the Merger Agreement, at the Effective Time, these PSUs were automatically canceled and converted into the right to receive an amount in cash, without interest, equal to the product of (i) the number of shares of Common Stock underlying such PSU multiplied by (ii) $26.00 (less any required tax withholdings).

This transaction represents the withholding by the Issuer of shares to pay taxes in connection with the vesting of restricted stock units ("RSUs"). The timing and amount of the transaction were determined by the terms of the applicable RSU award and were not within the control of the reporting person.