SLAB · Silicon Laboratories Inc.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. The RSUs will vest completely on the earlier of (i) the first (1st) anniversary of the date of grant, and (ii) the date one day prior to the Annual Meeting of Stockholders in the year following the grant date.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.

Price represents the weighted average selling price. Prices range between $140 and $142.59.

Not applicable per instruction 4(c)(iii).

Price represents the weighted average selling price. Prices range between $140 and $140.62.

Not applicable per instruction 4(c)(iii).

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Not applicable per instruction 4(c)(iii).

Price represents the weighted average selling price. Prices range between $145.13 and $145.36.

Not applicable per instruction 4(c)(iii).

Not applicable per instruction 4(c)(iii).

Not applicable per instruction 4(c)(iii).

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.

Shares sold pursuant to Reporting Person's 10b5-1 Trading Plan.

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Represents shares withheld to pay taxes upon the vesting of a previously reported equity award.

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).

Reflects the grant of restricted stock units (RSUs) that will entitle Reporting Person to receive one (1) share of common stock per RSU. One-third of the RSUs will vest on each of the first three anniversaries of the date of grant, and will be settled pursuant to the terms of the Issuer's 2009 Stock Incentive Plan (as amended from time to time).