EBC · Eastern Bankshares, Inc.

Sale of shares executed on July 6, 2026 pursuant to Reporting Person's 10b5-1 plan.

Represents the average sale price. The actual sale prices range from $22.56 to $22.84 per share. The reporting person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request.

Consists of (i) 4,172 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock that vest on the anniversary of the May 18, 2026 date of grant.

Sale of shares executed on June 29, 2026 pursuant to Reporting Person's 10b5-1 plan.

Consists of (i) 5,882 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock that vest on the anniversary of the May 18, 2026 date of grant.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 186,195 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 66,195 shares of common stock; (ii) 196,500 shares held in joint tenancy with spouse; (iii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iv) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 128,323 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 106,195 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 166,195 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 9,712 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 116,195 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 95,678 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 59,036 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 8,868 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 65,664 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 7,591 shares of common stock; (ii) 12,420 remaining shares of restricted stock that vest ratably over a five-year period on the anniversary of the November 30, 2021 date of grant; and (iii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 9,128 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

These shares represent restricted stock that was granted under the Issuer's 2021 Equity Incentive Plan pursuant to the terms of such plan. This restricted stock is scheduled to vest in full on the anniversary of the grant date of May 18, 2026.

Consists of (i) 8,868 shares of common stock; and (ii) 3,883 shares of restricted stock reported on this Form 4.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 154,088 restricted stock units of which 24,365 vest in three equal annual installments beginning March 3, 2026 after market close, and 129,723 vest in five equal installments beginning on March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 16,864 restricted stock units that vest in three equal annual installments beginning March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 16,961 common shares. The understatement was the effect of a clerical error as the calculation omitted 16,961 directly held shares that were acquired on March 1, 2026 and reported on prior Form 4s. The amount shown in this table corrects the inadvertent exclusion.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 34,697 restricted stock units of which 6,497 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 920 common shares. The understatement was the net effect of two clerical errors. The first was an understatement of 20 shares in the disclosure of directly owned shares disposed of for tax withholding, resulting in an overstatement of 20 shares beneficially owned. To clarify, the Form 4 filed on March 3, 2026 should have disclosed that a total of 3,955 directly owned shares were disposed of for tax withholding (not 3,935 shares). The second clerical error was the omission of 940 directly held shares that had been previously been reported as acquired. The net of these transactions was an understatement of 920 common shares. The amount shown in this table corrects those two inadvertent clerical errors.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 33,163 restricted stock units of which 4,963 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 4,903 restricted stock units that vest in three equal annual installments beginning March 3, 2026, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 12,408 restricted stock units that vest in three equal annual installments beginning March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 33,671 restricted stock units that vest in three equal annual installments beginning March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 920 common shares. The understatement was the net effect of two clerical errors. The first was an understatement of 20 shares in the disclosure of directly owned shares disposed of for tax withholding, resulting in an overstatement of 20 shares beneficially owned. To clarify, the Form 4 filed on March 3, 2026 should have disclosed that a total of 3,955 directly owned shares were disposed of for tax withholding (not 3,935 shares). The second clerical error was the omission of 940 directly held shares that had been previously been reported as acquired. The net of these transactions was an understatement of 920 common shares. The amount shown in this table corrects those two inadvertent clerical errors.

Restricted stock units convert into common stock on a one-for-one basis.

On March 3, 2025, the reporting person was granted 34,697 restricted stock units of which 6,497 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Restricted stock units convert into common stock on a one-for-one basis.

The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 16,961 common shares. The understatement was the effect of a clerical error as the calculation omitted 16,961 directly held shares that were acquired on March 1, 2026 and reported on prior Form 4s. The amount shown in this table corrects the inadvertent exclusion.

Includes 200,000 shares held in joint tenancy with spouse.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 33,301 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 4,629 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 15,162 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of Company common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 24,340 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 7,099 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 11,156 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.

Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.

On March 2, 2026, the reporting person was granted 4,540 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.