WESTERMANN DONALD MICHAEL (Chief Information Officer) received a stock award from EASTERN BANKSHARES, INC.

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

WESTERMANN DONALD MICHAEL

Filed: 3/3/2026ACC: 0001193125-26-088426

InsiderWESTERMANN DONALD MICHAELCIK 1825585

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IssuerEASTERN BANKSHARES, INC.CIK 1810546

Officer· Chief Information Officer

Since Oct 2020

+3.65K

Net shares

Net buyer

$175.5K

Total sold

Open market trades

0B · 0S

Total transactions

26.98K acquired · 23.33K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+14.36K

Price / share

—

Trade value

—

% of position

68.8%

3/1/2026

20.86K→35.22K

Common Stock

Direct

F · Tax Withholding

−6.52K

Price / share

$19.56

Trade value

$127.57K

% of position

18.5%

3/1/2026

35.22K→28.70K

Common Stock

Direct

A · Award

+5.52K

Price / share

—

Trade value

—

% of position

19.2%

3/1/2026

28.70K→34.22K

Common Stock

Direct

F · Tax Withholding

−2.45K

Price / share

$19.56

Trade value

$47.90K

% of position

7.2%

3/1/2026

34.22K→31.77K

Total

Net shares

+10.91K

Net value

-$175.47K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	3/1/2026	M · Option Exercise	+14.36K	—	—	68.8%	20.86K	35.22K
Common Stock Direct	3/1/2026	F · Tax Withholding	−6.52K	$19.56	$127.57K	18.5%	35.22K	28.70K
Common Stock Direct	3/1/2026	A · Award	+5.52K	—	—	19.2%	28.70K	34.22K
Common Stock Direct	3/1/2026	F · Tax Withholding	−2.45K	$19.56	$47.90K	7.2%	34.22K	31.77K
Total			+10.91K		-$175.47K

Derivative Transactions4

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common stock

9.49K shares

−9.49K

Strike price

Held after

9.49K

Exercisable

—

3/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common stock

1.98K shares

−1.98K

Strike price

Held after

0.00

Exercisable

—

3/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common stock

2.89K shares

−2.89K

Strike price

Held after

2.90K

Exercisable

—

3/1/2026

Restricted Stock Units

Direct

A · Award

Converts to

Common stock

7.10K shares

+7.10K

Strike price

Held after

7.10K

Exercisable

—

3/2/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common stock9.49K shares	3/1/2026	M · Option Exercise	−9.49K	—	9.49K
Restricted Stock Units Direct	Common stock1.98K shares	3/1/2026	M · Option Exercise	−1.98K	—	0.00
Restricted Stock Units Direct	Common stock2.89K shares	3/1/2026	M · Option Exercise	−2.89K	—	2.90K
Restricted Stock Units Direct	Common stock7.10K shares	3/2/2026	A · Award	+7.10K	—	7.10K

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned4.92K

Common Stock

Indirect

Shares owned22.68K

Total

27.60K indirect27.60K

Security Title	Shares Owned	Ownership Type
Common Stock	4.92K	Indirect
Common Stock	22.68K	Indirect
Total	27.60K	27.60K indirect

Derivative Holdings (Post-Transaction)1

Restricted Stock Units

Direct

Underlying security

Common stock

Underlying shares

34.70K

Shares owned

34.70K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

34.70K

Owned

34.70K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common stock		—	—	34.70K	34.70K
Total					34.70K	34.70K