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Donald Michael Westermann

EBC
CHIEF INFORMATION OFFICER · EASTERN BANKSHARES, INC. · CIK 0001825585
FILING MIX · LIFETIME42%/58%
BUYS
13
SELLS
18
TOTAL VALUE
$1.31M
COMPANIES
1
ACTIVE SINCE
Oct 2020
HOLDINGS NOW
32,972
AVG SELL PX
$18.48
TRADE KIND
SHOWING 31 / 31
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Donald Michael Westermann, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d1+0.00%+9.33%-1.33%+10.66%+10.66%—
14d1+0.00%+7.98%-0.50%+8.47%+8.47%—
30d1+100.00%-1.86%-1.36%-0.50%-0.50%—
60d1+100.00%-3.86%-9.12%+5.26%+5.26%—
90d1+0.00%+1.05%+2.34%-1.29%-1.29%—
180d1(1 pending)——————
1y1(1 pending)——————
2y1(1 pending)——————
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
EBC · 32,972 shares · as of Mar 3, 2026
014,51229,02443,53658,048202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 13 buys / 18 sellsCOVERAGE · 22 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
2,165——32,532Mar 3, 2026Mar 5, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
2,165——33,933Mar 3, 2026Mar 5, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
961$19.45$18.7K32,972Mar 3, 2026Mar 5, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
7,099——7,099Mar 2, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
14,359——35,219Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
6,522$19.56$127.6K28,697Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
2,894——2,895Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
5,520——34,217Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
2,449$19.56$47.9K31,768Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
1,977——0Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
9,488——9,488Mar 1, 2026Mar 3, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
21,256$20.11$427.5K20,860Jan 28, 2026Jan 29, 2026 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
34,697——34,697Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
9,488——18,976Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
35,578——58,048Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
1,977——1,977Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
14,359——28,839Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
2,894——5,789Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
6,369$17.73$112.9K22,470Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
15,932$17.73$282.5K42,116Mar 3, 2025Mar 5, 2025 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
9,487——28,464Mar 1, 2024Mar 5, 2024 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
11,463——18,037Mar 1, 2024Mar 5, 2024 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
1,976——3,954Mar 1, 2024Mar 5, 2024 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
8,683——8,683Mar 1, 2024Mar 5, 2024 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
3,557$12.81$45.6K14,480Mar 1, 2024Mar 5, 2024 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
9,487——9,487Mar 1, 2023Mar 3, 2023 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
9,487——37,951Mar 1, 2023Mar 3, 2023 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
5,930——5,930Mar 1, 2023Mar 3, 2023 ↗View →
EBC
EASTERN BANKSHARES, INC.
SALE
Chief Information Officer
2,913$15.63$45.5K6,574Mar 1, 2023Mar 3, 2023 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASEGRANT
Stock grant
47,438——47,438Mar 1, 2022Mar 3, 2022 ↗View →
EBC
EASTERN BANKSHARES, INC.
PURCHASE
Chief Information Officer
20,000$10.00$200.0K20,000Oct 14, 2020Oct 16, 2020 ↗View →
Other insiders · EBC
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About this filer
CIK 0001825585
ROLE
Chief Information Officer
PRIMARY
EBC
COMPANIES
1
ACTIVE SINCE
Oct 2020
MARKETPEEL · /INSIDER/0001825585DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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