ECB Bancorp, Inc.
ECB Bancorp, Inc. (ECBK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ECBK · as of Sep 30, 2025
Ownership Breakdown
49
Institutional Holders
▲ 9 vs Q2
$41.70M
Total Inst. Value
▲ $501,413 vs Q2
8.75M
Shares Outstanding
freeFloat 91.19%
2.63M
13F Shares Held
▼ 40,692 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ECBK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ALLIANCEBERNSTEIN L.P. savings institutions, not federally chartered | 803.2K | 9.85% | 9.85% | $12.75B | Nov 14, 2025 | ▼ 25.3K |
VANGUARD GROUP INC savings institutions, not federally chartered | 491.2K | 6.02% | 6.02% | $7.80B | Nov 7, 2025 | ▼ 9.2K |
BLACKROCK, INC. savings institutions, not federally chartered | 382.9K | 4.70% | 4.70% | $6.08B | Nov 12, 2025 | ▲ 16.6K |
GEODE CAPITAL MANAGEMENT, LLC savings institutions, not federally chartered | 171.9K | 2.11% | 2.11% | $2.73B | Nov 12, 2025 | ▼ 974 |
SACHETTA, LLC savings institutions, not federally chartered | 118.9K | 1.46% | 1.46% | $1.89B | Oct 24, 2025 | ▲ 3.6K |
RENAISSANCE TECHNOLOGIES LLC savings institutions, not federally chartered | 94.4K | 1.16% | 1.16% | $1.50B | Nov 13, 2025 | ▲ 11.3K |
STATE STREET CORP savings institutions, not federally chartered | 75.1K | 92.06% | 92.06% | $1.19B | Nov 14, 2025 | ▲ 5.7K |
NORTHERN TRUST CORP savings institutions, not federally chartered | 68.1K | 83.48% | 83.48% | $1.08B | Nov 14, 2025 | ▼ 2.9K |
OPPENHEIMER & CLOSE, LLC savings institutions, not federally chartered | 61.0K | 74.80% | 74.80% | $968.18M | Nov 10, 2025 | — held |
MINERVA ADVISORS LLC savings institutions, not federally chartered | 49.9K | 61.23% | 61.23% | $792.55M | Nov 12, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
15
Increased
+55.7K shares12
New Positions
first time holders11
Decreased
−66.8K shares1
Sold Out
fully exitedNet shares change (top 50)
11.1K
+55.7K / −66.8K
Net new holders
+15
12 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ECBK insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
4
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Lavertu Brandon CFO | Apr 30, 2026 | Purchase | 10 | $17.92 | $179.2 | 32.4K | Form 4 ↗ |
Lavertu Brandon CFO | Apr 30, 2026 | Purchase | 10 | $17.91 | $179.1 | 32.4K | Form 4 ↗ |
Lavertu Brandon CFO | Apr 30, 2026 | Purchase | 10 | $17.88 | $178.8 | 32.4K | Form 4 ↗ |
Lavertu Brandon CFO | Apr 30, 2026 | Purchase | 10 | $17.85 | $178.5 | 32.4K | Form 4 ↗ |
Sullivan Maura Ellen director | Feb 9, 2026 | Purchase | 2,200 | $18.50 | $40.7K | 5.7K | Form 4 ↗ |
Sullivan Maura Ellen director | Dec 17, 2025 | Award | 1,150 | — | — | 1.1K | Form 4 ↗ |
Sullivan Maura Ellen director | Dec 9, 2025 | Purchase | 63 | $17.05 | $1.1K | 3.5K | Form 4 ↗ |
Sullivan Maura Ellen director | Dec 9, 2025 | Purchase | 100 | $17.04 | $1.7K | 3.4K | Form 4 ↗ |
Sullivan Maura Ellen director | Dec 9, 2025 | Purchase | 400 | $16.95 | $6.8K | 3.3K | Form 4 ↗ |
Sullivan Maura Ellen director | Dec 8, 2025 | Purchase | 500 | $16.90 | $8.4K | 2.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
ECB Bancorp, Inc. (ECBK) is primarily owned by institutional investors, who hold approximately 30.0% of total shares outstanding. Company insiders own approximately 8.81%, while retail and public investors account for the remaining 61.17%.
The largest institutional shareholder of ECB Bancorp, Inc. is ALLIANCEBERNSTEIN L.P., holding approximately 803,175 shares — equal to 9.85% of outstanding shares — as of September 30, 2025.
A total of 49 institutional investors currently hold ECBK stock, with a combined institutional value of approximately $41,702,240 as of the most recent 13F filing period.
Frequently asked questions
ECBK ownershipECB Bancorp, Inc. (ECBK) is primarily owned by institutional investors, who hold approximately 30.0% of shares. The largest shareholder is ALLIANCEBERNSTEIN L.P. with a 9.85% stake. Company insiders hold 8.81%. Data sourced from SEC Form 13F as of September 30, 2025.