Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ECBK held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | ALLIANCEBERNSTEIN L.P. | 787K | $13.7M | -1.4% | 8.969% | 0.00% |
| 2 | BlackRock, Inc. | 395K | $6.6M | -1.3% | 4.496% | 0.00% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 384K | $6.4M | — | 4.374% | 0.00% |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | 154K | $2.6M | -9.7% | 1.757% | 0.00% |
| 5 | Sachetta, LLC | 119K | $2.0M | 0.0% | 1.354% | 1.08% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 88K | $1.5M | -4.9% | 1.001% | 0.00% |
| 7 | STATE STREET CORP | 80K | $1.3M | +5.7% | 0.907% | 0.00% |
| 8 | NORTHERN TRUST CORP | 63K | $1.1M | +1.8% | 0.722% | 0.00% |
| 9 | Oppenheimer & Close, LLC | 61K | $1.0M | 0.0% | 0.695% | 0.64% |
| 10 | MALTESE CAPITAL MANAGEMENT LLC | 55K | $923K | +21.3% | 0.629% | 0.18% |
| 11 | Covalent Partners LLC | 50K | $837K | +51.5% | 0.570% | 5.89% |
| 12 | Minerva Advisors LLC | 50K | $835K | 0.0% | 0.569% | 0.54% |
| 13 | VANGUARD FIDUCIARY TRUST CO | 48K | $811K | — | 0.552% | 0.00% |
| 14 | MORGAN STANLEY | 44K | $734K | -5.3% | 0.500% | 0.00% |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | 43K | $724K | — | 0.493% | 0.00% |
| 16 | HighTower Advisors, LLC | 43K | $719K | +0.0% | 0.490% | 0.00% |
| 17 | GOLDMAN SACHS GROUP INC | 31K | $520K | +50.0% | 0.354% | 0.00% |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 20K | $339K | -14.7% | 0.231% | 0.00% |
| 19 | Stilwell Value LLC | 20K | $335K | 0.0% | 0.228% | 0.20% |
| 20 | GRIMES & COMPANY, INC. | 20K | $335K | 0.0% | 0.228% | 0.01% |
| 21 | Bank of New York Mellon Corp | 17K | $284K | -7.8% | 0.193% | 0.00% |
| 22 | RAFFLES ASSOCIATES LP | 13K | $224K | -6.0% | 0.153% | 0.19% |
| 23 | Mariner, LLC | 13K | $216K | +11.5% | 0.147% | 0.00% |
| 24 | RHUMBLINE ADVISERS | 10K | $164K | -2.0% | 0.112% | 0.00% |
| 25 | UBS Group AG | 9K | $158K | +17.4% | 0.108% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ECBK — a direct measure of their conviction.
Filings activity in ECBK during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ECBK position in Q1 2026
Institutions that fully closed their ECBK position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 57 | +14% | 26.47% | 0.96 pp | $45M | 3.5% |
| Q4 2025 | 50 | +8.7% | 27.43% | +2.85 pp | $47M | +12% |
| Q3 2025 | 46 | +12% | 24.58% | +0.48 pp | $42M | +2.0% |
| Q2 2025 | 41 | +46% | 24.10% | +4.48 pp | $41M | +23% |
| Q1 2025 | 28 | +3.7% | 19.62% | +0.15 pp | $33M | +0.8% |
| Q4 2024 | 27 | +8.0% | 19.47% | +1.42 pp | $33M | +7.9% |
| Q3 2024 | 25 | +8.7% | 18.05% | +2.57 pp | $31M | +17% |
| Q2 2024 | 23 | — | 15.48% | — | $26M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ECBK stock.
Based on Q1 2026 13F filings, institutional ownership of ECB Bancorp, Inc. stands at 26.5%, held across 57 reporting institutions.
ALLIANCEBERNSTEIN L.P. is the largest reported institutional holder of ECBK, with approximately 787,279 shares worth $0.01B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of ECBK, including RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for ECBK is 51 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
11 institutions opened new positions in ECBK during Q1 2026, while 4 fully exited. 12 added to existing positions and 34 trimmed.
ECBK institutional ownership fell by 0.96 percentage points quarter-over-quarter, with a net change of +7 holders.
The top 10 institutions account for 82.6% of all reported 13F value in ECBK, and the top 25 account for 98.7%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
ECB Bancorp, Inc. (ECBK) Institutional Ownership