Who owns NB Bancorp, Inc. Common Stock?
Institutional ownership of NBBK from SEC Form 13F filings across 114 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
114
13F holders
$297.9M
value, 2026 filers
34.2%
of shares outstanding (14.2M sh)
10
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of NBBK's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.3M | $70.4M | 0.0% | 8% | +8.0% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $35.3M | 0.0% | 4% | -51.0% |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $24.4M | 0.0% | 2.8% | +4.9% |
| 4 | GOLDMAN SACHS GROUP INC | 571,954 | $12.1M | 0.0% | 1.4% | -17.3% |
| 5 | Nuveen, LLC | 498,869 | $10.5M | 0.0% | 1.2% | +2.2% |
| 6 | FMR LLC | 497,305 | $10.5M | 0.0% | 1.2% | +13.6% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 397,046 | $8.4M | 0.0% | 1% | +2.8% |
| 8 | NORTHERN TRUST CORP | 360,492 | $7.6M | 0.0% | 0.9% | +7.5% |
| 9 | NEW YORK STATE COMMON RETIREMENT FUND | 346,155 | $7.3M | 0.0% | 0.8% | +32.8% |
| 10 | Sixth Street Partners Management Company, L.P.NEW | 318,612 | $6.7M | 1.2% | 0.8% | new |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 318,612 | $6.7M | 0.0% | 0.8% | +0.1% |
| 12 | CITADEL ADVISORS LLC | 289,814 | $6.1M | 0.0% | 0.7% | +149.0% |
| 13 | TWO SIGMA INVESTMENTS, LP | 277,027 | $5.9M | 0.0% | 0.7% | -25.5% |
| 14 | AMERICAN CENTURY COMPANIES INC | 261,866 | $5.5M | 0.0% | 0.6% | -0.7% |
| 15 | VANGUARD FIDUCIARY TRUST CO | 253,951 | $5.4M | 0.0% | 0.6% | 0.0% |
| 16 | MORGAN STANLEY | 229,194 | $4.8M | 0.0% | 0.6% | -18.1% |
| 17 | Bank of New York Mellon Corp | 171,541 | $3.6M | 0.0% | 0.4% | +15.9% |
| 18 | D. E. Shaw & Co., Inc. | 149,931 | $3.2M | 0.0% | 0.4% | +113.0% |
| 19 | SEI INVESTMENTS CO | 142,346 | $3.0M | 0.0% | 0.3% | -52.9% |
| 20 | FIRST TRUST ADVISORS LP | 142,253 | $3.0M | 0.0% | 0.3% | +1.4% |
| 21 | UBS Group AG | 140,405 | $3.0M | 0.0% | 0.3% | +84.5% |
| 22 | INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | 131,013 | $2.8M | 0.2% | 0.3% | 0.0% |
| 23 | ALLIANCEBERNSTEIN L.P. | 130,219 | $2.7M | 0.0% | 0.3% | 0.0% |
| 24 | Qube Research & Technologies Ltd | 127,236 | $2.7M | 0.0% | 0.3% | -27.3% |
| 25 | MARSHALL WACE, LLPNEW | 123,112 | $2.6M | 0.0% | 0.3% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.