Who owns NB Bancorp, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of NBBK from SEC Form 13F filings across 161 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.
As of the 2026-06-30 reporting period, 161 institutions disclosed 22.5M shares of NB Bancorp, Inc. worth $474.9M — about 56.6% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
161
13F holders
$474.9M
value, 2026 filers
56.6%
of shares outstanding (22.5M sh)
15
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% | 8.4% | +8.0% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $35.3M | 0.0% | 4.2% | -1.9% |
| 3 | AltraVue Capital, LLC | 1.7M | $35.0M | 2.5% | 4.2% | +26.9% |
| 4 | Pertento Partners LLP | 1.5M | $31.2M | 1.7% | 3.7% | -33.1% |
| 5 | STATE STREET CORP | 1.5M | $31.1M | 0.0% | 3.7% | +13.8% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 1.2M | $24.4M | 0.0% | 2.9% | +4.9% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 753,320 | $15.9M | 0.0% | 1.9% | +44.2% |
| 8 | GOLDMAN SACHS GROUP INC | 571,954 | $12.1M | 0.0% | 1.4% | -17.3% |
| 9 | Tieton Capital Management, LLC | 546,600 | $11.6M | 3.3% | 1.4% | -1.3% |
| 10 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 501,172 | $10.6M | 0.0% | 1.3% | +11.2% |
| 11 | Nuveen, LLC | 498,869 | $10.5M | 0.0% | 1.3% | +2.2% |
| 12 | FMR LLC | 497,305 | $10.5M | 0.0% | 1.3% | +13.6% |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | 397,046 | $8.4M | 0.0% | 1% | +2.8% |
| 14 | Legato Capital Management LLCNEW | 366,090 | $7.7M | 0.6% | 0.9% | new |
| 15 | NORTHERN TRUST CORP | 360,492 | $7.6M | 0.0% | 0.9% | +7.5% |
| 16 | NEW YORK STATE COMMON RETIREMENT FUND | 346,155 | $7.3M | 0.0% | 0.9% | +32.8% |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 318,612 | $6.7M | 0.0% | 0.8% | +0.1% |
| 18 | CITADEL ADVISORS LLC | 289,814 | $6.1M | 0.0% | 0.7% | +149.0% |
| 19 | TWO SIGMA INVESTMENTS, LP | 277,027 | $5.9M | 0.0% | 0.7% | -25.5% |
| 20 | AMERICAN CENTURY COMPANIES INC | 261,866 | $5.5M | 0.0% | 0.7% | -0.7% |
| 21 | VANGUARD FIDUCIARY TRUST CO | 253,951 | $5.4M | 0.0% | 0.6% | 0.0% |
| 22 | MORGAN STANLEY | 229,194 | $4.8M | 0.0% | 0.6% | -18.1% |
| 23 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 221,399 | $4.7M | 0.1% | 0.6% | +6.2% |
| 24 | Empowered Funds, LLC | 181,399 | $3.8M | 0.0% | 0.5% | +7.7% |
| 25 | HENNESSY ADVISORS INC | 178,000 | $3.8M | 0.1% | 0.4% | -1.1% |
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.