NB BancorpNBBK
13F holders, Q2 2026 (June 30)161holders −16
12new positions
26sold out
5famous investors
$21.13avg. 13F price*
At the end of Q2 2026, 161 institutions reported holding NB Bancorp Inc. (NBBK) in their 13F filings, down 16 from Q1 2026. 12 opened new positions and 26 sold out. The largest holders were BlackRock, Inc. ($70.4M), Vanguard Capital Management LLC ($35.3M) and AltraVue Capital, LLC ($35.0M). 5 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- NB Bancorp Inc.
- CUSIP
- 63945M107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 12 | $5.9M |
| Exits | 26 | $25.4M |
All 13F filers, Q1 2026 → Q2 2026: 2,285,391 shares bought and 2,894,950 shares sold, net −609,559 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 161 holders
| BlackRock, Inc. | 0.00% | Add +8.0% | 3,331,544 | $70.4M |
| Vanguard Capital Management LLC | 0.00% | Reduce -1.9% | 1,670,835 | $35.3M |
| AltraVue Capital, LLC | 2.52% | Add +26.9% | 1,655,108 | $35.0M |
| Pertento Partners LLP | 2.24% | Reduce -33.1% | 1,475,770 | $31.2M |
| State Street Corp. | 0.00% | Add +13.8% | 1,471,766 | $31.1M |
| Geode Capital Management, LLC | 0.00% | Add +4.9% | 1,153,217 | $24.4M |
| Dimensional Fund Advisors LP | 0.00% | Add +44.2% | 753,320 | $15.9M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -17.3% | 571,954 | $12.1M |
| Tieton Capital Management, LLC | 3.32% | Reduce -1.3% | 546,600 | $11.6M |
| Hotchkis & Wiley Capital Management LLC | 0.03% | Add +11.2% | 501,172 | $10.6M |
| Nuveen, LLC | 0.00% | Add +2.2% | 498,869 | $10.5M |
| FMR LLC | 0.00% | Add +13.6% | 497,305 | $10.5M |
| Vanguard Portfolio Management LLC | 0.00% | Add +2.8% | 397,046 | $8.4M |
| Legato Capital Management LLC | 0.64% | Add +32.6% | 366,090 | $7.7M |
| Northern Trust Corp. | 0.00% | Add +7.5% | 360,492 | $7.6M |
| New York State Common Retirement Fund | 0.01% | Add +32.8% | 346,155 | $7.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +0.1% | 318,612 | $6.7M |
| Citadel Advisors | 0.00% | Add +149.0% | 289,814 | $6.1M |
| Two Sigma Investments, LP | 0.00% | Reduce -25.5% | 277,027 | $5.9M |
| American Century Companies Inc. | 0.00% | Reduce -0.7% | 261,866 | $5.5M |
| Vanguard Fiduciary Trust Co. | 0.00% | Reduce -0.0% | 253,951 | $5.4M |
| Morgan Stanley | 0.00% | Reduce -18.1% | 229,194 | $4.8M |
| Bridgeway Capital Management, LLC | 0.08% | Add +6.2% | 221,399 | $4.7M |
| Empowered Funds, LLC | 0.02% | Add +7.7% | 181,399 | $3.8M |
| Hennessy Advisors Inc. | 0.12% | Reduce -1.1% | 178,000 | $3.8M |
| Bank of New York Mellon Corp | 0.00% | Add +15.8% | 171,541 | $3.6M |
| D. E. Shaw & Co. | 0.00% | Add +113.0% | 149,931 | $3.2M |
| Sei Investments Co. | 0.00% | Reduce -52.9% | 142,346 | $3.0M |
| First Trust Advisors LP | 0.00% | Add +1.4% | 142,253 | $3.0M |
| UBS Group AG | 0.00% | Add +84.5% | 140,405 | $3.0M |
| International Assets Investment Management, LLC | 0.17% | No change | 131,013 | $2.8M |
| Renaissance Technologies | 0.00% | Reduce -50.2% | 131,440 | $2.8M |
| Alliancebernstein L.P. | 0.00% | No change | 130,219 | $2.7M |
| Panagora Asset Management Inc. | 0.01% | Reduce -13.8% | 129,355 | $2.7M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -27.3% | 127,236 | $2.7M |
| Financial Engines Advisors L.L.C. | 0.00% | Add +0.8% | 126,788 | $2.7M |
| Marshall Wace, LLP | 0.00% | New | 123,112 | $2.6M |
| AQR Capital Management | 0.00% | Reduce -9.7% | 116,349 | $2.5M |
| Mangrove Partners Im, LLC | 0.15% | No change | 111,356 | $2.4M |
| Invesco Ltd. | 0.00% | Reduce -3.3% | 97,941 | $2.1M |
| Oppenheimer & Close, LLC | 1.11% | No change | 82,999 | $1.8M |
| Millennium Management | 0.00% | Reduce -48.5% | 81,447 | $1.7M |
| Swiss National Bank | 0.00% | No change | 77,100 | $1.6M |
| Credit Agricole S A | 0.00% | No change | 70,000 | $1.5M |
| Mackenzie Financial Corp. | 0.00% | Add +32.5% | 67,441 | $1.4M |
| Creative Planning | 0.00% | Reduce -5.1% | 67,320 | $1.4M |
| Round Rock Advisors LLC | 0.18% | Add +0.1% | 66,530 | $1.4M |
| Focus Partners Wealth | 0.00% | Reduce -29.2% | 65,728 | $1.4M |
| BNP Paribas Financial Markets | 0.00% | Add +17.9% | 62,478 | $1.3M |
| Principal Financial Group Inc. | 0.00% | Add +7.0% | 59,231 | $1.3M |
| Legal & General Group Plc | 0.00% | Add +7.0% | 56,718 | $1.2M |
| Y-Intercept (Hong Kong) Ltd | 0.02% | New | 54,541 | $1.2M |
| Rhumbline Advisers | 0.00% | Reduce -0.9% | 52,690 | $1.1M |
| Lynch & Associates | 0.19% | Reduce -5.6% | 50,334 | $1.1M |
| Stilwell Value LLC | 1.10% | Reduce -23.1% | 50,000 | $1.1M |
| Bank of America Corp. | 0.00% | Reduce -58.8% | 48,905 | $1.0M |
| Nixon Peabody Trust Co. | 0.07% | No change | 48,516 | $1.0M |
| Integrated Wealth Concepts LLC | 0.01% | Reduce -0.5% | 47,691 | $1.0M |
| Ameriprise Financial Inc. | 0.00% | Add +11.8% | 46,899 | $991K |
| Citigroup Inc. | 0.00% | Add +39.3% | 46,580 | $984K |
| Trexquant Investment LP | 0.01% | New | 46,312 | $979K |
| T. Rowe Price Associates Inc. | 0.00% | Add +12.0% | 46,016 | $973K |
| Federated Hermes, Inc. | 0.00% | Add +32.6% | 44,967 | $950K |
| Quantinno Capital Management LP | 0.00% | Add +70.1% | 44,137 | $933K |
| Wedge Capital Management L L P | 0.02% | Add +2.0% | 43,216 | $913K |
| Mariner, LLC | 0.00% | Reduce -14.2% | 42,471 | $897K |
| XTX Topco Ltd | 0.01% | Add +5.3% | 41,912 | $886K |
| Deutsche Bank AG | 0.00% | Add +31.9% | 41,024 | $867K |
| EJF Capital LP | 0.58% | Reduce -1.7% | 40,751 | $861K |
| California State Teachers Retirement System | 0.00% | Add +9.0% | 39,017 | $824K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -2.5% | 38,359 | $811K |
| Aviance Capital Partners, LLC | 0.08% | Add +2.7% | 38,173 | $807K |
| State of Wisconsin Investment Board | 0.00% | Add +56.5% | 38,169 | $807K |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -10.7% | 35,981 | $760K |
| Wells Fargo & Company | 0.00% | Add +117.8% | 35,185 | $743K |
| Bleakley Financial Group, LLC | 0.01% | Add +152.7% | 34,272 | $724K |
| Raffles Associates LP | 0.57% | Add +114.3% | 31,874 | $673K |
| Allspring Global Investments Holdings, LLC | 0.00% | Add +3.2% | 30,429 | $658K |
| Raymond James Financial Inc. | 0.00% | Add +200.7% | 29,914 | $632K |
| Franklin Resources Inc. | 0.00% | Add +4.0% | 28,370 | $599K |
| LPL Financial LLC | 0.00% | Add +0.2% | 26,409 | $558K |
| Rafferty Asset Management, LLC | 0.00% | Reduce -14.9% | 25,529 | $539K |
| Northeast Investment Management | 0.02% | No change | 25,000 | $528K |
| Vanguard Global Advisers, LLC | 0.00% | Add +4.0% | 24,444 | $517K |
| MetLife Investment Management, LLC | 0.00% | Add +5.5% | 24,072 | $509K |
| Barclays PLC | 0.00% | Add +3.7% | 23,951 | $506K |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.00% | No change | 23,484 | $496K |
| Russell Investments Group, Ltd. | 0.00% | Add +391.1% | 21,332 | $451K |
| Mirabella Financial Services LLP | 0.05% | New | 20,227 | $427K |
| Investment Advisory Group, LLC | 0.09% | No change | 20,000 | $423K |
| &partners | 0.00% | No change | 19,730 | $417K |
| JPMorgan Chase & Co. | 0.00% | Reduce -46.6% | 19,283 | $409K |
| Commonwealth Equity Services, LLC | 0.00% | Reduce -14.3% | 19,285 | $407K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +0.3% | 18,740 | $396K |
| Harbor Advisors LLC | 0.05% | Add +75.0% | 17,500 | $370K |
| Mercer Global Advisors Inc. | 0.00% | Add +45.2% | 16,992 | $359K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.00% | No change | 16,976 | $359K |
| Kestra Private Wealth Services, LLC | 0.00% | Reduce -5.4% | 16,766 | $354K |
| Rockland Trust Co. | 0.01% | No change | 15,969 | $337K |
| Cerity Partners LLC | 0.00% | Reduce -10.5% | 15,558 | $329K |
"% of holder's portfolio" is NBBK's weight in each manager's 13F, not the share of NB Bancorp Inc. the manager owns.