NB BancorpNBBK
13F holders, Q4 2025 (December 31)164holders +18
32new positions
13sold out
6famous investors
$19.81avg. 13F price*
At the end of Q4 2025, 164 institutions reported holding NB Bancorp Inc. (NBBK) in their 13F filings, up 18 from Q3 2025. 32 opened new positions and 13 sold out. The largest holders were BlackRock, Inc. ($61.5M), Pertento Partners LLP ($46.5M) and Vanguard Group Inc. ($45.6M). 6 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 Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- NB Bancorp Inc.
- CUSIP
- 63945M107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 32 | $41.7M |
| Exits | 13 | $8.0M |
All 13F filers, Q3 2025 → Q4 2025: 5,097,920 shares bought and 1,933,677 shares sold, net +3,164,243 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 164 holders
| BlackRock, Inc. | 0.00% | Add +10.0% | 3,103,770 | $61.5M |
| Pertento Partners LLP | 5.10% | Add +10.8% | 2,343,776 | $46.5M |
| Vanguard Group Inc. | 0.00% | Add +18.0% | 2,301,034 | $45.6M |
| Wellington Management Group LLP | 0.01% | Reduce -19.5% | 1,471,189 | $29.2M |
| State Street Corp. | 0.00% | Reduce -6.9% | 1,114,379 | $22.1M |
| Geode Capital Management, LLC | 0.00% | Add +10.3% | 966,662 | $19.2M |
| Hotchkis & Wiley Capital Management LLC | 0.04% | Add +1.0% | 701,992 | $13.9M |
| AltraVue Capital, LLC | 1.13% | New | 693,000 | $13.7M |
| Goldman Sachs Group Inc. | 0.00% | Add +13.1% | 593,888 | $11.8M |
| Tieton Capital Management, LLC | 3.56% | New | 524,935 | $10.4M |
| FMR LLC | 0.00% | Add +18.0% | 383,212 | $7.6M |
| Nuveen, LLC | 0.00% | Add +218.9% | 346,779 | $6.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +14.6% | 329,398 | $6.5M |
| Northern Trust Corp. | 0.00% | Add +4.7% | 324,313 | $6.4M |
| Dimensional Fund Advisors LP | 0.00% | New | 288,028 | $5.7M |
| Alliancebernstein L.P. | 0.00% | Add +524.2% | 254,219 | $5.0M |
| Two Sigma Investments, LP | 0.01% | Add +22.8% | 252,845 | $5.0M |
| Marshall Wace, LLP | 0.00% | Reduce -9.2% | 251,512 | $5.0M |
| Renaissance Technologies | 0.01% | Add +126.6% | 251,274 | $5.0M |
| Morgan Stanley | 0.00% | Add +98.4% | 242,132 | $4.8M |
| American Century Companies Inc. | 0.00% | Add +61.6% | 221,855 | $4.4M |
| Bridgeway Capital Management, LLC | 0.08% | Add +68.2% | 193,150 | $3.8M |
| Hennessy Advisors Inc. | 0.13% | Reduce -2.2% | 181,000 | $3.6M |
| EJF Capital LP | 1.97% | Add +1.3% | 174,979 | $3.5M |
| Legato Capital Management LLC | 0.29% | New | 171,361 | $3.4M |
| Empowered Funds, LLC | 0.05% | Add +91.9% | 153,150 | $3.0M |
| Panagora Asset Management Inc. | 0.01% | Reduce -12.9% | 150,391 | $3.0M |
| Bank of New York Mellon Corp | 0.00% | Add +51.0% | 149,221 | $3.0M |
| UBS Group AG | 0.00% | Reduce -61.4% | 146,094 | $2.9M |
| New York State Common Retirement Fund | 0.00% | Add +1343.8% | 144,385 | $2.9M |
| Sei Investments Co. | 0.00% | Add +511.8% | 143,784 | $2.8M |
| First Trust Advisors LP | 0.00% | Add +13.2% | 142,087 | $2.8M |
| Two Sigma Advisers, LP | 0.01% | Add +4.4% | 140,001 | $2.8M |
| Financial Engines Advisors L.L.C. | 0.00% | Reduce -9.0% | 117,707 | $2.3M |
| Mangrove Partners Im, LLC | 0.18% | Reduce -2.4% | 111,356 | $2.2M |
| Citadel Advisors | 0.00% | Add +79.4% | 106,457 | $2.1M |
| AQR Capital Management | 0.00% | Add +28.7% | 105,011 | $2.1M |
| Focus Partners Wealth | 0.00% | Add +7.0% | 91,366 | $1.8M |
| Bank of America Corp. | 0.00% | Add +38.5% | 90,641 | $1.8M |
| International Assets Investment Management, LLC | 0.12% | No change | 86,900 | $1.7M |
| Oppenheimer & Close, LLC | 1.12% | No change | 82,999 | $1.6M |
| Los Angeles Capital Management LLC | 0.01% | Add +93.6% | 90,370 | $1.6M |
| Jane Street Group, LLC | 0.00% | Add +50.6% | 81,641 | $1.6M |
| Ameriprise Financial Inc. | 0.00% | Add +0.3% | 78,600 | $1.6M |
| Swiss National Bank | 0.00% | Add +21.4% | 77,100 | $1.5M |
| BNP Paribas Financial Markets | 0.00% | Add +168.0% | 70,879 | $1.4M |
| Barclays PLC | 0.00% | Add +33.8% | 70,772 | $1.4M |
| Stilwell Value LLC | 1.21% | Reduce -18.8% | 65,000 | $1.3M |
| Principal Financial Group Inc. | 0.00% | Add +46.2% | 64,469 | $1.3M |
| Invesco Ltd. | 0.00% | Add +19.8% | 63,337 | $1.3M |
| Legal & General Group Plc | 0.00% | Reduce -2.3% | 60,616 | $1.2M |
| JPMorgan Chase & Co. | 0.00% | Reduce -50.5% | 59,213 | $1.2M |
| Millennium Management | 0.00% | Reduce -89.9% | 54,866 | $1.1M |
| Lynch & Associates | 0.20% | Reduce -3.5% | 54,334 | $1.1M |
| Creative Planning | 0.00% | Add +83.1% | 52,495 | $1.0M |
| Rhumbline Advisers | 0.00% | Reduce -1.8% | 52,211 | $1.0M |
| Lazard Asset Management LLC | 0.00% | Add +0.8% | 52,160 | $1.0M |
| Round Rock Advisors LLC | 0.15% | Add +52.8% | 51,906 | $1.0M |
| Nixon Peabody Trust Co. | 0.07% | New | 48,516 | $962K |
| Integrated Wealth Concepts LLC | 0.01% | Add +1.0% | 47,596 | $943K |
| D. E. Shaw & Co. | 0.00% | Add +7.4% | 45,766 | $907K |
| Wells Fargo & Company | 0.00% | Add +69.1% | 45,419 | $900K |
| Integrated Quantitative Investments LLC | 0.17% | Add +181.6% | 40,944 | $812K |
| T. Rowe Price Associates Inc. | 0.00% | Add +112.8% | 39,493 | $783K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +0.4% | 39,192 | $777K |
| Verition Fund Management LLC | 0.00% | Add +9.7% | 38,264 | $758K |
| Aviance Capital Partners, LLC | 0.08% | No change | 37,167 | $737K |
| Mariner, LLC | 0.00% | Add +194.2% | 36,366 | $721K |
| California State Teachers Retirement System | 0.00% | Add +23.8% | 36,093 | $715K |
| Federated Hermes, Inc. | 0.00% | Add +404.8% | 34,237 | $679K |
| Occudo Quantitative Strategies LP | 0.04% | Add +73.2% | 32,155 | $637K |
| Susquehanna Fundamental Investments, LLC | 0.02% | Add +71.2% | 29,022 | $575K |
| Raffles Associates LP | 0.42% | Reduce -8.9% | 28,374 | $562K |
| Brandywine Global Investment Management, LLC | 0.00% | New | 27,470 | $544K |
| State of Wisconsin Investment Board | 0.00% | New | 26,641 | $528K |
| Belvedere Trading LLC | 0.10% | New | 26,577 | $527K |
| Susquehanna Portfolio Strategies, LLC | 0.01% | Reduce -7.1% | 25,370 | $503K |
| Deutsche Bank AG | 0.00% | Add +24.0% | 25,025 | $496K |
| LPL Financial LLC | 0.00% | Add +35.2% | 24,328 | $482K |
| Rafferty Asset Management, LLC | 0.00% | Reduce -54.1% | 24,196 | $480K |
| Quantinno Capital Management LP | 0.00% | New | 23,321 | $462K |
| MetLife Investment Management, LLC | 0.00% | Reduce -2.7% | 23,122 | $458K |
| Northeast Investment Management | 0.02% | Add +43.8% | 23,000 | $456K |
| Citigroup Inc. | 0.00% | Reduce -35.7% | 22,885 | $454K |
| Modera Wealth Management, LLC | 0.01% | No change | 22,011 | $436K |
| Commonwealth Equity Services, LLC | 0.00% | New | 21,496 | $426K |
| Four Tree Island Advisory LLC | 0.23% | New | 21,456 | $425K |
| ExodusPoint Capital Management, LP | 0.00% | Reduce -22.2% | 20,963 | $415K |
| Point72 Asset Management | 0.00% | Add +69.6% | 20,905 | $414K |
| Investment Advisory Group, LLC | 0.10% | No change | 20,000 | $396K |
| &partners | 0.00% | Add +0.1% | 19,830 | $393K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | New | 19,759 | $392K |
| Kestra Private Wealth Services, LLC | 0.00% | Add +0.2% | 19,700 | $390K |
| Arrowstreet Capital, Limited Partnership | 0.00% | New | 18,866 | $374K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +14.0% | 18,550 | $368K |
| NewEdge Wealth, LLC | 0.00% | New | 18,418 | $365K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -80.0% | 17,352 | $344K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +1.0% | 16,846 | $334K |
| Mercer Global Advisors Inc. | 0.00% | New | 16,698 | $331K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 16,681 | $331K |
"% of holder's portfolio" is NBBK's weight in each manager's 13F, not the share of NB Bancorp Inc. the manager owns.