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NBBK · NB Bancorp, Inc.

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$22.42 +0.13 (+0.58%) At close · Jul 24
Market Cap
$996.50M
Shares
44.71M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 175
Total Value: $483,109,176
Total Shares: 22,927,077
Showing 1–100 of 178 holdings by value · page 1 of 2

Institutional Ownership Trend

11 quarters

Holder Concentration

Across 175 13F filers
Top Holder
13.5%
Dec 2023 → Mar 2026 · range 13.5% – 29.8%
of institutional value
Top 5
41.9%
Dec 2023 → Mar 2026 · range 41.9% – 76.6%
of institutional value
Top 10
57.6%
Dec 2023 → Mar 2026 · range 57.6% – 92.4%
of institutional value
HHI
486
Dec 2023 → Mar 2026 · range 486 – 1,634
Broadly held
Showing 100 of 178
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $64,984,553 13.45% 3,084,222
Mid Pertento Partners LLP $46,494,452 9.62% 2,206,666
Mega VANGUARD CAPITAL MANAGEMENT LLC $35,901,762 7.43% 1,703,928
Mid AltraVue Capital, LLC $27,476,964 5.69% 1,304,080
Mega STATE STREET CORP $27,254,845 5.64% 1,293,538
Mega GEODE CAPITAL MANAGEMENT, LLC $23,154,454 4.79% 1,098,930
Mega WELLINGTON MANAGEMENT GROUP LLP $14,959,700 3.10% 710,000
Mega GOLDMAN SACHS GROUP INC $14,573,444 3.02% 691,668
Small Tieton Capital Management, LLC $11,663,719 2.41% 553,570
Mega DIMENSIONAL FUND ADVISORS LP $11,006,628 2.28% 522,384
Mega Nuveen, LLC $10,282,853 2.13% 488,033
Large HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC $9,497,766 1.97% 450,772
Mega FMR LLC $9,222,865 1.91% 437,725
Mega TWO SIGMA INVESTMENTS, LP $7,833,973 1.62% 371,807
Mega NORTHERN TRUST CORP Bank $7,066,033 1.46% 335,360
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $6,707,950 1.39% 318,365
Large SEI INVESTMENTS CO $6,366,952 1.32% 302,181
Mega MORGAN STANLEY $5,896,855 1.22% 279,870
Mid Legato Capital Management LLC $5,816,794 1.20% 276,070
Large RENAISSANCE TECHNOLOGIES LLC $5,560,499 1.15% 263,906
Mega AMERICAN CENTURY COMPANIES INC $5,555,231 1.15% 263,656
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $5,490,525 1.14% 260,585
Mega VANGUARD FIDUCIARY TRUST CO Bank $5,352,580 1.11% 254,038
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $4,390,861 0.91% 208,394
Mid HENNESSY ADVISORS INC $3,761,140 0.78% 178,000
Large Qube Research & Technologies Ltd $3,688,640 0.76% 175,066
Large Empowered Funds, LLC $3,548,061 0.73% 168,394
Mega MILLENNIUM MANAGEMENT LLC $3,334,180 0.69% 158,243
Large PANAGORA ASSET MANAGEMENT INC $3,162,522 0.65% 150,096
Mega Bank of New York Mellon Corp Bank $3,119,750 0.65% 148,066
Mega FIRST TRUST ADVISORS LP $2,955,362 0.61% 140,264
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,793,882 0.58% 132,600
Mid INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC $2,768,304 0.57% 131,013
Mega ALLIANCEBERNSTEIN L.P. $2,743,714 0.57% 130,219
Mega AQR CAPITAL MANAGEMENT LLC $2,714,255 0.56% 128,821
Small Financial Engines Advisors L.L.C. $2,648,983 0.55% 125,723
Mega BANK OF AMERICA CORP /DE/ Bank $2,503,136 0.52% 118,801
Mega CITADEL ADVISORS LLC $2,451,936 0.51% 116,371
Mid MANGROVE PARTNERS IM, LLC $2,346,270 0.49% 111,356
Mega Invesco Ltd. $2,133,209 0.44% 101,244
Large Focus Partners Wealth $1,955,485 0.40% 92,809
Small Oppenheimer & Close, LLC $1,748,788 0.36% 82,999
Mega Swiss National Bank Bank $1,624,497 0.34% 77,100
Mega UBS Group AG $1,603,848 0.33% 76,120
Large Creative Planning $1,493,989 0.31% 70,906
Mega D. E. Shaw & Co., Inc. $1,483,011 0.31% 70,385
Large CREDIT AGRICOLE S A $1,474,900 0.31% 70,000
Small Round Rock Advisors LLC $1,400,459 0.29% 66,467
Micro STILWELL VALUE LLC $1,369,550 0.28% 65,000
Mega JANE STREET GROUP, LLC $1,278,295 0.26% 60,669
Mid OP Asset Management Ltd $1,230,319 0.25% 58,392
Large LAZARD ASSET MANAGEMENT LLC $1,207,353 0.25% 57,302
Mega PRINCIPAL FINANCIAL GROUP INC $1,166,518 0.24% 55,364
Mid Y-Intercept (Hong Kong) Ltd $1,152,451 0.24% 54,541
Mega RHUMBLINE ADVISERS $1,120,397 0.23% 53,175
Mega Legal & General Group Plc $1,116,878 0.23% 53,008
Mega BNP PARIBAS ARBITRAGE, SA $1,116,815 0.23% 53,005
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,087,064 0.23% 51,593
Large MACKENZIE FINANCIAL CORP $1,072,399 0.22% 50,897
Small LYNCH & ASSOCIATES/IN $1,063,557 0.22% 50,334
Large Mariner, LLC $1,042,859 0.22% 49,495
Small NIXON PEABODY TRUST CO Bank $1,022,232 0.21% 48,516
Mid Integrated Wealth Concepts LLC $1,009,821 0.21% 47,927
Mid WEDGE CAPITAL MANAGEMENT L L P/NC $913,154 0.19% 43,216
Mega AMERIPRISE FINANCIAL INC $884,076 0.18% 41,959
Small EJF Capital LP $873,498 0.18% 41,457
Mega PRICE T ROWE ASSOCIATES INC /MD/ $865,387 0.18% 41,072
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $848,615 0.18% 40,276
Mid XTX Topco Ltd $838,206 0.17% 39,782
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $829,356 0.17% 39,362
Small Aviance Capital Partners, LLC $783,108 0.16% 37,167
Small Integrated Quantitative Investments LLC $781,170 0.16% 37,075
Mega CITADEL ADVISORS LLC $777,483 0.16% 36,900
Mega JPMORGAN CHASE & CO $760,373 0.16% 36,088
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $754,242 0.16% 35,797
Large FEDERATED HERMES, INC. $714,251 0.15% 33,899
Mega CITIGROUP INC $704,811 0.15% 33,451
Large Connor, Clark & Lunn Investment Management Ltd. $679,486 0.14% 32,249
Mega DEUTSCHE BANK AG\ Bank $655,403 0.14% 31,106
Large Rafferty Asset Management, LLC $632,057 0.13% 29,998
Large Allspring Global Investments Holdings, LLC $621,016 0.13% 29,474
Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $586,588 0.12% 27,840
Mega FRANKLIN RESOURCES INC $574,578 0.12% 27,270
Mega LPL Financial LLC $555,405 0.11% 26,360
Large Quantinno Capital Management LP $546,576 0.11% 25,941
Large LOS ANGELES CAPITAL MANAGEMENT LLC $534,651 0.11% 25,375
Mid Susquehanna Portfolio Strategies, LLC $534,545 0.11% 25,370
Mid NORTHEAST INVESTMENT MANAGEMENT $528,250 0.11% 25,000
Small Four Tree Island Advisory LLC $526,981 0.11% 25,011
Large STATE OF WISCONSIN INVESTMENT BOARD $513,813 0.11% 24,386
Mid MARTINGALE ASSET MANAGEMENT L P $503,573 0.10% 23,900
Mega Vanguard Global Advisers, LLC $495,439 0.10% 23,514
Mega VANGUARD ASSET MANAGEMENT, Ltd $494,807 0.10% 23,484
Mega BARCLAYS PLC $486,695 0.10% 23,099
Large MetLife Investment Management, LLC $480,522 0.10% 22,806
Large COMMONWEALTH EQUITY SERVICES, LLC $473,906 0.10% 22,492
Micro Investment Advisory Group, LLC $421,400 0.09% 20,000
Large &PARTNERS $415,711 0.09% 19,730
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $393,861 0.08% 18,693
Small Polymer Capital Management (US) LLC $376,436 0.08% 17,866
Key facts CIK 1979330 CUSIP 63945M107 13F (30d) 24 filings 24 filers Visit website Investor relations

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