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Livermore
Livermore
ZHEN

NB Bancorp, Inc.

NBBK
Exchange
Nasdaq
Industry
Savings Institutions, Not Federally Chartered
SEC CIK
0001979330

In the last 90 days, NB Bancorp, Inc. insiders filed 2 open-market purchases and 1 sale; 161 institutions reported holding it in 13F filings for Q2 2026, worth $474.9M in total; no superinvestor holds it.

13F holders, Q2 2026

Institutional positions in NB Bancorp, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
161
−13 vs. Q1 2026
Shares held
22.5M
−594.8K (−2.6%) vs. Q1 2026
Total value
$474.9M
−$11.0M (−2.3%) vs. Q1 2026
New holders
13
68 more added
Sold out
26
49 more reduced

3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting NBBK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 161 institutions
Q1 2021: 0 institutionsQ2 2021: 0 institutionsQ3 2021: 0 institutionsQ4 2021: 0 institutionsQ1 2022: 0 institutionsQ2 2022: 0 institutionsQ3 2022: 0 institutionsQ4 2022: 0 institutionsQ1 2023: 0 institutionsQ2 2023: 0 institutionsQ3 2023: 0 institutionsQ4 2023: 17 institutionsQ1 2024: 56 institutionsQ2 2024: 92 institutionsQ3 2024: 108 institutionsQ4 2024: 114 institutionsQ1 2025: 122 institutionsQ2 2025: 132 institutionsQ3 2025: 146 institutionsQ4 2025: 164 institutionsQ1 2026: 177 institutionsQ2 2026: 161 institutions
Value heldQ2 2026: $474.9M
Q1 2021: $0Q2 2021: $0Q3 2021: $0Q4 2021: $0Q1 2022: $0Q2 2022: $0Q3 2022: $0Q4 2022: $0Q1 2023: $0Q2 2023: $0Q3 2023: $0Q4 2023: $34.7MQ1 2024: $131.0MQ2 2024: $253.2MQ3 2024: $355.7MQ4 2024: $326.7MQ1 2025: $331.3MQ2 2025: $334.4MQ3 2025: $338.8MQ4 2025: $441.3MQ1 2026: $486.3MQ2 2026: $474.9M
Institutions holding NBBK and their total value by quarter
QuarterHoldersValue
Q2 2026161$474.9M
Q1 2026177$486.3M
Q4 2025164$441.3M
Q3 2025146$338.8M
Q2 2025132$334.4M
Q1 2025122$331.3M
Q4 2024114$326.7M
Q3 2024108$355.7M
Q2 202492$253.2M
Q1 202456$131.0M
Q4 202317$34.7M
Q3 20230$0
Q2 20230$0
Q1 20230$0
Q4 20220$0
Q3 20220$0
Q2 20220$0
Q1 20220$0
Q4 20210$0
Q3 20210$0
Q2 20210$0
Q1 20210$0

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding NB Bancorp, Inc.; share changes are against Q1 2026.

Institutions holding NBBK in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
ExodusPoint Capital Management, LP15,487$327.2K0.00%+1,050+7.3%Added
Summit Wealth Group, LLC15,340$324.1K0.07%00.0%Unchanged
Flywheel Private Wealth LLC15,000$316.9K0.16%00.0%Unchanged
Jupiter Topco LLC14,800$312.8K0.00%+14,800New
SG Americas Securities, LLC13,672$289.0K0.00%+3,648+36.4%Added
Fifth Third Bancorp13,474$284.7K0.00%+1,303+10.7%Added
IMC-Chicago, LLC13,027$275.3K0.00%+13,027New
Police & Firemen's Retirement System of New Jersey12,624$266.7K0.00%+2,133+20.3%Added
Afg Fiduciary Services Limited Partnership12,493$264.1K0.21%+800+6.8%Added
Royal Bank of Canada12,407$262.0K0.00%−861−6.5%Reduced
Farther Finance Advisors, LLC12,005$253.7K0.00%−13−0.1%Reduced
Manufacturers Life Insurance Company, The11,222$237.1K0.00%+314+2.9%Added
Arizona State Retirement System10,593$223.8K0.00%−93−0.9%Reduced
Gray Private Wealth, LLC10,588$223.7K0.10%00.0%Unchanged
Great Oak Capital Partners, LLC10,636$223.6K0.05%00.0%Unchanged
Sequoia Financial Advisors, LLC10,580$223.6K0.00%+10,580New
CI Private Wealth, LLC10,441$220.6K0.00%+10,441New
Cambridge Investment Research Advisors, Inc.10,365$219.0K0.00%00.0%Unchanged
Barrett & Company, Inc.10,000$211.3K0.06%00.0%Unchanged
Pallas Capital Advisors LLC9,973$210.7K0.01%+18+0.2%Added
Susquehanna Portfolio Strategies, LLC9,797$207.0K0.00%−15,573−61.4%Reduced
Vanguard Investments Australia, Ltd.8,947$189.1K0.00%00.0%Unchanged
KLP Kapitalforvaltning AS8,300$175.4K0.00%00.0%Unchanged
Pension & Wealth Management Advisors, Inc.6,155$130.1K0.04%+14+0.2%Added
Larson Financial Group LLC3,803$80.4K0.00%−138−3.5%Reduced
SHP Wealth Management3,459$73.1K0.01%+3+0.1%Added
Ameritas Investment Partners, Inc.3,422$72.3K0.00%00.0%Unchanged
Tower Research Capital LLC (TRC)2,738$57.9K0.00%+657+31.6%Added
Simplex Trading, LLC1,751$37.0K0.00%+874+99.7%Added
State of Alaska, Department of Revenue1,630$34.0K0.00%00.0%Unchanged
Aquatic Capital Management LLC1,529$32.3K0.00%−56−3.5%Reduced
Rockefeller Capital Management L.P.1,527$32.3K0.00%00.0%Unchanged
EverSource Wealth Advisors, LLC1,348$28.5K0.00%+33+2.5%Added
Advisor Group Holdings, Inc.1,303$27.5K0.00%−8−0.6%Reduced
SRS Capital Advisors, Inc.1,272$26.9K0.00%+1,219+2,300.0%Added
Nisa Investment Advisors, LLC1,084$22.9K0.00%+1,066+5,922.2%Added
Sterling Capital Management LLC820$17.3K0.00%−12,512−93.8%Reduced
Stone House Investment Management, LLC818$17.3K0.00%00.0%Unchanged
Covestor Ltd517$11.0K0.01%+483+1,420.6%Added
GAMMA Investing LLC444$9.38K0.00%−109−19.7%Reduced
Signaturefd, LLC424$8.96K0.00%+377+802.1%Added
Eastern Bank288$6.08K0.00%00.0%Unchanged
STRS Ohio200$4.23K0.00%00.0%Unchanged
IFP Advisors, Inc185$3.91K0.00%+13+7.6%Added
Optiver Holding B.V.168$3.55K0.00%−4−2.3%Reduced
Essential Partners LLC143$3.02K0.00%−353−71.2%Reduced
Allworth Financial LP118$2.49K0.00%−5,848−98.0%Reduced
Picton Mahoney Asset Management114$2.41K0.00%+114New
Rothschild Investment LLC109$2.30K0.00%−59−35.1%Reduced
Minot DeBlois Advisors LLC85$1.80K0.00%+85New
Silver Grove Financial Group, Inc.85$1.80K0.00%+85New
The PNC Financial Services Group, Inc.57$1.20K0.00%00.0%Unchanged
Smartleaf Asset Management LLC56$1.19K0.00%00.0%Unchanged
US Bancorp50$1.06K0.00%−3−5.7%Reduced
American Capital Advisory, LLC50$1.06K0.00%00.0%Unchanged
Quarry LP23$4860.00%−10−30.3%Reduced
UMA Financial Services, Inc.17$3600.00%+17New
Parallel Advisors, LLC15$3170.00%−24−61.5%Reduced
Caitong International Asset Management Co., Ltd6$1270.00%−6−50.0%Reduced
True Wealth Design, LLC2$430.00%00.0%Unchanged
Clearstead Advisors, LLC1$220.00%+1New
Wellington Management Group LLP0$00.00%−710,000−100.0%Sold out
Jane Street Group, LLC0$00.00%−60,669−100.0%Sold out
OP Asset Management Ltd0$00.00%−58,392−100.0%Sold out
Lazard Asset Management LLC0$00.00%−57,302−100.0%Sold out
Susquehanna International Group, LLP0$00.00%−51,593−100.0%Sold out
Integrated Quantitative Investments LLC0$00.00%−37,075−100.0%Sold out
Connor, Clark & Lunn Investment Management Ltd.0$00.00%−32,249−100.0%Sold out
Susquehanna Fundamental Investments, LLC0$00.00%−27,840−100.0%Sold out
Los Angeles Capital Management LLC0$00.00%−25,375−100.0%Sold out
Four Tree Island Advisory LLC0$00.00%−25,011−100.0%Sold out
Martingale Asset Management L P0$00.00%−23,900−100.0%Sold out
Polymer Capital Management (US) LLC0$00.00%−17,866−100.0%Sold out
Universal- Beteiligungs- und Servicegesellschaft mbH0$00.00%−16,846−100.0%Sold out
Diversified Trust Co0$00.00%−13,194−100.0%Sold out
Brevan Howard Capital Management LP0$00.00%−10,703−100.0%Sold out
Quantbot Technologies LP0$00.00%−10,536−100.0%Sold out
Intech Investment Management LLC0$00.00%−9,892−100.0%Sold out
Acadian Asset Management LLC0$00.00%−9,040−100.0%Sold out
Globeflex Capital L P0$00.00%−6,791−100.0%Sold out
Resources Management Corp0$00.00%−1,500−100.0%Sold out
Northwestern Mutual Wealth Management Co0$00.00%−232−100.0%Sold out
MAI Capital Management0$00.00%−105−100.0%Sold out
Root Financial Partners, LLC0$00.00%−59−100.0%Sold out
Quadrant Capital Group LLC0$00.00%−57−100.0%Sold out
Versant Capital Management, Inc0$00.00%−15−100.0%Sold out
Hughes Financial Services, LLC0$00.00%−1−100.0%Sold out
Janus Henderson Group PLC––––Not filed
CWM, LLC––––Not filed
Sunbelt Securities, Inc.––––Not filed