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Disclosery

NBBK NB BANCORP INC

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COM (common), issuer CIK 1979330

169 managers (177 13F filers) reported a position in NBBK shares at 2026-03-31, 23,086,628 shares in all. 26 filers opened a position and 17 filers sold out during the quarter.

Managers
169
13F filers
177
New
26
Added
66
Reduced
44
Sold out
17
Shares held by filers
23,086,628

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.3,084,222$65M<0.01%-19,54813F-HRTimelineGroup
VANGUARD GROUP INCgroup of 6 filers holding2,400,043$50.6MnewTimeline
Pertento Partners LLPin group Pertento Partners LLP2,206,666$46.5M4.93%-137,11013F-HRTimelineGroup
AltraVue Capital, LLC1,304,080$27.5M2.37%+611,08013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,293,538$27.3M<0.01%+179,15913F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,098,930$23.2M<0.01%+132,26813F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…710,000$15M<0.01%-761,18913F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC691,668$14.6M<0.01%+97,78013F-HRTimelineGroup
Tieton Capital Management, LLC553,570$11.7M3.91%+28,63513F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP522,384$11M<0.01%+234,35613F-HRTimelineGroup
Nuveen, LLCin group TIAA488,033$10.3M<0.01%+141,25413F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC450,772$9.5M0.03%-251,22013F-HRTimeline
FMR LLCin group FMR LLC437,725$9.22M<0.01%+54,51313F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP371,807$7.83M0.01%+118,96213F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP335,360$7.07M<0.01%+11,04713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co318,365$6.71M<0.01%-11,03313F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO302,181$6.37M0.01%+158,39713F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY279,870$5.9M<0.01%+37,73813F-HRTimelineGroup
Legato Capital Management LLC276,070$5.82M0.53%+104,70913F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC263,906$5.56M0.01%+12,63213F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC263,656$5.56M<0.01%+41,80113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND260,585$5.49M0.01%+116,20013F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC208,394$4.39M0.09%+15,24413F-HRTimeline
HENNESSY ADVISORS INC180,000$3.79M0.14%-1,00013F-HRTimeline
Qube Research & Technologies Ltd175,066$3.69M0.01%+157,71413F-HRTimeline
Empowered Funds, LLC168,394$3.55M0.02%+15,24413F-HR/ATimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC158,243$3.33M<0.01%+103,37713F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC150,096$3.16M0.01%-29513F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp148,066$3.12M<0.01%-1,15513F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP140,264$2.96M<0.01%-1,82313F-HRTimelineGroup
INTERNATIONAL ASSETS INVESTMENT MANAGEM…131,013$2.78M0.19%+44,11313F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC128,821$2.71M<0.01%+23,81013F-HRTimelineGroup
Financial Engines Advisors L.L.C.125,723$2.65M0.01%+8,01613F-HRTimeline
ALLIANCEBERNSTEIN L.P.130,219$2.58M<0.01%-124,00013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/118,801$2.5M<0.01%+28,16013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC116,371$2.45M<0.01%+9,91413F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding115,482$2.43M-69,804Timeline
MANGROVE PARTNERS IM, LLC111,356$2.35M0.19%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding104,803$2.21M+50,411Timeline
Invesco Ltd.in group Invesco Ltd.101,244$2.13M<0.01%+37,90713F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth92,809$1.96M<0.01%+1,44313F-HRTimelineGroup
Oppenheimer & Close, LLC82,999$1.75M1.1%013F-HRTimeline
Swiss National Bank77,100$1.62M<0.01%013F-HRTimeline
Creative Planningin group Creative Planning70,906$1.49M<0.01%+18,41113F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.70,385$1.48M<0.01%+24,61913F-HRTimelineGroup
CREDIT AGRICOLE S Ain group CREDIT AGRICOLE S A70,000$1.47M<0.01%new13F-HRTimelineGroup
Round Rock Advisors LLC66,467$1.4M0.21%+14,56113F-HRTimeline
STILWELL VALUE LLCin group STILWELL VALUE LLC65,000$1.37M0.82%013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC60,669$1.28M<0.01%-20,97213F-HRTimelineGroup
OP Asset Management Ltd58,392$1.23M0.01%new13F-HR/ATimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC57,302$1.21M<0.01%+5,14213F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC55,364$1.17M<0.01%-9,10513F-HRTimelineGroup
LYNCH & ASSOCIATES/IN53,334$1.12M0.21%-1,00013F-HRTimeline
RHUMBLINE ADVISERS53,175$1.12M<0.01%+96413F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc53,008$1.12M<0.01%-7,60813F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS53,005$1.12M<0.01%-17,87413F-HRTimelineGroup
MACKENZIE FINANCIAL CORP50,897$1.07M<0.01%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC49,495$1.04M<0.01%+13,12913F-HRTimelineGroup
NIXON PEABODY TRUST CO48,516$1.02M0.08%013F-HRTimeline
Integrated Wealth Concepts LLC47,927$1.01M0.01%+33113F-HRTimeline
WEDGE CAPITAL MANAGEMENT L L P/NC42,356$892K0.02%new13F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC41,959$884K<0.01%-36,64113F-HR/ATimelineGroup
EJF Capital LP41,457$873K0.62%-133,52213F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/41,072$866K<0.01%+1,57913F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …40,276$849K<0.01%+21,41013F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd39,782$838K0.01%new13F-HRTimelineGroup
Aviance Capital Partners, LLC37,167$783K0.09%013F-HRTimeline
Integrated Quantitative Investments LLC37,075$781K0.14%-3,86913F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,797$754K<0.01%-29613F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO36,088$746K<0.01%-23,12513F-HR/ATimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.33,899$714K<0.01%-33813F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC33,451$705K<0.01%+10,56613F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…32,249$679K<0.01%+12,49013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\31,106$655K<0.01%+6,08113F-HRTimelineGroup
Rafferty Asset Management, LLC29,998$632K<0.01%+5,80213F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …29,474$626K<0.01%new13F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources27,270$575K<0.01%new13F-HRTimelineGroup
LPL Financial LLC26,360$555K<0.01%+2,03213F-HRTimeline
Quantinno Capital Management LP25,941$547K<0.01%+2,62013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC25,375$535K<0.01%-64,99513F-HRTimeline
Four Tree Island Advisory LLC25,011$527K0.27%+3,55513F-HRTimeline
NORTHEAST INVESTMENT MANAGEMENT25,000$527K0.02%+2,00013F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD24,386$514K<0.01%-2,25513F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P23,900$504K0.01%+12,20013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC23,099$487K<0.01%-47,67313F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…22,806$481K<0.01%-31613F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC22,492$474K<0.01%+99613F-HRTimeline
Investment Advisory Group, LLC20,000$421K0.11%013F-HRTimeline
&PARTNERS19,730$416K<0.01%-10013F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…18,693$394K<0.01%+14313F-HRTimelineGroup
Polymer Capital Management (US) LLC17,866$376K0.06%new13F-HRTimeline
Kestra Advisory Services, LLCgroup of 2 filers holding17,731$374K-4,294Timeline
Cerity Partners LLCin group Cerity Partners LLC17,388$366K<0.01%new13F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…16,976$358K<0.01%+7,30013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …16,846$355K<0.01%013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN16,157$340K<0.01%-29,26213F-HR/ATimelineGroup
ROCKLAND TRUST CO15,969$336K0.01%013F-HRTimeline
Summit Wealth Group, LLC15,340$323K0.07%013F-HRTimeline
Flywheel Private Wealth LLC15,000$316K0.18%new13F-HRTimeline
RAFFLES ASSOCIATES LP14,874$313K0.27%-13,50013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson14,800$312K<0.01%013F-HR/ATimelineGroup
ExodusPoint Capital Management, LP14,437$304K<0.01%-6,52613F-HRTimeline
Bleakley Financial Group, LLC13,563$286K<0.01%-10213F-HRTimeline
Sterling Capital Management LLC13,332$281K0.01%+11,03213F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA13,268$280K<0.01%+86813F-HRTimelineGroup
DIVERSIFIED TRUST CO13,194$278K0.01%+91013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…12,171$256K<0.01%new13F-HRTimelineGroup
Farther Finance Advisors, LLC12,018$255K<0.01%+1613F-HRTimeline
AFG FIDUCIARY SERVICES LIMITED PARTNERS…11,693$255K0.16%+72313F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV11,703$247K<0.01%-4,99513F-HRTimeline
GREAT OAK CAPITAL PARTNERS, LLC10,636$236K0.05%013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …10,908$230K<0.01%-1,44613F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…10,703$226K<0.01%new13F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM10,686$225K<0.01%-14113F-HRTimeline
Gray Private Wealth, LLC10,588$223K0.11%013F-HRTimeline
Quantbot Technologies LP10,536$222K0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…10,491$221K<0.01%013F-HRTimeline
Cambridge Investment Research Advisors,…10,365$218K<0.01%-10013F-HRTimeline
SG Americas Securities, LLC10,024$211K<0.01%-3,06513F-HRTimeline
BARRETT & COMPANY, INC.10,000$211K0.07%013F-HRTimeline
Harbor Advisors LLC10,000$211K0.03%013F-HRTimeline
Pallas Capital Advisors LLC9,955$210K0.01%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC9,947$210K<0.01%new13F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC9,892$208K<0.01%-4,37413F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC9,040$190K<0.01%-6,67713F-HRTimelineGroup
KLP KAPITALFORVALTNING AS8,300$175K<0.01%013F-HRTimeline
GLOBEFLEX CAPITAL L P6,791$143K0.02%new13F-HRTimeline
PENSION & WEALTH MANAGEMENT ADVISORS, I…6,141$129K0.04%+4,00613F-HRTimeline
Allworth Financial LP5,966$126K<0.01%+13113F-HRTimeline
CWM, LLCin group CWM, LLC4,743$99.9K<0.01%+1,10113F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…4,344$91.5K<0.01%013F-HRTimelineGroup
Larson Financial Group LLC3,941$83K<0.01%+31213F-HRTimeline
SHP Wealth Management3,456$72.8K0.01%+213F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,422$72.1K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,081$43.8K<0.01%-43513F-HRTimelineGroup
State of Alaska, Department of Revenue1,630$34K<0.01%013F-HRTimeline
Aquatic Capital Management LLC1,585$33.4K<0.01%+1,06613F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…1,527$32.2K<0.01%013F-HRTimelineGroup
RESOURCES MANAGEMENT CORP /CT/ /ADV1,500$32K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,315$27.7K<0.01%+2913F-HR/ATimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.1,311$27.6K<0.01%013F-HRTimelineGroup
SIMPLEX TRADING, LLC877$18.5K<0.01%new13F-HRTimeline
Stone House Investment Management, LLC818$17.2K<0.01%new13F-HRTimeline
GAMMA Investing LLC553$11.7K<0.01%+5413F-HRTimeline
Essential Partners LLC496$10.5K<0.01%+213F-HRTimeline
EASTERN BANK288$6.07K<0.01%013F-HRTimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…232$4.89K<0.01%+22613F-HRTimelineGroup
STRS OHIO200$4.21K<0.01%013F-HRTimeline
IFP Advisors, Inc172$3.62K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.172$3.62K<0.01%-4013F-HR/ATimelineGroup
ROTHSCHILD INVESTMENT LLC168$3.54K<0.01%+8113F-HRTimeline
MAI Capital Management105$2.21K<0.01%new13F-HRTimeline
Root Financial Partners, LLC59$1.24K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…57$1.2K<0.01%013F-HRTimelineGroup
QUADRANT CAPITAL GROUP LLC57$1.2K<0.01%013F-HR/ATimeline
Smartleaf Asset Management LLC56$1.16K<0.01%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\53$1.12K<0.01%new13F-HRTimelineGroup
Arax Advisory Partners53$1.12K<0.01%+5113F-HRTimeline
American Capital Advisory, LLC50$1.05K<0.01%013F-HRTimeline
Covestor Ltd34$1K<0.01%-9413F-HRTimeline
SIGNATUREFD, LLC47$990<0.01%new13F-HRTimeline
Parallel Advisors, LLC39$822<0.01%013F-HR/ATimeline
Quarry LP33$695<0.01%-8213F-HRTimeline
NISA INVESTMENT ADVISORS, LLC18$379<0.01%013F-HRTimeline
Versant Capital Management, Inc15$316<0.01%new13F-HRTimeline
Caitong International Asset Management …12$253<0.01%new13F-HRTimeline
Sunbelt Securities, Inc.5$105<0.01%013F-HRTimeline
True Wealth Design, LLC2$43<0.01%013F-HRTimeline
Hughes Financial Services, LLC1$21<0.01%new13F-HRTimeline