NB BANCORP INC NBBK

US Financials Savings Institutions, Not Federally Chartered
$21.14
-2.2%
52w: $16.03 – $22.56

Latest 13F among current holders filed 19 days ago (Jun 16, 2026)

Price — last 12 months

research preview data
16.0319.3022.56
Jun 20, 2025 Jul 2, 2026
Institutional holders
176
+13 QoQ
13F value
$486.2M
+10.2% QoQ
Smart-money holders
10
signal tier ≥ 2
New smart buyers
0
Q1 2026
Options barometer
13.9×
$3.6M calls / $257K puts

Institutional value by quarter

$139.3M
Q1 2024
$254.6M
Q2 2024
$352.5M
Q3 2024
$328.3M
Q4 2024
$331.5M
Q1 2025
$334.7M
Q2 2025
$340.9M
Q3 2025
$441.3M
Q4 2025
$486.2M
Q1 2026

Number of holders

57
Q1 2024
93
Q2 2024
109
Q3 2024
115
Q4 2024
123
Q1 2025
132
Q2 2025
145
Q3 2025
163
Q4 2025
176
Q1 2026

Who owns NBBK?

Q1 2026 filings
FundTypeSharesValue% of fundChange
BlackRock, Inc. Index provider3.1M$65.0M0.0%-0.6%
Pertento Partners LLP ★3Fundamental concentrated2.2M$46.5M4.9%-5.8%
VANGUARD CAPITAL MANAGEMENT LLC Diversified mechanical1.7M$35.9M0.0%
AltraVue Capital, LLC ★3Fundamental concentrated1.3M$27.5M2.4%+88.2%
STATE STREET CORP Index provider1.3M$27.3M0.0%+16.1%
GEODE CAPITAL MANAGEMENT, LLC Index provider1.1M$23.2M0.0%+13.7%
WELLINGTON MANAGEMENT GROUP LLP Long only active710.0K$15.0M0.0%-51.7%
GOLDMAN SACHS GROUP INC Bank broker691.7K$14.6M0.0%+16.5%
Tieton Capital Management, LLC ★2Fundamental diversified553.6K$11.7M3.9%+5.5%
DIMENSIONAL FUND ADVISORS LP Quant stat arb522.4K$11.0M0.0%+81.4%
Nuveen, LLC Diversified mechanical488.0K$10.3M0.0%+40.7%
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Other450.8K$9.5M0.0%-35.8%
FMR LLC Long only active437.7K$9.2M0.0%+14.2%
VANGUARD PORTFOLIO MANAGEMENT LLC Diversified mechanical386.1K$8.1M0.0%
TWO SIGMA INVESTMENTS, LP Quant stat arb371.8K$7.8M0.0%+47.0%
NORTHERN TRUST CORP Index provider335.4K$7.1M0.0%+3.4%
CHARLES SCHWAB INVESTMENT MANAGEMENT INC Index provider318.4K$6.7M0.0%-3.3%
SEI INVESTMENTS CO Diversified mechanical302.2K$6.4M0.0%+110.2%
MORGAN STANLEY Bank broker279.9K$5.9M0.0%+15.6%
Legato Capital Management LLC Other276.1K$5.8M0.5%+61.1%
RENAISSANCE TECHNOLOGIES LLC Quant stat arb263.9K$5.6M0.0%+5.0%
AMERICAN CENTURY COMPANIES INC Diversified mechanical263.7K$5.6M0.0%+18.8%
NEW YORK STATE COMMON RETIREMENT FUND Diversified mechanical260.6K$5.5M0.0%+80.5%
VANGUARD FIDUCIARY TRUST CO Diversified mechanical254.0K$5.4M0.0%
BRIDGEWAY CAPITAL MANAGEMENT, LLC Diversified mechanical208.4K$4.4M0.1%+7.9%
HENNESSY ADVISORS INC Other180.0K$3.8M0.1%-0.6%
Qube Research & Technologies Ltd Quant stat arb175.1K$3.7M0.0%+908.9%
Empowered Funds, LLC Diversified mechanical168.4K$3.5M0.0%+10.0%
MILLENNIUM MANAGEMENT LLC Multistrat pod158.2K$3.3M0.0%+188.4%
PANAGORA ASSET MANAGEMENT INC Diversified mechanical150.1K$3.2M0.0%-0.2%
Bank of New York Mellon Corp Diversified mechanical148.1K$3.1M0.0%-0.8%
FIRST TRUST ADVISORS LP Index provider140.3K$3.0M0.0%-1.3%
INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC Diversified mechanical131.0K$2.8M0.2%+50.8%
AQR CAPITAL MANAGEMENT LLC Quant stat arb128.8K$2.7M0.0%+22.7%
Financial Engines Advisors L.L.C. Wealth advisor125.7K$2.6M0.0%+6.8%
ALLIANCEBERNSTEIN L.P. Long only active130.2K$2.6M0.0%-48.8%
BANK OF AMERICA CORP /DE/ Bank broker118.8K$2.5M0.0%+31.1%
CITADEL ADVISORS LLC Multistrat pod116.4K$2.5M0.0%+9.3%
MANGROVE PARTNERS IM, LLC Quant stat arb111.4K$2.3M0.2%Held
Invesco Ltd. Index provider101.2K$2.1M0.0%+59.8%
Focus Partners Wealth Wealth advisor92.8K$2.0M0.0%+1.6%
Oppenheimer & Close, LLC ★2Fundamental diversified83.0K$1.7M1.1%Held
Swiss National Bank Index provider77.1K$1.6M0.0%Held
UBS Group AG Bank broker76.1K$1.6M0.0%-47.9%
Creative Planning Wealth advisor70.9K$1.5M0.0%+35.1%
D. E. Shaw & Co., Inc. Quant stat arb70.4K$1.5M0.0%+53.8%
CREDIT AGRICOLE S A Diversified mechanical70.0K$1.5M0.0%New
Round Rock Advisors LLC Wealth advisor66.5K$1.4M0.2%+28.1%
STILWELL VALUE LLC ★3Fundamental concentrated65.0K$1.4M0.8%Held
JANE STREET GROUP, LLC Market maker60.7K$1.3M0.0%-25.7%

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