NB Bancorp, Inc. (NBBK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

35,579,456Shares Outstanding

22,809,763Shares held by institutions

$492,918,978Value of institutional holdings

64.11%Institutional ownership %

20.34%Shares Changed QoQ

159No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

NB Bancorp, Inc. (NASDAQ:NBBK) showed up in the 13F filings of 159 institutional investors as of December 2025.

Collectively, these holders controlled 62.4% of NB Bancorp's outstanding shares in December 2025, up from 54.5% in September 2025.
They increased total shares held in NB Bancorp by 18.04% from last quarter, and the number of investors in NBBK increased 39.47% annually.
Among the 159 funds, 107 bought more NB Bancorp shares, 37 sold down, and 15 held their ground.
In total, institutional investors held 22.21Mn shares in NB Bancorp as of December 2025, up by 3.39Mn shares quarter on quarter, and up 3.27Mn shares year over year.
As of December 31, 2025, the biggest holder of NB Bancorp is BlackRock, Inc. at 3.1Mn shares, representing 8.72% of shares outstanding.
The largest buyers of NB Bancorp for the quarter ending December 2025 were AltraVue Capital, LLC (693.0K), Goldman Sachs Group Inc (662.88K), Tieton Capital Management, LLC (524.94K), VANGUARD GROUP INC (350.9K), DIMENSIONAL FUND ADVISORS LP (288.03K).
The largest sales of NBBK for the quarter ending December 2025 came from MILLENNIUM MANAGEMENT LLC (488.42K), WELLINGTON MANAGEMENT GROUP LLP (355.75K), UBS Group AG (232.26K), Jpmorgan Chase & Co (180.15K), Barclays Plc (116.1K).
According to Business Quant data, leading holders of NBBK for December 2025 are BlackRock, Inc. (3.1Mn), Pertento Partners LLP (2.34Mn), VANGUARD GROUP INC (2.3Mn), WELLINGTON MANAGEMENT GROUP LLP (1.47Mn), Goldman Sachs Group Inc (1.19Mn), State Street Corp (1.11Mn), GEODE CAPITAL MANAGEMENT, LLC (966.66K), HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC (701.99K), AltraVue Capital, LLC (693.0K), Tieton Capital Management, LLC (524.94K).

159 Institutional Holders

22,809,763 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	3,103,770	281,645	9.98%	$61,516,713.00
Pertento Partners LLP	31 Dec, 2025	2,343,776	229,440	10.85%	$46,453,640.00
VANGUARD GROUP INC	31 Dec, 2025	2,301,034	350,899	17.99%	$45,606,494.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	1,471,189	-355,750	-19.47%	$29,158,966.00
Goldman Sachs Group Inc	31 Dec, 2025	1,187,776	662,878	126.29%	$23,541,730.00
State Street Corp	31 Dec, 2025	1,114,379	-82,543	-6.90%	$22,086,992.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	966,662	90,014	10.27%	$19,162,447.00
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	31 Dec, 2025	701,992	7,010	1.01%	$13,913,481.00
AltraVue Capital, LLC	31 Dec, 2025	693,000	693,000	0.00%	$13,735,260.00
Tieton Capital Management, LLC	31 Dec, 2025	524,935	524,935	0.00%	$10,404.00
FMR LLC	31 Dec, 2025	383,212	58,532	18.03%	$7,595,263.00
Nuveen, LLC	31 Dec, 2025	346,779	238,035	218.89%	$6,873,159.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	329,398	41,943	14.59%	$6,528,668.00
Northern Trust Corp	31 Dec, 2025	324,313	14,614	4.72%	$6,427,883.00
Empowered Funds, LLC	31 Dec, 2025	306,300	226,488	283.78%	$6,070,866.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	288,028	288,028	0.00%	$5,708,814.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	254,219	213,489	524.16%	$5,038,621.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	252,845	46,976	22.82%	$5,011,388.00
MARSHALL WACE, LLP	31 Dec, 2025	251,512	-25,588	-9.23%	$4,984,968.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	251,274	140,374	126.58%	$4,980,251.00

1 - 20 of 159

Research Tools