NB Bancorp, Inc. 13F holders
161 funds reported a position in NB Bancorp, Inc. in their 13F for the quarter ended 30 June 2026, together 22.5 million shares worth $475.8 million. Against the quarter before, 11 opened a position, 66 added, 48 trimmed and 26 sold out; together they sold a net 567,405 shares. The largest holders: BlackRock, Inc., Vanguard Capital Management LLC and AltraVue Capital, LLC.
Funds holding161-16 on Q1 2026
Shares they held22.5Mworth $475.8 million
Net sold on the quarter567,405 sharesabout $12.0 million at the funds' values
Funds buying to selling77 to 74opened or added, to cut or sold
Opened 11Added 66Held 35Trimmed 48Sold out 26
What each fund did in NBBK against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in NBBK in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 30 reported a position in NB Bancorp, Inc.: 4 opened one, 8 added, 2 trimmed and 2 sold out, a net 258,433 shares bought.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| International Assets Investment Management, LLC | +241,897 | 372,910 | added | 13F |
| Sterling Capital Management LLC | +13,159 | 13,979 | added | 13F |
| Y-Intercept (Hong Kong) Ltd | +6,719 | 61,260 | added | 13F |
| Hennessy Advisors Inc. | -6,000 | 172,000 | trimmed | 13F |
| Cullen/Frost Bankers, Inc. | +2,586 | 2,586 | new | 13F |
| Wedge Capital Management L L P | +1,999 | 45,215 | added | 13F |
| Lynch & Associates | -1,750 | 48,584 | trimmed | 13F |
| SJS Investment Consulting Inc. | +209 | 209 | new | 13F |
| Farther Finance Advisors, LLC | +163 | 12,168 | added | 13F |
| Parkside Financial Bank & Trust | +150 | 150 | new | 13F |
| Signaturefd, LLC | +90 | 514 | added | 13F |
| Gamma Investing LLC | +20 | 464 | added | 13F |
| Assetmark, Inc. | +14 | 14 | new | 13F |
| Essential Partners LLC | +1 | 144 | added | 13F |
| Caitong International Asset Management Co., Ltd | -6 | 0 | sold out | 13F |
| Stone House Investment Management, LLC | -818 | 0 | sold out | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in NB Bancorp, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 1.2 million shares worth $24.4 million, 0.0% of its reported book. In the quarter, 3 funds added or opened a position and 3 trimmed or sold out; together they sold a net 16,732 shares, about $353,547 at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 1,153,217 | $24.4 million | 0.0% | +54,287 | added | 30 June 2026 | 13F |
| FMR LLC | 497,305 | $10.5 million | 0.0% | +59,580 | added | 30 June 2026 | 13F |
| Citadel Advisors | 289,814 | $6.1 million | 0.0% | +173,443 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 277,027 | $5.9 million | 0.0% | -94,780 | trimmed | 30 June 2026 | 13F |
| Renaissance Technologies | 131,440 | $2.8 million | 0.0% | -132,466 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 81,447 | $1.7 million | 0.0% | -76,796 | trimmed | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 3,331,544 | 14.80% | $70.4 million | 0.00% | +247,322 | 13F |
| Vanguard Capital Management LLC | 1,670,835 | 7.42% | $35.3 million | 0.00% | -33,093 | 13F |
| AltraVue Capital, LLC | 1,655,108 | 7.35% | $35.0 million | 2.52% | +351,028 | 13F |
| Pertento Partners LLP | 1,475,770 | 6.55% | $31.2 million | 2.24% | -730,896 | 13F |
| State Street Corp. | 1,471,766 | 6.54% | $31.1 million | 0.00% | +178,228 | 13F |
| Geode Capital Management, LLC | 1,153,217 | 5.12% | $24.4 million | 0.00% | +54,287 | 13F |
| Dimensional Fund Advisors LP | 753,320 | 3.35% | $15.9 million | 0.00% | +230,936 | 13F |
| Goldman Sachs Group Inc. | 571,954 | 2.54% | $12.1 million | 0.00% | -119,714 | 13F |
| Tieton Capital Management, LLC | 546,600 | 2.43% | $11.6 million | 3.32% | -6,970 | 13F |
| Hotchkis & Wiley Capital Management LLC | 501,172 | 2.23% | $10.6 million | 0.03% | +50,400 | 13F |
| Nuveen, LLC | 498,869 | 2.22% | $10.5 million | 0.00% | +10,836 | 13F |
| FMR LLC | 497,305 | 2.21% | $10.5 million | 0.00% | +59,580 | 13F |
| Vanguard Portfolio Management LLC | 397,046 | 1.76% | $8.4 million | 0.00% | +10,914 | 13F |
| Legato Capital Management LLC | 366,090 | 1.63% | $7.7 million | 0.64% | +90,020 | 13F |
| Northern Trust Corp. | 360,492 | 1.60% | $7.6 million | 0.00% | +25,132 | 13F |
| New York State Common Retirement Fund | 346,155 | 1.54% | $7.3 million | 0.01% | +85,570 | 13F |
| Charles Schwab Investment Management Inc. | 318,612 | 1.42% | $6.7 million | 0.00% | +247 | 13F |
| Citadel Advisors LLC | 289,814 | 1.29% | $6.1 million | 0.00% | +173,443 | 13F |
| Two Sigma Investments, LP | 277,027 | 1.23% | $5.9 million | 0.01% | -94,780 | 13F |
| American Century Companies Inc. | 261,866 | 1.16% | $5.5 million | 0.00% | -1,790 | 13F |
| Vanguard Fiduciary Trust Co. | 253,951 | 1.13% | $5.4 million | 0.00% | -87 | 13F |
| Morgan Stanley | 229,194 | 1.02% | $4.8 million | 0.00% | -50,676 | 13F |
| Bridgeway Capital Management, LLC | 221,399 | 0.98% | $4.7 million | 0.08% | +13,005 | 13F |
| Empowered Funds, LLC | 181,399 | 0.81% | $3.8 million | 0.02% | +13,005 | 13F |
| Hennessy Advisors Inc. | 178,000 | 0.79% | $3.8 million | 0.12% | -2,000 | 13F |
| Bank of New York Mellon Corp | 171,541 | 0.76% | $3.6 million | 0.00% | +23,475 | 13F |
| D. E. Shaw & Co., Inc. | 149,931 | 0.67% | $3.2 million | 0.00% | +79,546 | 13F |
| Sei Investments Co. | 142,346 | 0.63% | $3.0 million | 0.00% | -159,835 | 13F |
| First Trust Advisors LP | 142,253 | 0.63% | $3.0 million | 0.00% | +1,989 | 13F |
| UBS Group AG | 140,405 | 0.62% | $3.0 million | 0.00% | +64,285 | 13F |
| International Assets Investment Management, LLC | 131,013 | 0.58% | $2.8 million | 0.17% | no change | 13F |
| Renaissance Technologies LLC | 131,440 | 0.58% | $2.8 million | 0.00% | -132,466 | 13F |
| AllianceBernstein L.P. | 130,219 | 0.58% | $2.7 million | 0.00% | no change | 13F |
| Panagora Asset Management Inc. | 129,355 | 0.57% | $2.7 million | 0.01% | -20,741 | 13F |
| Qube Research & Technologies Ltd | 127,236 | 0.57% | $2.7 million | 0.00% | -47,830 | 13F |
| Financial Engines Advisors L.L.C. | 126,788 | 0.56% | $2.7 million | 0.01% | +1,065 | 13F |
| Marshall Wace, LLP | 123,112 | 0.55% | $2.6 million | 0.00% | new | 13F |
| AQR Capital Management LLC | 116,349 | 0.52% | $2.5 million | 0.00% | -12,472 | 13F |
| Mangrove Partners Im, LLC | 111,356 | 0.49% | $2.4 million | 0.15% | no change | 13F |
| Invesco Ltd. | 97,941 | 0.44% | $2.1 million | 0.00% | -3,303 | 13F |
| Oppenheimer & Close, LLC | 82,999 | 0.37% | $1.8 million | 1.11% | no change | 13F |
| Millennium Management LLC | 81,447 | 0.36% | $1.7 million | 0.00% | -76,796 | 13F |
| Swiss National Bank | 77,100 | 0.34% | $1.6 million | 0.00% | no change | 13F |
| Credit Agricole S A | 70,000 | 0.31% | $1.5 million | 0.00% | no change | 13F |
| Mackenzie Financial Corp. | 67,441 | 0.30% | $1.4 million | 0.00% | +16,544 | 13F |
| Creative Planning | 67,320 | 0.30% | $1.4 million | 0.00% | -3,586 | 13F |
| Round Rock Advisors LLC | 66,530 | 0.30% | $1.4 million | 0.18% | +63 | 13F |
| Focus Partners Wealth | 65,728 | 0.29% | $1.4 million | 0.00% | -27,081 | 13F |
| Raffles Associates LP | 63,748 | 0.28% | $1.3 million | 0.59% | +48,874 | 13F |
| BNP Paribas Financial Markets | 62,478 | 0.28% | $1.3 million | 0.00% | +9,473 | 13F |
The 50 largest of the 161 funds that reported a position in NBBK in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on NBBK
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 42,100 | $889,573 | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 23,200 | $490,216 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 15 May 2026 | 13G/A | Pertento Partners LLP and 5 others | 2.0 million | 4.6% | 31 March 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 13 February 2026 | 13G | Needham Bank Employee Stock Ownership Plan Trust and 1 other | 3.4 million | 7.5% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 30 January 2026 | 13G | The Vanguard Group and 1 other | 2.3 million | 5.0% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 5 December 2025 | 13G/A | Pertento Partners LLP and 5 others | 2.3 million | 5.1% | 1 December 2025 | passive, under 20% (13d-1(c)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 22 September 2026 | 30 | $22.74 | SEC |
| 17 September 2026 | 65 | $22.73 | SEC |
| 10 September 2026 | 1 | $22.88 | SEC |
| 27 August 2026 | 782 | $22.30 | SEC |
| 25 August 2026 | 78 | $22.51 | SEC |
| 20 August 2026 | 2,650 | $21.90 | SEC |
| 19 August 2026 | 507 | $22.74 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.