NB Bancorp, Inc. NBBK
CIK 0001979330 · CUSIP 63945M107
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $49.81M 2,822,125 shares | 0.00% | -59.23K(-2.10%)Reduced | SEC filing ↗ Nov 12, 2025 | ▾ |
| 02 | Pertento Partners LLP CIK 1894571 · View history | $37.32M 2,114,336 shares | 4.55% | 0(0.00%)Unchanged | SEC filing ↗ Nov 13, 2025 | ▾ |
| 03 | VANGUARD GROUP INC CIK 102909 · View history | $34.42M 1,950,135 shares | 0.00% | -31.86K(-1.60%)Reduced | SEC filing ↗ Nov 7, 2025 | ▾ |
| 04 | WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history | $32.25M 1,826,939 shares | 0.01% | -33.65K(-1.80%)Reduced | SEC filing ↗ Nov 14, 2025 | ▾ |
| 05 | STATE STREET CORP CIK 93751 · View history | $21.13M 1,196,922 shares | 0.00% | +76.26K(+6.80%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 06 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $15.48M 876,648 shares | 0.00% | -6.49K(-0.70%)Reduced | SEC filing ↗ Nov 12, 2025 | ▾ |
| 07 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC CIK 1164833 · View history | $12.27M 694,982 shares | 0.04% | +148.47K(+27.20%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 08 | MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history | $9.59M 543,282 shares | 0.01% | -99.79K(-15.50%)Reduced | SEC filing ↗ Nov 14, 2025 | ▾ |
| 09 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $9.26M 524,898 shares | 0.00% | +50.14K(+10.60%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 10 | UBS Group AG CIK 1610520 · View history | $6.68M 378,353 shares | 0.00% | +274.51K(+264.40%)Added | SEC filing ↗ Nov 13, 2025 | ▾ |
| 11 | FMR LLC CIK 315066 · View history | $5.73M 324,680 shares | 0.00% | +23.40K(+7.80%)Added | SEC filing ↗ Nov 13, 2025 | ▾ |
| 12 | NORTHERN TRUST CORP CIK 73124 · View history | $5.47M 309,699 shares | 0.00% | -7.06K(-2.20%)Reduced | SEC filing ↗ Nov 14, 2025 | ▾ |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history | $5.07M 287,455 shares | 0.00% | -11.53K(-3.90%)Reduced | SEC filing ↗ Nov 10, 2025 | ▾ |
| 14 | MARSHALL WACE, LLP CIK 1318757 · View history | $4.89M 277,100 shares | 0.01% | -38.36K(-12.20%)Reduced | SEC filing ↗ Nov 13, 2025 | ▾ |
| 15 | TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history | $3.63M 205,869 shares | 0.01% | +64.64K(+45.80%)Added | SEC filing ↗ Nov 14, 2025 | ▾ |
| 16 | HENNESSY ADVISORS INC CIK 1145255 · View history | $3.27M 185,000 shares | 0.11% | +5.00K(+2.80%)Added | SEC filing ↗ Oct 20, 2025 | ▾ |
| 17 | EJF Capital LLC CIK 1353254 · View history | $3.05M 172,803 shares | 1.77% | +4.97K(+3.00%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
| 18 | PANAGORA ASSET MANAGEMENT INC CIK 883677 · View history | $3.05M 172,662 shares | 0.01% | -52.92K(-23.50%)Reduced | SEC filing ↗ Nov 13, 2025 | ▾ |
| 19 | PROSPECTOR PARTNERS LLC CIK 1080380 · View history | $2.66M 150,862 shares | 0.32% | -16.76K(-10.00%)Reduced | SEC filing ↗ Nov 7, 2025 | ▾ |
| 20 | AMERICAN CENTURY COMPANIES INC CIK 748054 · View history | $2.42M 137,313 shares | 0.00% | +75.38K(+121.70%)Added | SEC filing ↗ Nov 12, 2025 | ▾ |
Showing 20 / 146 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 146 reporting institutions.
This page includes 20 of 146 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 146 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"63945M107","quarter":"2025Q3","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.