As of November 6, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of California BanCorp. The largest reported stake is Wellington Management Group LLP's, at 7.6%. 10 filings are on record since November 12, 2025 (Schedule 13G/A, August 13, 2026).
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Key facts
- · Reporting person: AllianceBernstein L.P. · Sole voting: 1,952,131 · Shared voting: 0 · Sole dispositive: 1,952,131 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Wellington Management Group LLP · Sole voting: 0 · Shared voting: 1,828,948 · Sole dispositive: 0 · Shared dispositive: 2,447,278 · SCHEDULE 13G/A, 2026-08-13
- · Reporting person: BlackRock, Inc. · Sole voting: 1,767,526 · Shared voting: 0 · Sole dispositive: 1,790,663 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-27
- · Holder: AllianceBernstein L.P. · Percent: 7.3% · SCHEDULE 13G/A
- · Holder: Endeavour Capital Advisors Inc. · Percent: 5.4% · SCHEDULE 13G/A
California BanCorp has 10 Schedule 13D or 13G filings on record since 2025-11-12. 5 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Wellington Management Group LLP | 7.6% | 2,447,278 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
| FJ Capital Management LLC | 6.34% | 2,054,534 | SCHEDULE 13G, 2026-01-29 | 2026-01-29 |
| AllianceBernstein L.P. | 6.1% | 1,952,131 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| BlackRock, Inc. | 5.6% | 1,790,663 | SCHEDULE 13G, 2026-07-27 | 2026-06-30 |
| Endeavour Capital Advisors Inc. | 5.4% | 1,755,219 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| Castle Creek Capital Partners VI, LP | 4.7% | 1,522,105 | SCHEDULE 13G/A, 2026-02-10 | 2025-12-31 |
| Fourthstone LLC | 4% | 1,301,394 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
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More on California BanCorp and the records around it.
California BanCorp elsewhere on the record
Companies that share a holder
- Castle Creek Capital Partners VI, LP also filed stake reports on 2 other companies: MIDDLEFIELD BANC CORP. (Feb 2026)
- Endeavour Capital Advisors Inc. also filed stake reports on 5 other companies: FVCBankcorp, Inc. (Aug 2026), USCB Financial Holdings, Inc. (Feb 2026), AVIDBANK HOLDINGS, INC. (Nov 2025)
- FJ Capital Management LLC also filed stake reports on 14 other companies: Equity Bancshares Inc. (EQBK) (Apr 2026), Chain Bridge Bancorp Inc. (Aug 2025), Citizens Community Bancorp (CZWI) (Aug 2025)
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The Short Answer
Which Company This Is
What They Do, And How The Money Works
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 0 | 1,828,948 | 0 | 2,447,278 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Group Holdings LLP | 0 | 1,828,948 | 0 | 2,447,278 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Investment Advisors Holdings LLP | 0 | 1,828,948 | 0 | 2,447,278 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Management Company LLP | 0 | 1,828,948 | 0 | 2,250,367 | SCHEDULE 13G/A, 2026-08-13 |
| AllianceBernstein L.P. | 1,952,131 | 0 | 1,952,131 | 0 | SCHEDULE 13G/A, 2026-08-14 |
| BlackRock, Inc. | 1,767,526 | 0 | 1,790,663 | 0 | SCHEDULE 13G, 2026-07-27 |
The latest filing identifies California BanCorp by CUSIP 84252A106 and gives its principal executive office as 12265 EL CAMINO REAL, SUITE 210, SAN DIEGO (SCHEDULE 13G/A, 2026-08-14).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-12 | Wellington Management Group LLP | 6.4% | SCHEDULE 13G |
| 2025-11-14 | Fourthstone LLC | 4% | SCHEDULE 13G/A |
| 2026-01-29 | FJ Capital Management LLC | 6.34% | SCHEDULE 13G |
| 2026-02-10 | Wellington Management Group LLP | 8.9% | SCHEDULE 13G/A |
| 2026-02-10 | Castle Creek Capital Partners VI, LP | 4.7% | SCHEDULE 13G/A |
| 2026-02-13 | Endeavour Capital Advisors Inc. | 5.4% | SCHEDULE 13G/A |
| 2026-02-17 | AllianceBernstein L.P. | 7.3% | SCHEDULE 13G/A |
| 2026-07-27 | BlackRock, Inc. | 5.6% | SCHEDULE 13G |
| 2026-08-13 | Wellington Management Group LLP | 7.6% | SCHEDULE 13G/A |
| 2026-08-14 | AllianceBernstein L.P. | 6.1% | SCHEDULE 13G/A |
Questions about who owns California BanCorp
Who owns California BanCorp?
On this page, 5 holders' latest ownership filings report 5% or more of California BanCorp: Wellington Management Group LLP (7.6%, Schedule 13G/A, filed 2026-08-13), FJ Capital Management LLC (6.34%, Schedule 13G, filed 2026-01-29), AllianceBernstein L.P. (6.1%, Schedule 13G/A, filed 2026-08-14), BlackRock, Inc. (5.6%, Schedule 13G, filed 2026-07-27) and Endeavour Capital Advisors Inc. (5.4%, Schedule 13G/A, filed 2026-02-13).
Who are the largest shareholders of California BanCorp?
By the share each holder's latest filing reports, the largest holders of California BanCorp on this page are Wellington Management Group LLP (7.6%), FJ Capital Management LLC (6.34%) and AllianceBernstein L.P. (6.1%).
When did Wellington Management Group LLP buy into California BanCorp?
The filings give report dates, not purchase dates. The earliest filing from Wellington Management Group LLP on this page is the Schedule 13G, filed 2025-11-12, reporting 6.4%; its latest, Schedule 13G/A filed 2026-08-13, reports 7.6%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 10 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.