David I. Rainer - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
David I. Rainer has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $1.43M.
Profile
David I. Rainer is a corporate insider at California BanCorp \ CA (BCAL). Rainer has reported 6 insider filings with the SEC since 2024. The most recent filing was in May 2026.
| Role | Executive Chairman |
|---|---|
| Notability | 20/100 |
Board memberships
- California BanCorp \ CA
Trading Pattern
InsiderAlpha's records for David I. Rainer go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role David I. Rainer has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Executive Chairman at California BanCorp \ CA (BCAL) - 6 filings, 2024 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-08 | BCAL | California BanCorp \ CA | S - Open-market sale | 75.0K | $19.00 | $1.43M |
| 2026-03-04 | BCAL | California BanCorp \ CA | A - Grant or award | 28.8K | $0.00 | |
| 2026-03-04 | BCAL | California BanCorp \ CA | A - Grant or award | 65.4K | $0.00 | |
| 2026-03-04 | BCAL | California BanCorp \ CA | F - Tax withholding / forfeiture | 5.2K | $18.31 | $95K |
| 2026-03-04 | BCAL | California BanCorp \ CA | F - Tax withholding / forfeiture | 613 | $18.31 | $11K |
| 2025-12-03 | BCAL | California BanCorp \ CA | F - Tax withholding / forfeiture | 32.9K | $19.45 | $640K |
| 2025-08-27 | BCAL | California BanCorp \ CA | D - Derivative transaction | 6.3K | $16.72 | $105K |
| 2025-08-02 | BCAL | California BanCorp \ CA | F - Tax withholding / forfeiture | 3.5K | $14.60 | $51K |
| 2024-12-03 | BCAL | California BanCorp \ CA | F - Tax withholding / forfeiture | 32.9K | $17.92 | $590K |
| 2024-12-03 | BCAL | California BanCorp \ CA | G - Bona-fide gift | 3.0K | $0.00 |
Companies - Last 90 Days
- California BanCorp \ CA (BCAL) - 1 filing, last 2026-05-08
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies David I. Rainer has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- David J. Volk - $44.96M of BCAL open-market activity in the last 12 months
- Richard Hernandez - $325K of BCAL open-market activity in the last 12 months
- Jean Carandang - $143K of BCAL open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Charles A. Davis
- Deep Track Biotechnology Master Fund, Ltd.
- Robert E. Dixon
- Romeo R. Dizon
- Kevin Michael Donahue
- DONEGAL MUTUAL INSURANCE CO
- DORCHESTER MINERALS OPERATING LP
- Robert W. Duggan
Frequently Asked Questions
Who is David I. Rainer?
David I. Rainer is a corporate insider at California BanCorp \ CA (BCAL). Rainer has reported 6 insider filings with the SEC since 2024. The most recent filing was in May 2026.…
How many SEC Form 4 filings has David I. Rainer submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has David I. Rainer been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($1.43M) across all tracked filings.
Where can I see all of David I. Rainer's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live David I. Rainer profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.