BCAB insider transaction filings
BioAtla, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-02. Screen BCAB transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 3 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 3.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| SHORT JAY M PHD — Chief Executive Officer, Director | 1 | — | — | 1 |
| Sievers Eric — Chief Medical Officer | 1 | — | — | 1 |
| Vasquez Christian — Chief Financial Officer | 1 | — | — | 1 |
Recent Form 4 filings — BioAtla, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-02 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 134 @ $1.69 | EDGAR |
| 2026-09-02 | 4 | Vasquez Christian — Chief Financial Officer | Tax withholding (F): 71 @ $1.69 | EDGAR |
| 2026-09-02 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director | Tax withholding (F): 259 @ $1.69 | EDGAR |
| 2026-06-05 | 4 | Vasquez Christian — Chief Financial Officer | Tax withholding (F): 175 @ $0.17 · Tax withholding (F): 82 @ $3.93 | EDGAR |
| 2026-06-05 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 360 @ $0.17 · Tax withholding (F): 134 @ $3.93 | EDGAR |
| 2026-06-05 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director | Tax withholding (F): 639 @ $0.17 · Tax withholding (F): 259 @ $3.93 | EDGAR |
| 2026-03-12 | 4 | Sievers Eric — Chief Medical Officer | Grant/award (A): 240,000 @ $0 | EDGAR |
| 2026-03-12 | 4 | Vasquez Christian — Chief Financial Officer | Grant/award (A): 240,000 @ $0 | EDGAR |
| 2026-03-12 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director | Grant/award (A): 430,000 @ $0 | EDGAR |
| 2026-03-02 | 4 | Vasquez Christian — Chief Financial Officer | Tax withholding (F): 1,802 @ $0.25 | EDGAR |
| 2026-03-02 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 3,140 @ $0.25 | EDGAR |
| 2026-03-02 | 4 | WALDRON RICHARD A — Former Chief Financial Officer | Tax withholding (F): 2,729 @ $0.25 | EDGAR |
| 2026-03-02 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director | Tax withholding (F): 7,728 @ $0.25 | EDGAR |
| 2025-12-01 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 2,729 @ $0.90 | EDGAR |
| 2025-12-01 | 4 | Vasquez Christian — See Remarks | Tax withholding (F): 1,566 @ $0.90 | EDGAR |
| 2025-12-01 | 4 | WALDRON RICHARD A — Chief Financial Officer | Tax withholding (F): 2,371 @ $0.90 | EDGAR |
| 2025-12-01 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director, 10% owner | Tax withholding (F): 6,347 @ $0.90 | EDGAR |
| 2025-09-02 | 4 | Vasquez Christian — See Remarks | Tax withholding (F): 1,566 @ $0.46 | EDGAR |
| 2025-09-02 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 2,729 @ $0.46 | EDGAR |
| 2025-09-02 | 4 | WALDRON RICHARD A — Chief Financial Officer | Tax withholding (F): 2,371 @ $0.46 | EDGAR |
| 2025-09-02 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director, 10% owner | Tax withholding (F): 6,347 @ $0.46 | EDGAR |
| 2025-06-18 | 4 | Moran Susan — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-18 | 4 | Williams Eddie — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-18 | 4 | Smith Scott Andrew — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-18 | 4 | MCBRINN SYLVIA — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-18 | 4 | GRAY MARY ANN — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-18 | 4 | STEINMAN LAWRENCE — Director | Grant/award (A): 23,500 @ $0 | EDGAR |
| 2025-06-03 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 2,729 @ $0.41 | EDGAR |
| 2025-06-03 | 4 | Vasquez Christian — See Remarks | Tax withholding (F): 1,566 @ $0.41 | EDGAR |
| 2025-06-03 | 4 | WALDRON RICHARD A — Chief Financial Officer | Tax withholding (F): 2,371 @ $0.41 | EDGAR |
| 2025-06-03 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director, 10% owner | Tax withholding (F): 6,347 @ $0.41 | EDGAR |
| 2025-03-13 | 4 | Vasquez Christian — See Remarks | Grant/award (A): 85,000 @ $0 | EDGAR |
| 2025-03-13 | 4 | Sievers Eric — Chief Medical Officer | Grant/award (A): 175,000 @ $0 | EDGAR |
| 2025-03-13 | 4 | WALDRON RICHARD A — Chief Financial Officer | Grant/award (A): 100,000 @ $0 | EDGAR |
| 2025-03-13 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director, 10% owner | Grant/award (A): 431,000 @ $0 | EDGAR |
| 2025-02-24 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 12,530 @ $0.46 | EDGAR |
| 2025-02-24 | 4 | Vasquez Christian — See Remarks | Tax withholding (F): 7,189 @ $0.46 | EDGAR |
| 2025-02-24 | 4 | WALDRON RICHARD A — Chief Financial Officer | Tax withholding (F): 10,887 @ $0.46 | EDGAR |
| 2025-02-24 | 4 | SHORT JAY M PHD — Chief Executive Officer, Director, 10% owner | Tax withholding (F): 30,911 @ $0.46 | EDGAR |
| 2024-09-03 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 572 @ $1.77 | EDGAR |
| 2024-09-03 | 4 | Smith Scott Andrew — Director | Tax withholding (F): 2,181 @ $1.77 | EDGAR |
| 2024-08-01 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 572 @ $1.81 | EDGAR |
| 2024-08-01 | 4 | Smith Scott Andrew — Director | Tax withholding (F): 2,181 @ $1.81 | EDGAR |
| 2024-07-01 | 4 | Sievers Eric — Chief Medical Officer | Tax withholding (F): 572 @ $1.37 | EDGAR |
| 2024-07-01 | 4 | Smith Scott Andrew — Director | Tax withholding (F): 2,181 @ $1.37 | EDGAR |
| 2024-06-14 | 4 | Williams Eddie — Director | Grant/award (A): 16,500 @ $0 | EDGAR |
| 2024-06-14 | 4 | Smith Scott Andrew — Director | Grant/award (A): 16,500 @ $0 | EDGAR |
| 2024-06-14 | 4 | MCBRINN SYLVIA — Director | Grant/award (A): 16,500 @ $0 | EDGAR |
| 2024-06-14 | 4 | GRAY MARY ANN — Director | Grant/award (A): 16,500 @ $0 | EDGAR |
| 2024-06-14 | 4 | STEINMAN LAWRENCE — Director | Grant/award (A): 16,500 @ $0 | EDGAR |
Recent 8-K events — BioAtla, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-28 | 8-K | 3.01 — Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing | EDGAR |
| 2026-07-16 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-04-02 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-31 | 8-K | 2.02 — Results of Operations and Financial Condition 7.01 — Regulation FD Disclosure | EDGAR |
| 2026-03-23 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-03-02 | 8-K | 2.02 — Results of Operations and Financial Condition ? 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 7.01 — Regulation FD Disclosure 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-09 | 8-K | 8.01 — Other Events | EDGAR |
| 2026-02-06 | 8-K | 3.01 — Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing 7.01 — Regulation FD Disclosure | EDGAR |
| 2026-01-30 | 8-K | 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 5.07 — Submission of Matters to a Vote of Security Holders 7.01 — Regulation FD Disclosure 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-12 | 8-K | 3.02 — Unregistered Sales of Equity Securities 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 5.07 — Submission of Matters to a Vote of Security Holders 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
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