BCAB · Insider Trading
BIOATLA INC
Every open-market purchase and sale reported by BCAB officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-05 | Eric Sievers | Chief Medical Officer | F | −494 | −$587 |
| 2026-06-05 | Christian Vasquez | Chief Financial Officer | F | −257 | −$352 |
| 2026-06-05 | Jay M Phd Short | Chief Executive Officer | F | −898 | −$1.13K |
| 2026-03-12 | Christian Vasquez | Chief Financial Officer | A | +240,000 | — |
| 2026-03-12 | Eric Sievers | Chief Medical Officer | A | +240,000 | — |
| 2026-03-12 | Jay M Phd Short | Chief Executive Officer | A | +430,000 | — |
| 2026-03-02 | Eric Sievers | Chief Medical Officer | F | −3,140 | −$776 |
| 2026-03-02 | Christian Vasquez | Chief Financial Officer | F | −1,802 | −$445 |
| 2026-03-02 | Richard A Waldron | Former Chief Financial Officer | F | −2,729 | −$674 |
| 2026-03-02 | Jay M Phd Short | Chief Executive Officer | F | −7,728 | −$1.91K |
| 2025-12-01 | Richard A Waldron | Chief Financial Officer | F | −2,371 | −$2.14K |
| 2025-12-01 | Christian Vasquez | See Remarks | F | −1,566 | −$1.42K |
| 2025-12-01 | Jay M Phd Short | Chief Executive Officer | F | −6,347 | −$5.74K |
| 2025-12-01 | Eric Sievers | Chief Medical Officer | F | −2,729 | −$2.47K |
| 2025-09-02 | Christian Vasquez | See Remarks | F | −1,566 | −$713 |
| 2025-09-02 | Richard A Waldron | Chief Financial Officer | F | −2,371 | −$1.08K |
| 2025-09-02 | Eric Sievers | Chief Medical Officer | F | −2,729 | −$1.24K |
| 2025-09-02 | Jay M Phd Short | Chief Executive Officer | F | −6,347 | −$2.89K |
| 2025-06-18 | Susan Moran | Director | A | +23,500 | — |
| 2025-06-18 | Scott Andrew Smith | Director | A | +23,500 | — |
| 2025-06-18 | Eddie Williams | Director | A | +23,500 | — |
| 2025-06-18 | Mary Ann Gray | Director | A | +23,500 | — |
| 2025-06-18 | Sylvia McBrinn | Director | A | +23,500 | — |
| 2025-06-18 | Lawrence Steinman | Director | A | +23,500 | — |
| 2025-06-03 | Eric Sievers | Chief Medical Officer | F | −2,729 | −$1.12K |
| 2025-06-03 | Christian Vasquez | See Remarks | F | −1,566 | −$640 |
| 2025-06-03 | Jay M Phd Short | Chief Executive Officer | F | −6,347 | −$2.60K |
| 2025-06-03 | Richard A Waldron | Chief Financial Officer | F | −2,371 | −$970 |
| 2025-03-13 | Richard A Waldron | Chief Financial Officer | A | +100,000 | — |
| 2025-03-13 | Christian Vasquez | See Remarks | A | +85,000 | — |
| 2025-03-13 | Eric Sievers | Chief Medical Officer | A | +175,000 | — |
| 2025-03-13 | Jay M Phd Short | Chief Executive Officer | A | +431,000 | — |
| 2025-02-24 | Eric Sievers | Chief Medical Officer | F | −12,530 | −$5.76K |
| 2025-02-24 | Richard A Waldron | Chief Financial Officer | F | −10,887 | −$5.01K |
| 2025-02-24 | Christian Vasquez | See Remarks | F | −7,189 | −$3.31K |
| 2025-02-24 | Jay M Phd Short | Chief Executive Officer | F | −30,911 | −$14.22K |
| 2024-09-03 | Eric Sievers | Chief Medical Officer | F | −572 | −$1.01K |
| 2024-09-03 | Scott Andrew Smith | Director | F | −2,181 | −$3.86K |
| 2024-08-01 | Eric Sievers | Chief Medical Officer | F | −572 | −$1.04K |
| 2024-08-01 | Scott Andrew Smith | Director | F | −2,181 | −$3.95K |
| 2024-07-01 | Eric Sievers | Chief Medical Officer | F | −572 | −$784 |
| 2024-07-01 | Scott Andrew Smith | Director | F | −2,181 | −$2.99K |
| 2024-06-14 | Susan Moran | Director | A | +16,500 | — |
| 2024-06-14 | Eddie Williams | Director | A | +16,500 | — |
| 2024-06-14 | Sylvia McBrinn | Director | A | +16,500 | — |
| 2024-06-14 | Mary Ann Gray | Director | A | +16,500 | — |
| 2024-06-14 | Lawrence Steinman | Director | A | +16,500 | — |
| 2024-06-14 | Scott Andrew Smith | Director | A | +16,500 | — |
| 2024-05-31 | Scott Andrew Smith | Director | F | −2,181 | −$3.29K |
| 2024-05-31 | Eric Sievers | Chief Medical Officer | F | −572 | −$864 |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Jay M Phd Short | Chief Executive Officer | 58,340 | $101.22K |
| Eric Sievers | Chief Medical Officer | 11,840 | $20.54K |
| Christian Vasquez | Chief Financial Officer | 10,347 | $17.95K |
| Richard A Waldron | Former Chief Financial Officer | 6,868 | $11.92K |
| Scott Andrew Smith | Director | 6,431 | $11.16K |
| Lawrence Steinman | Director | 1,569 | $2.72K |
| Mary Ann Gray | Director | 1,548 | $2.69K |
| Eddie Williams | Director | 1,204 | $2.09K |
| Sylvia McBrinn | Director | 1,182 | $2.05K |
| Susan Moran | Director | 1,046 | $1.81K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the BCAB quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.