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BioAtla, Inc. — Insider Transactions

Form 4 filings by directors, officers, and 10%+ shareholders

SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.

Overview All Filings Annual Quarterly Insiders
Insider Title Type Shares Price Value Owns After Date
WALDRON RICHARD A Chief Financial Officer Tax Withholding 2,371 $0.90 $2,134 346,150 Nov 30, 2025
Sievers Eric Chief Medical Officer Tax Withholding 2,729 $0.90 $2,456 361,845 Nov 30, 2025
SHORT JAY M PHD Chief Executive Officer Tax Withholding 6,347 $0.90 $5,712 2,237,331 Nov 30, 2025
Vasquez Christian See Remarks Tax Withholding 1,566 $0.90 $1,409 291,998 Nov 30, 2025
SHORT JAY M PHD Chief Executive Officer Tax Withholding 6,347 $0.46 $2,920 2,243,678 Aug 31, 2025
Vasquez Christian See Remarks Tax Withholding 1,566 $0.46 $720 283,564 Aug 31, 2025
Sievers Eric Chief Medical Officer Tax Withholding 2,729 $0.46 $1,255 364,574 Aug 31, 2025
WALDRON RICHARD A Chief Financial Officer Tax Withholding 2,371 $0.46 $1,091 338,521 Aug 31, 2025
Moran Susan Award / Grant 23,500 52,307 Jun 18, 2025
Williams Eddie Award / Grant 23,500 60,200 Jun 18, 2025
STEINMAN LAWRENCE Award / Grant 23,500 78,459 Jun 18, 2025
GRAY MARY ANN Award / Grant 23,500 77,397 Jun 18, 2025
MCBRINN SYLVIA Award / Grant 23,500 59,125 Jun 18, 2025
Smith Scott Andrew Award / Grant 23,500 321,550 Jun 18, 2025
SHORT JAY M PHD Chief Executive Officer Tax Withholding 6,347 $0.41 $2,602 2,250,025 May 31, 2025
WALDRON RICHARD A Chief Financial Officer Tax Withholding 2,371 $0.41 $972 340,892 May 31, 2025
Sievers Eric Chief Medical Officer Tax Withholding 2,729 $0.41 $1,119 367,303 May 31, 2025
Vasquez Christian See Remarks Tax Withholding 1,566 $0.41 $642 285,130 May 31, 2025
SHORT JAY M PHD Chief Executive Officer Award / Grant 431,000 2,256,372 Mar 12, 2025
Vasquez Christian See Remarks Award / Grant 85,000 276,696 Mar 11, 2025
WALDRON RICHARD A Chief Financial Officer Award / Grant 100,000 333,263 Mar 11, 2025
Sievers Eric Chief Medical Officer Award / Grant 175,000 370,032 Mar 11, 2025
SHORT JAY M PHD Chief Executive Officer Tax Withholding 30,911 $0.46 $14,219 1,825,372 Feb 16, 2025
Sievers Eric Chief Medical Officer Tax Withholding 12,530 $0.46 $5,764 195,032 Feb 15, 2025
WALDRON RICHARD A Chief Financial Officer Tax Withholding 10,887 $0.46 $5,008 233,263 Feb 15, 2025
Vasquez Christian See Remarks Tax Withholding 7,189 $0.46 $3,307 191,696 Feb 15, 2025
Smith Scott Andrew Tax Withholding 2,181 $1.77 $3,860 298,050 Aug 31, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $1.77 $1,012 207,562 Aug 31, 2024
Smith Scott Andrew Tax Withholding 2,181 $1.81 $3,948 300,231 Jul 31, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $1.81 $1,035 208,134 Jul 31, 2024
Smith Scott Andrew Tax Withholding 2,181 $1.37 $2,988 302,412 Jun 30, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $1.37 $784 208,706 Jun 30, 2024
GRAY MARY ANN Award / Grant 16,500 53,897 Jun 13, 2024
MCBRINN SYLVIA Award / Grant 16,500 35,625 Jun 13, 2024
Smith Scott Andrew Award / Grant 16,500 304,593 Jun 13, 2024
STEINMAN LAWRENCE Award / Grant 16,500 54,959 Jun 13, 2024
Williams Eddie Award / Grant 16,500 36,700 Jun 13, 2024
Moran Susan Award / Grant 16,500 28,807 Jun 13, 2024
Smith Scott Andrew Tax Withholding 2,181 $1.51 $3,293 288,093 May 31, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $1.51 $864 209,278 May 31, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $2.26 $1,293 209,850 Apr 30, 2024
Smith Scott Andrew Tax Withholding 2,181 $2.26 $4,929 290,274 Apr 30, 2024
Smith Scott Andrew Tax Withholding 2,181 $3.44 $7,503 292,455 Mar 31, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $3.44 $1,968 210,422 Mar 31, 2024
Smith Scott Andrew Tax Withholding 2,181 $2.70 $5,889 294,636 Feb 29, 2024
Sievers Eric Chief Medical Officer Tax Withholding 572 $2.70 $1,544 210,994 Feb 29, 2024
SHORT JAY M PHD Chief Executive Officer Award / Grant 417,000 1,856,283 Feb 16, 2024
WALDRON RICHARD A Chief Financial Officer Award / Grant 106,000 230,923 Feb 15, 2024
Vasquez Christian See Remarks Award / Grant 70,000 185,659 Feb 15, 2024
Sievers Eric Chief Medical Officer Award / Grant 122,000 211,566 Feb 15, 2024