BioAtla, Inc. ($BCAB) Insider Transactions

Last updated: 2026-03-14 11:57 UTC | Total transactions: 146

In the last 12 months, insiders at BioAtla, Inc. ($BCAB) filed 146 transactions with the SEC: 8 open-market purchases totaling $335,852 and 0 sales totaling $0. Net insider sentiment: net buying.

BioAtla, Inc. operates in the Biological products, (no disgnostic substances) industry (Life sciences sector).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 10, 2026 Sievers Eric Chief Medical Officer A Common Stock 240000 $0.00 598,705.0000 58,792,088 66.91% 0.41%
March 10, 2026 Vasquez Christian Chief Financial Officer A Common Stock 240000 $0.00 530,196.0000 58,792,088 82.70% 0.41%
March 11, 2026 SHORT JAY M PHD Chief Executive Officer A Common Stock 430000 $0.00 4,272,978.0000 58,792,088 11.19% 0.73%
Feb. 28, 2026 SHORT JAY M PHD Chief Executive Officer F Common Stock 7728 $0.25 3,842,978.0000 58,792,088 0.20% 0.01%
Feb. 28, 2026 Vasquez Christian Chief Financial Officer F Common Stock 1802 $0.25 290,196.0000 58,792,088 0.62% 0.00%
Feb. 28, 2026 Sievers Eric Chief Medical Officer F Common Stock 3140 $0.25 358,705.0000 58,792,088 0.87% 0.01%
Feb. 28, 2026 WALDRON RICHARD A Former Chief Financial Officer F Common Stock 2729 $0.25 343,421.0000 58,792,088 0.79% 0.00%
Nov. 30, 2025 SHORT JAY M PHD Chief Executive Officer F Common Stock 6347 $0.90 3,850,706.0000 58,792,088 0.16% 0.01%
Nov. 30, 2025 Vasquez Christian See Remarks F Common Stock 1566 $0.90 291,998.0000 58,792,088 0.53% 0.00%
Nov. 30, 2025 WALDRON RICHARD A Chief Financial Officer F Common Stock 2371 $0.90 346,150.0000 58,792,088 0.68% 0.00%
Nov. 30, 2025 Sievers Eric Chief Medical Officer F Common Stock 2729 $0.90 361,845.0000 58,792,088 0.75% 0.00%
Aug. 31, 2025 WALDRON RICHARD A Chief Financial Officer F Common Stock 2371 $0.46 338,521.0000 58,099,164 0.70% 0.00%
Aug. 31, 2025 Sievers Eric Chief Medical Officer F Common Stock 2729 $0.46 364,574.0000 58,099,164 0.74% 0.00%
Aug. 31, 2025 Vasquez Christian See Remarks F Common Stock 1566 $0.46 283,564.0000 58,099,164 0.55% 0.00%
Aug. 31, 2025 SHORT JAY M PHD Chief Executive Officer F Common Stock 6347 $0.46 3,857,053.0000 58,099,164 0.16% 0.01%
June 18, 2025 Williams Eddie Not found A Common Stock 23500 $0.00 60,200.0000 58,099,164 64.03% 0.04%
June 18, 2025 MCBRINN SYLVIA Not found A Common Stock 23500 $0.00 59,125.0000 58,099,164 65.96% 0.04%
June 18, 2025 GRAY MARY ANN Not found A Common Stock 23500 $0.00 77,397.0000 58,099,164 43.60% 0.04%
June 18, 2025 STEINMAN LAWRENCE Not found A Common Stock 23500 $0.00 78,459.0000 58,099,164 42.76% 0.04%
June 18, 2025 Moran Susan Not found A Common Stock 23500 $0.00 52,307.0000 58,099,164 81.58% 0.04%
June 18, 2025 Smith Scott Andrew Not found A Common Stock 23500 $0.00 321,550.0000 58,099,164 7.88% 0.04%
May 31, 2025 WALDRON RICHARD A Chief Financial Officer F Common Stock 2371 $0.41 340,892.0000 58,099,164 0.69% 0.00%
May 31, 2025 Sievers Eric Chief Medical Officer F Common Stock 2729 $0.41 367,303.0000 58,099,164 0.74% 0.00%
May 31, 2025 SHORT JAY M PHD Chief Executive Officer F Common Stock 6347 $0.41 3,863,400.0000 58,099,164 0.16% 0.01%
May 31, 2025 Vasquez Christian See Remarks F Common Stock 1566 $0.41 285,130.0000 58,099,164 0.55% 0.00%
March 11, 2025 Vasquez Christian See Remarks A Common Stock 85000 $0.00 276,696.0000 58,099,164 44.34% 0.15%
March 12, 2025 SHORT JAY M PHD Chief Executive Officer A Common Stock 431000 $0.00 3,869,747.0000 58,099,164 12.53% 0.74%
March 11, 2025 WALDRON RICHARD A Chief Financial Officer A Common Stock 100000 $0.00 333,263.0000 58,099,164 42.87% 0.17%
March 11, 2025 Sievers Eric Chief Medical Officer A Common Stock 175000 $0.00 370,032.0000 58,099,164 89.73% 0.30%
Feb. 15, 2025 Vasquez Christian See Remarks F Common Stock 7189 $0.46 191,696.0000 58,099,164 3.61% 0.01%
Feb. 16, 2025 SHORT JAY M PHD Chief Executive Officer F Common Stock 30911 $0.46 3,438,747.0000 58,099,164 0.89% 0.05%
Feb. 15, 2025 Sievers Eric Chief Medical Officer F Common Stock 12530 $0.46 195,032.0000 58,099,164 6.04% 0.02%
Feb. 15, 2025 WALDRON RICHARD A Chief Financial Officer F Common Stock 10887 $0.46 233,263.0000 58,099,164 4.46% 0.02%
Aug. 31, 2024 Smith Scott Andrew Not found F Common Stock 2181 $1.77 298,050.0000 48,077,599 0.73% 0.00%
Aug. 31, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $1.77 207,562.0000 48,077,599 0.27% 0.00%
July 31, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $1.81 208,134.0000 48,077,599 0.27% 0.00%
July 31, 2024 Smith Scott Andrew Not found F Common Stock 2181 $1.81 300,231.0000 48,077,599 0.72% 0.00%
June 30, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $1.37 208,706.0000 48,077,599 0.27% 0.00%
June 30, 2024 Smith Scott Andrew Not found F Common Stock 2181 $1.37 302,412.0000 48,077,599 0.72% 0.00%
June 13, 2024 Smith Scott Andrew Not found A Common Stock 16500 $0.00 304,593.0000 48,077,599 5.73% 0.03%
June 13, 2024 STEINMAN LAWRENCE Not found A Common Stock 16500 $0.00 54,959.0000 48,077,599 42.90% 0.03%
June 13, 2024 Moran Susan Not found A Common Stock 16500 $0.00 28,807.0000 48,077,599 134.07% 0.03%
June 13, 2024 GRAY MARY ANN Not found A Common Stock 16500 $0.00 53,897.0000 48,077,599 44.12% 0.03%
June 13, 2024 MCBRINN SYLVIA Not found A Common Stock 16500 $0.00 35,625.0000 48,077,599 86.27% 0.03%
June 13, 2024 Williams Eddie Not found A Common Stock 16500 $0.00 36,700.0000 48,077,599 81.68% 0.03%
May 31, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $1.51 209,278.0000 48,077,599 0.27% 0.00%
May 31, 2024 Smith Scott Andrew Not found F Common Stock 2181 $1.51 288,093.0000 48,077,599 0.75% 0.00%
April 30, 2024 Smith Scott Andrew Not found F Common Stock 2181 $2.26 290,274.0000 48,077,599 0.75% 0.00%
April 30, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $2.26 209,850.0000 48,077,599 0.27% 0.00%
March 31, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $3.44 210,422.0000 48,077,599 0.27% 0.00%
March 31, 2024 Smith Scott Andrew Not found F Common Stock 2181 $3.44 292,455.0000 48,077,599 0.74% 0.00%
Feb. 29, 2024 Smith Scott Andrew Director F Common Stock 2181 $2.70 294,636.0000 48,077,599 0.73% 0.00%
Feb. 29, 2024 Sievers Eric Chief Medical Officer F Common Stock 572 $2.70 210,994.0000 48,077,599 0.27% 0.00%
Feb. 15, 2024 Sievers Eric Chief Medical Officer A Common Stock 122000 $0.00 211,566.0000 48,077,599 136.21% 0.25%
Feb. 16, 2024 SHORT JAY M PHD Chief Executive Officer A Common Stock 417000 $0.00 3,469,658.0000 48,077,599 13.66% 0.87%
Feb. 15, 2024 WALDRON RICHARD A Chief Financial Officer A Common Stock 106000 $0.00 230,923.0000 48,077,599 84.85% 0.22%
Feb. 15, 2024 Vasquez Christian See Remarks A Common Stock 70000 $0.00 185,659.0000 48,077,599 60.52% 0.15%
Jan. 31, 2024 Smith Scott Andrew Director F Common Stock 2181 $1.92 296,817.0000 48,077,599 0.73% 0.00%
Jan. 31, 2024 Sievers Eric Chief Medical Officer F Common Stock 657 $1.92 89,566.0000 48,077,599 0.73% 0.00%
March 28, 2023 MCBRINN SYLVIA Director P Common Stock 4000 $2.35 19,125.0000 0 26.45% 0.00%
Dec. 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $2.46 90,223.0000 0 0.61% 0.00%
Dec. 31, 2023 Smith Scott Andrew Director F Common Stock 1791 $2.46 298,998.0000 0 0.60% 0.00%
Dec. 31, 2023 GRAY MARY ANN Director A Common Stock 5995 $0.00 37,397.0000 0 19.09% 0.00%
Dec. 31, 2023 Williams Eddie Director A Common Stock 4827 $0.00 20,200.0000 0 31.40% 0.00%
Dec. 26, 2023 MCBRINN SYLVIA Director P Common Stock 4000 $2.33 15,125.0000 0 35.96% 0.00%
Dec. 20, 2023 SHORT JAY M PHD Chief Executive Officer P Common Stock 50000 $2.14 3,052,658.0000 0 1.67% 0.00%
Dec. 19, 2023 Vasquez Christian See Remarks P Common Stock 7495 $2.04 115,659.0000 0 6.93% 0.00%
Dec. 19, 2023 STEINMAN LAWRENCE Director P Common Stock 20000 $2.05 38,459.0000 0 108.35% 0.00%
Nov. 30, 2023 Smith Scott Andrew Director F Common Stock 1791 $1.77 300,789.0000 0 0.59% 0.00%
Nov. 30, 2023 Sievers Eric Chief Medical Officer F Common Stock 554 $1.77 90,778.0000 0 0.61% 0.00%
Oct. 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $1.47 3,002,658.0000 0 0.10% 0.00%
Oct. 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $1.47 124,923.0000 0 0.77% 0.00%
Oct. 31, 2023 Vasquez Christian See Remarks F Common Stock 194 $1.47 101,162.0000 0 0.19% 0.00%
Oct. 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $1.47 91,332.0000 0 0.60% 0.00%
Oct. 31, 2023 Smith Scott Andrew Director F Common Stock 1791 $1.47 302,580.0000 0 0.59% 0.00%
Sept. 30, 2023 GRAY MARY ANN Director A Common Stock 8676 $0.00 31,402.0000 0 38.18% 0.00%
Sept. 30, 2023 Williams Eddie Director A Common Stock 6985 $0.00 15,373.0000 0 83.27% 0.00%
Sept. 30, 2023 Vasquez Christian See Remarks F Common Stock 194 $1.70 101,356.0000 0 0.19% 0.00%
Sept. 30, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $1.70 125,893.0000 0 0.76% 0.00%
Sept. 30, 2023 Sievers Eric Chief Medical Officer F Common Stock 554 $1.70 91,887.0000 0 0.60% 0.00%
Sept. 30, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $1.70 3,005,546.0000 0 0.10% 0.00%
Sept. 30, 2023 Smith Scott Andrew Director F Common Stock 1791 $1.70 304,371.0000 0 0.58% 0.00%
Sept. 8, 2023 MCBRINN SYLVIA Director P Common Stock 2000 $2.54 11,125.0000 0 21.92% 0.00%
Aug. 31, 2023 Vasquez Christian See Remarks F Common Stock 194 $2.51 101,550.0000 0 0.19% 0.00%
Aug. 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $2.51 126,863.0000 0 0.76% 0.00%
Aug. 31, 2023 Smith Scott Andrew Director F Common Stock 1791 $2.51 306,162.0000 0 0.58% 0.00%
Aug. 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $2.51 92,441.0000 0 0.60% 0.00%
Aug. 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $2.51 3,008,434.0000 0 0.10% 0.00%
July 31, 2023 Vasquez Christian See Remarks F Common Stock 194 $2.99 101,744.0000 0 0.19% 0.00%
July 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $2.99 3,011,322.0000 0 0.10% 0.00%
July 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $2.99 127,833.0000 0 0.75% 0.00%
July 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 554 $2.99 92,996.0000 0 0.59% 0.00%
July 31, 2023 Smith Scott Andrew Director F Common Stock 1791 $2.99 307,953.0000 0 0.58% 0.00%
June 30, 2023 GRAY MARY ANN Director A Common Stock 4916 $0.00 22,726.0000 0 27.60% 0.00%
June 30, 2023 Williams Eddie Director A Common Stock 3958 $0.00 8,388.0000 0 89.35% 0.00%
June 30, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $3.00 125,780.0000 0 0.77% 0.00%
June 30, 2023 Smith Scott Andrew Director F Common Stock 1791 $3.00 309,744.0000 0 0.57% 0.00%
June 30, 2023 Vasquez Christian See Remarks F Common Stock 194 $3.00 101,938.0000 0 0.19% 0.00%
June 30, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $3.00 3,014,210.0000 0 0.10% 0.00%
June 30, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $3.00 90,527.0000 0 0.61% 0.00%
June 14, 2023 GRAY MARY ANN Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
June 14, 2023 Smith Scott Andrew Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
June 14, 2023 Smith Scott Andrew Director A Stock Option (Right to Buy) 5895 $0.00 5,895.0000 0 9999.99% 0.00%
June 14, 2023 Williams Eddie Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
June 14, 2023 Moran Susan Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
June 14, 2023 STEINMAN LAWRENCE Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
June 14, 2023 MCBRINN SYLVIA Director A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
May 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 554 $3.15 91,082.0000 0 0.60% 0.00%
May 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $3.15 3,017,098.0000 0 0.10% 0.00%
May 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $3.15 126,750.0000 0 0.76% 0.00%
May 31, 2023 Smith Scott Andrew Director F Common Stock 1791 $3.15 311,535.0000 0 0.57% 0.00%
May 31, 2023 Vasquez Christian See Remarks F Common Stock 194 $3.15 102,132.0000 0 0.19% 0.00%
March 31, 2023 GRAY MARY ANN Director A Common Stock 5503 $0.00 17,810.0000 0 44.71% 0.00%
March 31, 2023 Williams Eddie Director A Common Stock 4430 $0.00 4,430.0000 0 9999.99% 0.00%
April 30, 2023 Vasquez Christian See Remarks F Common Stock 194 $3.37 102,326.0000 0 0.19% 0.00%
April 30, 2023 Smith Scott Andrew Director F Common Stock 1791 $3.37 313,326.0000 0 0.57% 0.00%
April 30, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $3.37 91,636.0000 0 0.60% 0.00%
April 30, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $3.37 127,720.0000 0 0.75% 0.00%
April 30, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $3.37 3,019,986.0000 0 0.10% 0.00%
March 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $2.68 128,690.0000 0 0.75% 0.00%
March 31, 2023 Smith Scott Andrew Former President F Common Stock 1791 $2.68 315,117.0000 0 0.57% 0.00%
March 31, 2023 Vasquez Christian See Remarks F Common Stock 189 $2.68 102,520.0000 0 0.18% 0.00%
March 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $2.68 3,022,874.0000 0 0.10% 0.00%
March 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 555 $2.68 92,191.0000 0 0.60% 0.00%
March 29, 2023 SHORT JAY M PHD Chief Executive Officer P Common Stock 40800 $2.47 3,025,762.0000 0 1.37% 0.00%
March 28, 2023 Vasquez Christian See Remarks P Common Stock 20000 $2.40 102,709.0000 0 24.18% 0.00%
Feb. 28, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $2.98 129,660.0000 0 0.74% 0.00%
Feb. 9, 2023 WALDRON RICHARD A Chief Financial Officer A Employee Stock Option (right to buy) 210000 $0.00 210,000.0000 0 9999.99% 0.00%
Feb. 28, 2023 Vasquez Christian See Remarks F Common Stock 229 $2.98 82,709.0000 0 0.28% 0.00%
Feb. 9, 2023 Vasquez Christian See Remarks A Employee Stock Option (right to buy) 135000 $0.00 135,000.0000 0 9999.99% 0.00%
Feb. 28, 2023 Sievers Eric Chief Medical Officer F Common Stock 554 $2.98 92,746.0000 0 0.59% 0.00%
Feb. 9, 2023 Sievers Eric Chief Medical Officer A Employee Stock Option (right to buy) 240000 $0.00 240,000.0000 0 9999.99% 0.00%
Feb. 28, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 2888 $2.89 2,984,962.0000 0 0.10% 0.00%
Feb. 10, 2023 SHORT JAY M PHD Chief Executive Officer A Employee Stock Option (right to buy) 850000 $0.00 850,000.0000 0 9999.99% 0.00%
Feb. 28, 2023 Smith Scott Andrew Former President F Common Stock 1791 $2.98 316,908.0000 0 0.56% 0.00%
Feb. 10, 2023 Smith Scott Andrew Former President A Employee Stock Option (right to buy) 350000 $0.00 350,000.0000 0 9999.99% 0.00%
Jan. 31, 2023 SHORT JAY M PHD Chief Executive Officer F Common Stock 3517 $3.79 2,987,850.0000 0 0.12% 0.00%
Jan. 31, 2023 Vasquez Christian See Remarks F Common Stock 229 $3.79 82,938.0000 0 0.28% 0.00%
Jan. 31, 2023 Sievers Eric Chief Medical Officer F Common Stock 654 $3.79 93,300.0000 0 0.70% 0.00%
Jan. 31, 2023 Smith Scott Andrew President F Common Stock 2181 $3.79 318,699.0000 0 0.68% 0.00%
Jan. 31, 2023 WALDRON RICHARD A Chief Financial Officer F Common Stock 1144 $3.79 130,630.0000 0 0.87% 0.00%
Dec. 31, 2022 Smith Scott Andrew President F Common Stock 1791 $8.25 320,880.0000 0 0.56% 0.00%
Dec. 31, 2022 WALDRON RICHARD A Chief Financial Officer F Common Stock 970 $8.25 131,774.0000 0 0.73% 0.00%
Dec. 31, 2022 Sievers Eric Chief Medical Officer F Common Stock 554 $8.25 93,954.0000 0 0.59% 0.00%
Dec. 31, 2022 Vasquez Christian See Remarks F Common Stock 194 $8.25 83,167.0000 0 0.23% 0.00%
Dec. 31, 2022 SHORT JAY M PHD Chief Executive Officer F Common Stock 4667 $8.25 2,991,367.0000 0 0.16% 0.00%