SEC Insider Transactions from PRINS RICHARD K.

Last updated: 2026-03-14 11:45 UTC | Total transactions: 57

Richard K. Prins sold Amphastar Pharmaceuticals ($AMPH) shares once on the open market in the last year for a total of $113 thousand. His most recent sale occurred on November 25, 2025. This places him 9,388th out of 11,678 insiders by sale value, well below the average of $8.6 million per insider across 6.37 transactions. Prins made no open market purchases in the period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Jan. 19, 2026 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 100000 $0.00 1,371,251.0000 90,457,910 7.87% 0.11%
Jan. 19, 2026 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 100000 $0.00 50,000.0000 90,457,910 66.67% 0.11%
Nov. 25, 2025 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 4179 $0.00 0.0000 47,677,000 100.00% 0.01%
Nov. 25, 2025 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 4179 $16.69 39,362.0000 47,677,000 11.88% 0.01%
Nov. 25, 2025 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found S Common Stock 4179 $27.10 35,183.0000 47,677,000 10.62% 0.01%
Oct. 17, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director A Options 750000 $0.00 750,000.0000 90,457,910 9999.99% 0.83%
June 2, 2025 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found A Common Stock 5122 $0.00 35,183.0000 49,890,000 17.04% 0.01%
June 2, 2025 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found A Stock Option (right to buy) 11402 $0.00 11,402.0000 49,890,000 9999.99% 0.02%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 100000 $0.00 1,201,251.0000 77,633,004 9.08% 0.13%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 70000 $0.00 1,271,251.0000 77,633,004 5.83% 0.09%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 100000 $0.00 100,000.0000 77,633,004 50.00% 0.13%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 70000 $0.00 140,000.0000 77,633,004 33.33% 0.09%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 58333 $0.00 0.0000 77,633,004 100.00% 0.08%
March 31, 2025 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 58333 $0.00 1,101,251.0000 77,633,004 5.59% 0.08%
Dec. 9, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found S Common Stock 10000 $43.77 30,471.0000 51,862,000 24.71% 0.02%
Dec. 9, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 10000 $0.00 0.0000 51,862,000 100.00% 0.02%
Dec. 9, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 10000 $19.52 40,471.0000 51,862,000 32.82% 0.02%
Dec. 9, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found G Common Stock 410 $0.00 30,061.0000 51,862,000 1.35% 0.00%
Nov. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 2500 $0.00 4,179.0000 51,862,000 37.43% 0.00%
Nov. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 2500 $16.69 36,471.0000 51,862,000 7.36% 0.00%
Nov. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found S Common Stock 5000 $48.80 31,471.0000 51,862,000 13.71% 0.01%
Nov. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found G Common Stock 1000 $0.00 30,471.0000 51,862,000 3.18% 0.00%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found S Common Stock 17101 $43.07 33,971.0000 52,046,000 33.48% 0.03%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 6004 $0.00 10,000.0000 52,046,000 37.52% 0.01%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 7182 $0.00 10,000.0000 52,046,000 41.80% 0.01%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 6004 $20.08 43,890.0000 52,046,000 15.85% 0.01%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 7182 $19.52 51,072.0000 52,046,000 16.36% 0.01%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Stock Option (right to buy) 3915 $0.00 10,000.0000 52,046,000 28.14% 0.01%
Aug. 12, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found M Common Stock 3915 $20.03 37,886.0000 52,046,000 11.52% 0.01%
Aug. 12, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director G Common Stock 200000 $0.00 1,042,917.0000 72,813,538 16.09% 0.27%
June 3, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found A Stock Option (right to buy) 6864 $0.00 6,864.0000 53,013,000 9999.99% 0.01%
June 3, 2024 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Not found A Common Stock 3076 $0.00 33,971.0000 53,013,000 9.96% 0.01%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 100000 $0.00 200,000.0000 63,725,084 33.33% 0.16%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 100000 $0.00 1,013,334.0000 63,725,084 10.95% 0.16%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 58333 $0.00 1,071,667.0000 63,725,084 5.76% 0.09%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 100000 $0.00 1,171,667.0000 63,725,084 9.33% 0.16%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 42750 $0.00 1,214,417.0000 63,725,084 3.65% 0.07%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Common Stock 28500 $0.00 1,242,917.0000 63,725,084 2.35% 0.04%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 100000 $0.00 100,000.0000 63,725,084 50.00% 0.16%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 58333 $0.00 58,333.0000 63,725,084 50.00% 0.09%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director M Restricted Stock Units 71250 $0.00 213,750.0000 63,725,084 25.00% 0.11%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director A Restricted Stock Units 210000 $0.00 210,000.0000 63,725,084 9999.99% 0.33%
March 13, 2024 IGC Pharma, Inc. $IGC PRINS RICHARD K Director A Restricted Stock Units 175000 $0.00 175,000.0000 63,725,084 9999.99% 0.27%
Nov. 17, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director G Common Stock 1000 $0.00 30,895.0000 53,921,000 3.14% 0.00%
Nov. 17, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 4000 $55.86 31,895.0000 53,921,000 11.14% 0.01%
Nov. 13, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 5000 $52.50 35,895.0000 53,921,000 12.23% 0.01%
Aug. 18, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 2000 $52.50 40,895.0000 53,102,000 4.66% 0.00%
Aug. 15, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 4163 $57.39 42,895.0000 53,102,000 8.85% 0.01%
June 5, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director A Common Stock 2716 $0.00 47,058.0000 51,970,000 6.13% 0.01%
June 5, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director A Stock Option (right to buy) 7016 $0.00 7,016.0000 51,970,000 9999.99% 0.01%
May 12, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director G Common Stock 3000 $0.00 44,342.0000 51,970,000 6.34% 0.01%
May 15, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director M Common Stock 5000 $16.69 49,342.0000 51,970,000 11.28% 0.01%
May 15, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 5000 $43.50 44,342.0000 51,970,000 10.13% 0.01%
May 12, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director M Stock option (right to buy) 5000 $0.00 11.6790 51,970,000 99.77% 0.01%
May 15, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director M Stock option (right to buy) 5000 $0.00 6,679.0000 51,970,000 42.81% 0.01%
May 12, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director S Common Stock 5000 $42.06 47,342.0000 51,970,000 9.55% 0.01%
May 12, 2023 Amphastar Pharmaceuticals, Inc. $AMPH PRINS RICHARD K Director M Common Stock 5000 $16.69 52,342.0000 51,970,000 10.56% 0.01%