Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Amphastar Pharmaceuticals, Inc. (AMPH) since 2015 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Amphastar Pharmaceuticals, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1297184.
Total stock buying since 2015: $663,089.
Total stock sales since 2015: $141,577,042.
Total stock option exercises since 2015: $122,096,970.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 8,231 | $221,210 | 709,180 | $10,075,817 |
| 2024 | 0 | $0 | 478,334 | $26,170,738 | 1,323,218 | $17,236,071 |
| 2023 | 0 | $0 | 372,394 | $18,304,754 | 336,159 | $5,499,331 |
| 2022 | 0 | $0 | 517,814 | $17,247,968 | 262,675 | $4,008,230 |
| 2021 | 0 | $0 | 483,856 | $9,511,266 | 250,377 | $3,597,988 |
| 2020 | 1,000 | $20,260 | 387,708 | $7,334,789 | 346,975 | $4,889,664 |
| 2019 | 0 | $0 | 523,458 | $11,135,018 | 882,731 | $13,662,463 |
| 2018 | 40,000 | $642,829 | 761,490 | $15,868,438 | 875,137 | $11,070,247 |
| 2017 | 0 | $0 | 262,119 | $4,727,217 | 2,714,478 | $31,859,283 |
| 2016 | 0 | $0 | 804,525 | $16,011,135 | 753,011 | $11,420,466 |
| 2015 | 0 | $0 | 977,046 | $15,044,509 | 691,800 | $8,777,410 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-09 | 0 | $0 | 500 | $15,491 | 0 | $0 |
| 2025-08 | 0 | $0 | 500 | $10,416 | 0 | $0 |
| 2025-07 | 0 | $0 | 500 | $11,734 | 0 | $0 |
| 2025-06 | 0 | $0 | 500 | $12,835 | 200,000 | $2,606,000 |
| 2025-05 | 0 | $0 | 500 | $12,041 | 0 | $0 |
| 2025-04 | 0 | $0 | 500 | $14,190 | 0 | $0 |
| 2025-03 | 0 | $0 | 5,231 | $144,503 | 509,180 | $7,469,817 |
| 2024-12 | 0 | $0 | 25,000 | $1,110,515 | 25,000 | $365,150 |
| 2024-11 | 0 | $0 | 24,533 | $1,238,824 | 22,033 | $309,473 |
| 2024-09 | 0 | $0 | 6,000 | $284,202 | 103,000 | $1,513,850 |
| 2024-08 | 0 | $0 | 21,101 | $929,957 | 21,101 | $399,716 |
| 2024-07 | 0 | $0 | 10,282 | $454,772 | 10,282 | $208,004 |
| 2024-06 | 0 | $0 | 7,096 | $293,217 | 100,000 | $1,469,000 |
| 2024-05 | 0 | $0 | 500 | $20,837 | 0 | $0 |
| 2024-04 | 0 | $0 | 500 | $21,714 | 0 | $0 |
| 2024-03 | 0 | $0 | 31,136 | $1,468,232 | 1,041,802 | $12,970,878 |
| 2024-02 | 0 | $0 | 500 | $26,677 | 0 | $0 |
| 2024-01 | 0 | $0 | 351,686 | $20,321,791 | 0 | $0 |
| 2023-12 | 0 | $0 | 8,330 | $491,042 | 7,830 | $119,041 |
| 2023-11 | 0 | $0 | 68,750 | $3,806,213 | 59,250 | $985,327 |
| 2023-10 | 0 | $0 | 500 | $22,889 | 0 | $0 |
| 2023-09 | 0 | $0 | 60,743 | $3,158,818 | 56,500 | $999,089 |
| 2023-08 | 0 | $0 | 47,738 | $2,604,941 | 28,816 | $482,379 |
| 2023-06 | 0 | $0 | 74,547 | $3,633,486 | 98,575 | $1,630,326 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-09-02 | Petersen Floyd F. | Sale | 500 | 30.98 | 15,491 |
| 2025-08-01 | Petersen Floyd F. | Sale | 500 | 20.83 | 10,416 |
| 2025-07-02 | Petersen Floyd F. | Sale | 500 | 23.47 | 11,734 |
| 2025-06-13 | Luo Mary Z. (COO, Chief Scientist, Chairman) | Option Ex | 200,000 | 13.03 | 2,606,000 |
| 2025-06-02 | Petersen Floyd F. | Sale | 500 | 25.67 | 12,835 |
| 2025-05-01 | Petersen Floyd F. | Sale | 500 | 24.08 | 12,041 |
| 2025-04-01 | Petersen Floyd F. | Sale | 500 | 28.38 | 14,190 |
| 2025-03-14 | Luo Mary Z. (COO, Chief Scientist, Chairman) | Option Ex | 501,690 | 14.69 | 7,369,826 |
| 2025-03-06 | Petersen Floyd F. | Sale | 1,000 | 27.99 | 27,986 |
| 2025-03-04 | Peters William J (CFO, EVP & TREASURER) | Sale | 4,231 | 27.54 | 116,517 |
| 2025-03-04 | Peters William J (CFO, EVP & TREASURER) | Option Ex | 7,490 | 13.35 | 99,991 |
| 2024-12-13 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Sale | 8,000 | 45.23 | 361,840 |
| 2024-12-13 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Option Ex | 8,000 | 11.33 | 90,640 |
| 2024-12-12 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Sale | 7,000 | 44.42 | 310,975 |
| 2024-12-12 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Option Ex | 7,000 | 11.33 | 79,310 |
| 2024-12-09 | Prins Richard K | Sale | 10,000 | 43.77 | 437,700 |
| 2024-12-09 | Prins Richard K | Option Ex | 10,000 | 19.52 | 195,200 |
| 2024-11-12 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Sale | 6,893 | 48.88 | 336,929 |
| 2024-11-12 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Option Ex | 6,893 | 14.95 | 103,050 |
| 2024-11-12 | Prins Richard K | Sale | 5,000 | 48.80 | 243,984 |
| 2024-11-12 | Prins Richard K | Option Ex | 2,500 | 16.69 | 41,725 |
| 2024-11-06 | Liawatidewi Yakob (EVP CORP ADMIN CENTER) | Sale | 5,214 | 52.05 | 271,388 |
| 2024-11-06 | Liawatidewi Yakob (EVP CORP ADMIN CENTER) | Option Ex | 5,214 | 13.03 | 67,938 |
| 2024-11-06 | Peters William J (CFO, EVP & TREASURER) | Sale | 7,426 | 52.05 | 386,523 |
| 2024-11-06 | Peters William J (CFO, EVP & TREASURER) | Option Ex | 7,426 | 13.03 | 96,760 |
| 2024-09-13 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Sale | 3,000 | 48.26 | 144,786 |
| 2024-09-13 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Option Ex | 3,000 | 14.95 | 44,850 |
| 2024-09-13 | Luo Mary Z. (COO, Chief Scientist, Chairman) | Option Ex | 100,000 | 14.69 | 1,469,000 |
| 2024-09-05 | Petersen Floyd F. | Sale | 3,000 | 46.47 | 139,416 |
| 2024-08-26 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Sale | 4,000 | 48.35 | 193,400 |
| 2024-08-26 | Zhou Rong (SENIOR EVP, PRODUCTION CENTER) | Option Ex | 4,000 | 14.95 | 59,800 |
| 2024-08-12 | Prins Richard K | Sale | 17,101 | 43.07 | 736,557 |
| 2024-08-12 | Prins Richard K | Option Ex | 17,101 | 19.88 | 339,916 |
| 2024-07-31 | Peters William J (CFO, EVP & TREASURER) | Sale | 10,282 | 44.23 | 454,772 |
| 2024-07-31 | Peters William J (CFO, EVP & TREASURER) | Option Ex | 10,282 | 20.23 | 208,004 |
| 2024-06-27 | Peters William J (CFO, EVP & TREASURER) | Sale | 3,596 | 41.07 | 147,691 |
| 2024-06-10 | Petersen Floyd F. | Sale | 3,000 | 41.40 | 124,200 |
| 2024-06-10 | Luo Mary Z. (COO, Chief Scientist, Chairman) | Option Ex | 100,000 | 14.69 | 1,469,000 |
| 2024-06-03 | Petersen Floyd F. | Sale | 500 | 42.65 | 21,326 |
| 2024-05-01 | Petersen Floyd F. | Sale | 500 | 41.67 | 20,837 |
| 2024-04-01 | Petersen Floyd F. | Sale | 500 | 43.43 | 21,714 |
| 2024-03-15 | Luo Mary Z. (COO,Chief Scientist & Chairman) | Option Ex | 1,032,976 | 12.46 | 12,870,880 |
| 2024-03-06 | Peters William J (CFO, EVP & TREASURER) | Sale | 18,136 | 47.09 | 854,024 |
| 2024-03-06 | Peters William J (CFO, EVP & TREASURER) | Option Ex | 8,826 | 11.33 | 99,998 |
| 2024-03-05 | Zasloff Michael A | Sale | 12,500 | 47.29 | 591,175 |
| 2024-03-01 | Petersen Floyd F. | Sale | 500 | 46.07 | 23,033 |
| 2024-02-01 | Petersen Floyd F. | Sale | 500 | 53.35 | 26,677 |
| 2024-01-10 | Zhang Jack Y. (CEO & Chief Scientific Officer) | Sale | 131,386 | 55.54 | 7,297,309 |
| 2024-01-09 | Zhang Jack Y. (CEO & Chief Scientific Officer) | Sale | 86,156 | 57.59 | 4,961,379 |
| 2024-01-08 | Zhang Jack Y. (CEO & Chief Scientific Officer) | Sale | 133,644 | 60.10 | 8,032,538 |
| 2024-01-02 | Petersen Floyd F. | Sale | 500 | 61.13 | 30,565 |
| 2023-12-04 | Zhou Rong (Senior EVP, Production Center) | Sale | 3,514 | 59.58 | 209,364 |
| 2023-12-04 | Zhou Rong (Senior EVP, Production Center) | Option Ex | 3,514 | 16.19 | 56,891 |
| 2023-12-01 | Zhou Rong (Senior EVP, Production Center) | Sale | 4,316 | 58.58 | 252,831 |
| 2023-12-01 | Zhou Rong (Senior EVP, Production Center) | Option Ex | 4,316 | 14.40 | 62,150 |
| 2023-12-01 | Petersen Floyd F. | Sale | 500 | 57.70 | 28,847 |
| 2023-11-17 | Prins Richard K | Sale | 4,000 | 55.86 | 223,444 |
| 2023-11-14 | Peters William J (CFO, EVP & Treasurer) | Sale | 59,250 | 55.66 | 3,297,618 |
| 2023-11-14 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 59,250 | 16.63 | 985,327 |
| 2023-11-13 | Prins Richard K | Sale | 5,000 | 52.50 | 262,500 |
| 2023-11-01 | Petersen Floyd F. | Sale | 500 | 45.30 | 22,651 |
| 2023-10-02 | Petersen Floyd F. | Sale | 500 | 45.78 | 22,889 |
| 2023-09-06 | Peters William J (CFO, EVP & Treasurer) | Sale | 60,743 | 52.00 | 3,158,818 |
| 2023-09-06 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 56,500 | 17.68 | 999,089 |
| 2023-08-28 | Liawatidewi Yakob (EVP Corp Admin Center) | Sale | 28,816 | 53.13 | 1,530,994 |
| 2023-08-28 | Liawatidewi Yakob (EVP Corp Admin Center) | Option Ex | 28,816 | 16.74 | 482,379 |
| 2023-08-18 | Prins Richard K | Sale | 2,000 | 52.50 | 105,006 |
| 2023-08-15 | Prins Richard K | Sale | 4,163 | 57.39 | 238,910 |
| 2023-08-15 | Zasloff Michael A | Sale | 12,759 | 57.22 | 730,031 |
| 2023-06-20 | Zhou Rong (EVP, Production Center) | Option Ex | 9,651 | 11.33 | 109,345 |
| 2023-06-15 | Zhou Rong (EVP, Production Center) | Sale | 5,000 | 51.79 | 258,945 |
| 2023-06-15 | Zhou Rong (EVP, Production Center) | Option Ex | 19,377 | 15.18 | 294,142 |
| 2023-06-15 | Peters William J (CFO, EVP & Treasurer) | Sale | 36,868 | 50.79 | 1,872,525 |
| 2023-06-15 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 36,868 | 19.79 | 729,617 |
| 2023-06-13 | Zhou Rong (EVP, Production Center) | Sale | 5,000 | 48.24 | 241,200 |
| 2023-06-13 | Zhou Rong (EVP, Production Center) | Option Ex | 5,000 | 14.40 | 72,000 |
| 2023-06-02 | Peters William J (CFO, EVP & Treasurer) | Sale | 11,000 | 46.35 | 509,861 |
| 2023-06-02 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 11,000 | 13.35 | 146,850 |
| 2023-06-01 | Lee Howard | Sale | 16,679 | 45.02 | 750,955 |
| 2023-06-01 | Lee Howard | Option Ex | 16,679 | 16.69 | 278,372 |
| 2023-05-18 | Deflin Gayle | Sale | 4,519 | 44.01 | 198,890 |
| 2023-05-18 | Zhou Rong (EVP, Production Center) | Sale | 10,000 | 44.20 | 442,050 |
| 2023-05-18 | Zhou Rong (EVP, Production Center) | Option Ex | 10,000 | 14.40 | 144,000 |
| 2023-05-18 | Peters William J (CFO, EVP & Treasurer) | Sale | 10,500 | 44.35 | 465,675 |
| 2023-05-18 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 10,500 | 13.35 | 140,175 |
| 2023-05-17 | Petersen Floyd F. | Sale | 5,000 | 43.13 | 215,655 |
| 2023-05-15 | Deflin Gayle | Sale | 1,500 | 43.15 | 64,728 |
| 2023-05-15 | Prins Richard K | Sale | 5,000 | 43.50 | 217,500 |
| 2023-05-15 | Prins Richard K | Option Ex | 5,000 | 16.69 | 83,450 |
| 2023-05-15 | Zasloff Michael A | Sale | 7,500 | 42.18 | 316,335 |
| 2023-05-12 | Prins Richard K | Sale | 5,000 | 42.06 | 210,325 |
| 2023-05-12 | Prins Richard K | Option Ex | 5,000 | 16.69 | 83,450 |
| 2023-04-17 | Peters William J (CFO, EVP & Treasurer) | Sale | 5,632 | 42.35 | 238,515 |
| 2023-04-17 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 5,632 | 13.35 | 75,187 |
| 2023-04-13 | Liawatidewi Yakob (EVP Corp Admin Center) | Sale | 11,494 | 41.50 | 477,001 |
| 2023-04-13 | Liawatidewi Yakob (EVP Corp Admin Center) | Option Ex | 11,494 | 20.23 | 232,523 |
| 2023-04-13 | Peters William J (CFO, EVP & Treasurer) | Sale | 4,868 | 42.35 | 206,159 |
| 2023-04-13 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 4,868 | 13.35 | 64,987 |
| 2023-04-10 | Liawatidewi Yakob (EVP Corp Admin Center) | Sale | 5,000 | 40.00 | 200,000 |
| 2023-04-10 | Liawatidewi Yakob (EVP Corp Admin Center) | Option Ex | 5,000 | 20.23 | 101,150 |
| 2023-04-10 | Peters William J (CFO, EVP & Treasurer) | Sale | 10,032 | 40.35 | 404,791 |
| 2023-04-10 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 10,032 | 13.35 | 133,927 |
| 2023-04-03 | Petersen Floyd F. | Sale | 491 | 37.72 | 18,518 |
| 2023-03-15 | Peters William J (CFO, EVP & Treasurer) | Sale | 12,776 | 36.43 | 465,468 |
| 2023-03-15 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 6,688 | 14.95 | 99,985 |
| 2023-03-01 | Petersen Floyd F. | Sale | 500 | 35.85 | 17,924 |
| 2023-03-01 | Peters William J (CFO, EVP & Treasurer) | Sale | 10,974 | 36.33 | 398,685 |
| 2023-03-01 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 10,974 | 11.33 | 124,335 |
| 2023-02-01 | Petersen Floyd F. | Sale | 500 | 30.35 | 15,175 |
| 2023-01-03 | Petersen Floyd F. | Sale | 500 | 27.94 | 13,971 |
| 2022-11-01 | Petersen Floyd F. | Sale | 500 | 31.13 | 15,565 |
| 2022-10-03 | Petersen Floyd F. | Sale | 1,500 | 28.59 | 42,888 |
| 2022-09-01 | Petersen Floyd F. | Sale | 500 | 29.44 | 14,721 |
| 2022-08-09 | Peters William J (CFO, EVP & Treasurer) | Sale | 10,000 | 38.35 | 383,500 |
| 2022-08-09 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 10,000 | 13.35 | 133,500 |
| 2022-08-01 | Petersen Floyd F. | Sale | 500 | 37.48 | 18,738 |
| 2022-07-18 | Gerst Diane G. | Sale | 1,520 | 37.23 | 56,597 |
| 2022-07-18 | Gerst Diane G. | Option Ex | 1,520 | 20.08 | 30,521 |
| 2022-07-15 | Liawatidewi Yakob (EVP Corp Admin Center) | Sale | 10,837 | 36.46 | 395,073 |
| 2022-07-15 | Liawatidewi Yakob (EVP Corp Admin Center) | Option Ex | 10,837 | 19.79 | 214,464 |
| 2022-07-11 | Gerst Diane G. | Sale | 1,521 | 36.26 | 55,145 |
| 2022-07-11 | Gerst Diane G. | Option Ex | 1,521 | 20.08 | 30,541 |
| 2022-07-05 | Gerst Diane G. | Sale | 1,813 | 35.00 | 63,460 |
| 2022-07-05 | Gerst Diane G. | Option Ex | 1,813 | 20.08 | 36,405 |
| 2022-07-01 | Petersen Floyd F. | Sale | 500 | 34.78 | 17,391 |
| 2022-06-30 | Gerst Diane G. | Sale | 5,146 | 35.00 | 180,110 |
| 2022-06-30 | Gerst Diane G. | Option Ex | 5,146 | 20.05 | 103,203 |
| 2022-06-30 | Peters William J (CFO, EVP & Treasurer) | Sale | 18,386 | 34.95 | 642,590 |
| 2022-06-30 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 18,386 | 14.95 | 274,870 |
| 2022-06-17 | Peters William J (CFO, EVP & Treasurer) | Sale | 5,512 | 32.05 | 176,681 |
| 2022-06-06 | Lee Howard | Sale | 10,291 | 37.79 | 388,855 |
| 2022-06-06 | Lee Howard | Option Ex | 10,291 | 17.11 | 176,079 |
| 2022-06-01 | Petersen Floyd F. | Sale | 500 | 37.23 | 18,614 |
| 2022-05-23 | Lee Howard | Sale | 10,000 | 34.93 | 349,320 |
| 2022-05-23 | Lee Howard | Option Ex | 10,000 | 17.11 | 171,100 |
| 2022-05-20 | Luo Mary Z. (CEO & Chief Scientific Officer) | Sale | 10,650 | 34.21 | 364,368 |
| 2022-05-19 | Luo Mary Z. (CEO & Chief Scientific Officer) | Sale | 41,730 | 34.02 | 1,419,612 |
| 2022-05-18 | Petersen Floyd F. | Sale | 9,924 | 35.05 | 347,826 |
| 2022-05-18 | Petersen Floyd F. | Option Ex | 20,291 | 17.11 | 347,179 |
| 2022-05-18 | Luo Mary Z. (CEO & Chief Scientific Officer) | Sale | 67,046 | 34.84 | 2,336,016 |
| 2022-05-17 | Luo Mary Z. (CEO & Chief Scientific Officer) | Sale | 50,376 | 35.94 | 1,810,463 |
| 2022-05-16 | Luo Mary Z. (CEO & Chief Scientific Officer) | Sale | 68,069 | 36.00 | 2,450,211 |
| 2022-05-16 | Zasloff Michael A | Sale | 10,291 | 35.61 | 366,503 |
| 2022-05-16 | Zasloff Michael A | Option Ex | 10,291 | 17.11 | 176,079 |
| 2022-05-02 | Petersen Floyd F. | Sale | 295 | 35.33 | 10,422 |
| 2022-04-01 | Petersen Floyd F. | Sale | 500 | 36.97 | 18,486 |
| 2022-03-16 | Peters William J (CFO, EVP & Treasurer) | Sale | 50,777 | 34.15 | 1,733,780 |
| 2022-03-16 | Peters William J (CFO, EVP & Treasurer) | Option Ex | 50,777 | 14.40 | 731,188 |
| 2022-03-16 | Zasloff Michael A | Sale | 10,000 | 33.71 | 337,070 |
| 2022-03-16 | Zasloff Michael A | Option Ex | 10,000 | 17.11 | 171,100 |
Insider trading activities including stock purchases, stock sales, and option exercises of AMPH listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Amphastar Pharmaceuticals, Inc. (symbol AMPH, CIK number 1297184) see the Securities and Exchange Commission (SEC) website.