Joel Greenblatt's AMPH Position Overview
Joel Greenblatt (via Gotham Asset Management, LLC) currently holds 10,139 shares of Amphastar Pharmaceuticals, Inc. (AMPH) worth $204,605, representing 0.00% of the portfolio. First purchased in 2016-Q2, this long-term strategic position has been held for 21 quarters.
Based on 13F filings, Joel Greenblatt has maintained a strategic position in AMPH, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2022, adding 28,492 shares. Largest reduction occurred in Q1 2026, reducing 27,802 shares.
Analysis based on 13F filings available since 2013 Q2
Joel Greenblatt's Amphastar Pharmaceuticals (AMPH) Holding Value Over Time
Track share changes against reported price movement
Quarterly Amphastar Pharmaceuticals (AMPH) Trades by Joel Greenblatt
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q2 2026 | +10,139 | New Buy | 10,139 | $20.18 |
| Q1 2026 | -27,802 | Sold Out | 0 | $0.00 |
| Q4 2025 | +12,438 | Add 80.96% | 27,802 | $26.78 |
| Q3 2025 | +1,350 | Add 9.63% | 15,364 | $26.65 |
| Q2 2025 | +3,144 | Add 28.92% | 14,014 | $22.96 |
| Q1 2025 | -17,578 | Reduce 61.79% | 10,870 | $28.99 |
| Q4 2024 | -7,290 | Reduce 20.40% | 28,448 | $37.13 |
| Q3 2024 | +8,063 | Add 29.13% | 35,738 | $48.53 |
| Q2 2024 | -1,206 | Reduce 4.18% | 27,675 | $40.00 |
| Q1 2024 | +17,551 | Add 154.91% | 28,881 | $43.91 |
| Q4 2023 | +6,799 | Add 150.06% | 11,330 | $61.85 |
| Q3 2023 | -460 | Reduce 9.22% | 4,531 | $45.99 |
| Q2 2023 | -3,506 | Reduce 41.26% | 4,991 | $57.47 |
| Q1 2023 | -11,765 | Reduce 58.06% | 8,497 | $37.50 |
| Q4 2022 | -2,770 | Reduce 12.03% | 20,262 | $28.02 |
| Q3 2022 | -16,400 | Reduce 41.59% | 23,032 | $28.09 |
| Q2 2022 | +28,492 | Add 260.44% | 39,432 | $34.79 |
| Q1 2022 | +10,940 | New Buy | 10,940 | $35.92 |
| Q4 2016 | -25,915 | Sold Out | 0 | $0.00 |
| Q3 2016 | +6,336 | Add 32.36% | 25,915 | $18.99 |
| Q2 2016 | +19,579 | New Buy | 19,579 | $16.14 |
Joel Greenblatt's Amphastar Pharmaceuticals Investment FAQs
Joel Greenblatt first purchased Amphastar Pharmaceuticals, Inc. (AMPH) in Q2 2016, acquiring 19,579 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Joel Greenblatt has held Amphastar Pharmaceuticals, Inc. (AMPH) for 21 quarters since Q2 2016.
Joel Greenblatt's largest addition to Amphastar Pharmaceuticals, Inc. (AMPH) was in Q2 2022, adding 39,432 shares worth $1.37 M.
According to the latest 13F filing for Q2 2026, Joel Greenblatt's firm, Gotham Asset Management, LLC, owns 10,139 shares of Amphastar Pharmaceuticals, Inc. (AMPH), valued at approximately $204,605.
As of the Q2 2026 filing, Amphastar Pharmaceuticals, Inc. (AMPH) represents approximately 0.00% of Joel Greenblatt's publicly disclosed stock portfolio, making it one of their key holdings.
Joel Greenblatt's peak holding in Amphastar Pharmaceuticals, Inc. (AMPH) was 39,432 shares, as reported at the end of Q2 2022.