Michael G. Grey serves as Executive at BIOMARIN PHARMACEUTICAL INC, where they oversee executive responsibilities. Since joining the company, Michael G. Grey has executed 139 insider transactions totaling $24.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 19, 2025 involved exercising options for 50,000 shares valued at $147.0K.
Michael G. Grey currently holds 50,000 shares of BIOMARIN PHARMACEUTICAL INC (BMRN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Michael G. Grey has been a net seller of BMRN stock. They have purchased $94.8K and sold $24.8M worth of shares.
Michael G. Grey's most recent insider trade was on Dec 19, 2025, when they sold 50,000 shares at $2.94 per share.
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| $78.00 |
| Discretionary |
| Dec 1, 2025 | MIRM | $147.0K | Option Exercise | 50,000 | $2.94 | Discretionary |
| Dec 1, 2025 | MIRM | $3.7M | Sale | 50,000 | $74.00 | Discretionary |
| Nov 21, 2025 | MIRM | $147.0K | Option Exercise | 50,000 | $2.94 | Discretionary |
| Nov 21, 2025 | MIRM | $3.5M | Sale | 50,000 | $70.00 | Discretionary |
| Oct 6, 2023 | HZNP | $5.6M | Disposition | 48,031 | $116.50 | Discretionary |
| Oct 6, 2023 | HZNP | $1.2M | Disposition | 10,000 | $116.50 | Discretionary |
| Oct 6, 2023 | HZNP | $4.6M | Disposition | 39,361 | $116.50 | Discretionary |
| Sep 28, 2023 | HZNP | $319.2K | Option Exercise | 20,000 | $15.96 | Discretionary |
| Sep 14, 2023 | MIRM | $454.9K | Sale | 14,216 | $32.00 | Discretionary |
| Sep 14, 2023 | MIRM | $41.8K | Option Exercise | 14,216 | $2.94 | Discretionary |
| Sep 13, 2023 | MIRM | $1.2K | Option Exercise | 392 | $2.94 | Discretionary |
| Sep 13, 2023 | MIRM | $12.5K | Sale | 392 | $32.00 | Discretionary |
| Jul 26, 2023 | RPHM | $0 | Gift | 50,000 | $N/A | Discretionary |
| Jun 8, 2023 | MIRM | $42.9K | Option Exercise | 14,608 | $2.94 | Planned |
| Jun 8, 2023 | MIRM | $423.6K | Sale | 14,608 | $29.00 | Planned |
| May 3, 2023 | MIRM | $42.9K | Option Exercise | 14,608 | $2.94 | Planned |
| May 3, 2023 | MIRM | $409.0K | Sale | 14,608 | $28.00 | Planned |
| Apr 28, 2023 | HZNP | $0 | Option Exercise | 3,913 | $N/A | Discretionary |
| Aug 31, 2022 | RPHM | $98.5K | Option Exercise | 50,000 | $1.97 | Discretionary |
| Apr 29, 2022 | HZNP | $0 | Option Exercise | 4,223 | $N/A | Discretionary |
| Apr 29, 2022 | HZNP | $112.3K | Payment | 1,139 | $98.56 | Discretionary |
| Jul 22, 2021 | HZNP | $100.0K | Sale | 1,000 | $100.00 | Discretionary |
| Jul 22, 2021 | HZNP | $11.8K | Option Exercise | 5,000 | $2.37 | Discretionary |
| Jul 22, 2021 | HZNP | $400.2K | Sale | 4,000 | $100.05 | Discretionary |
| Apr 30, 2021 | HZNP | $283.2K | Payment | 2,993 | $94.62 | Discretionary |
| Apr 30, 2021 | HZNP | $0 | Option Exercise | 11,098 | $N/A | Discretionary |
| Apr 13, 2021 | RPHM | $0 | Conversion | 20,162 | $N/A | Discretionary |
| Apr 12, 2021 | HZNP | $1.4M | Sale | 15,000 | $90.28 | Discretionary |