Michael G. Grey

Sits on 3 boards. Last updated September 28, 2026

Time on boards

Boards served
3
Current seats
3
Board service
10 years
Director since
2023

10 years of board service in total across 3 boards, counting each seat separately. Longest: Mirum Pharmaceuticals Inc., 3 years.

3 years ยท Since 2023
Spruce Biosciences Inc. Director ยท Executive Chairman
3 years ยท Since 2023
OnKure Therapeutics Inc. Director ยท Executive Chairman
3 years ยท Since 2023

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
Dec 19, 2025 Mirum Pharmaceuticals Inc. Option exercise +50,000 $2.94 $147,000
Dec 19, 2025 Mirum Pharmaceuticals Inc. Open-market sale โˆ’50,000 $78.00 $3,900,000
Dec 1, 2025 Mirum Pharmaceuticals Inc. Option exercise +50,000 $2.94 $147,000
Dec 1, 2025 Mirum Pharmaceuticals Inc. Open-market sale โˆ’50,000 $74.00 $3,700,000
Nov 21, 2025 Mirum Pharmaceuticals Inc. Option exercise +50,000 $2.94 $147,000
Nov 21, 2025 Mirum Pharmaceuticals Inc. Open-market sale โˆ’50,000 $70.00 $3,500,000
Sep 27, 2024 Mirum Pharmaceuticals Inc. Gift โˆ’102,788 โ€” โ€”
Sep 14, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,216 $2.94 $41,795
Sep 14, 2023 Mirum Pharmaceuticals Inc. Open-market sale โˆ’14,216 $32.00 $454,912
Sep 13, 2023 Mirum Pharmaceuticals Inc. Option exercise +392 $2.94 $1,152
Sep 13, 2023 Mirum Pharmaceuticals Inc. Open-market sale โˆ’392 $32.00 $12,544
Jul 26, 2023 OnKure Therapeutics Inc. Gift โˆ’50,000 โ€” โ€”
Jun 8, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,608 $2.94 $42,948
Jun 8, 2023 Mirum Pharmaceuticals Inc. Open-market sale โˆ’14,608 $29.00 $423,632
May 3, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,608 $2.94 $42,948

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