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

Shareholder support

Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

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 −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 −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 −50,000 $70.00 $3,500,000
Sep 27, 2024 Mirum Pharmaceuticals Inc. Gift −102,788 — —
Sep 14, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,216 $2.94 $41,795
Sep 14, 2023 Mirum Pharmaceuticals Inc. Open-market sale −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 −392 $32.00 $12,544
Jul 26, 2023 OnKure Therapeutics Inc. Gift −50,000 — —
Jun 8, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,608 $2.94 $42,948
Jun 8, 2023 Mirum Pharmaceuticals Inc. Open-market sale −14,608 $29.00 $423,632
May 3, 2023 Mirum Pharmaceuticals Inc. Option exercise +14,608 $2.94 $42,948

Questions about Michael G. Grey

What boards is Michael G. Grey on?

Michael G. Grey sits on the boards of Mirum Pharmaceuticals Inc., OnKure Therapeutics Inc. and Spruce Biosciences Inc.

How long has Michael G. Grey served on boards?

Our records show at least 10 years of board service across 3 boards, the earliest from 2023.

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