Michael G. Grey
CIK: 0001240122
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (29 total)
- Aug 7, 2026OKUR
OnKure Therapeutics, Inc.
Award(A)DirectStock Option (right to buy)
22.4K shares- - Jun 15, 2026MIRM
Mirum Pharmaceuticals, Inc.
Award(A)DirectRestricted Stock Units
2K shares- - Jun 15, 2026MIRM
Mirum Pharmaceuticals, Inc.
Award(A)DirectStock Option (right to buy)
3.8K shares- - Jun 4, 2026OKUR
OnKure Therapeutics, Inc.
Award(A)DirectStock Option (right to buy)
7.7K shares- - May 21, 2026SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
1.7K shares- - Dec 19, 2025MIRM
Mirum Pharmaceuticals, Inc.
Sale(S)Direct50K shares at avg. $78.00$3.9M - Dec 19, 2025MIRM
Mirum Pharmaceuticals, Inc.
Exercise(M)Direct50K shares at avg. $2.94$147K - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (right to buy)
133 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
666 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (Right to Buy)
666 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
400 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (Right to Buy)
400 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (right to buy)
133 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
387 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (Right to Buy)
387 shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
1.3K shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (Right to Buy)
1.3K shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
1.5K shares- - Dec 11, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Disposition(D)DirectStock Option (Right to Buy)
1.5K shares- - Dec 1, 2025MIRM
Mirum Pharmaceuticals, Inc.
Exercise(M)Direct50K shares at avg. $2.94$147K - Dec 1, 2025MIRM
Mirum Pharmaceuticals, Inc.
Sale(S)Direct50K shares at avg. $74.00$3.7M - Nov 21, 2025MIRM
Mirum Pharmaceuticals, Inc.
Exercise(M)Direct50K shares at avg. $2.94$147K - Nov 21, 2025MIRM
Mirum Pharmaceuticals, Inc.
Sale(S)Direct50K shares at avg. $70.00$3.5M - Jul 22, 2025SPRB
SPRUCE BIOSCIENCES, INC.
Award(A)DirectStock Option (Right to Buy)
30K shares- - May 29, 2025MIRM
Mirum Pharmaceuticals, Inc.
Award(A)DirectStock Option (right to buy)
6.3K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 7, 2026 |  OKUR OnKure Therapeutics, Inc. | Award(A) Stock Option (right to buy) | 22,350 | - | - | Direct |
| Jun 15, 2026 |  MIRM Mirum Pharmaceuticals, Inc. | Award(A) Restricted Stock Units | 1,980 | - | - | Direct |
| Jun 15, 2026 | MIRM Mirum Pharmaceuticals, Inc. | Award(A) Stock Option (right to buy) | 3,772 | - | - | Direct |
| Jun 4, 2026 | OKUR OnKure Therapeutics, Inc. | Award(A) Stock Option (right to buy) | 7,650 | - | - | Direct |
| May 21, 2026 |  SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 1,700 | - | - | Direct |
| Dec 19, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Sale(S) | 50,000 | $78.00 | $3,900,000 | Direct |
| Dec 19, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Exercise(M) | 50,000 | $2.94 | $146,800 | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (right to buy) | 133 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 666 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (Right to Buy) | 666 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 400 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (Right to Buy) | 400 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (right to buy) | 133 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 387 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (Right to Buy) | 387 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 1,255 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (Right to Buy) | 1,255 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 1,499 | - | - | Direct |
| Dec 11, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Disposition(D) Stock Option (Right to Buy) | 1,499 | - | - | Direct |
| Dec 1, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Exercise(M) | 50,000 | $2.94 | $146,800 | Direct |
| Dec 1, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Sale(S) | 50,000 | $74.00 | $3,700,000 | Direct |
| Nov 21, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Exercise(M) | 50,000 | $2.94 | $146,800 | Direct |
| Nov 21, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Sale(S) | 50,000 | $70.00 | $3,500,000 | Direct |
| Jul 22, 2025 | SPRB SPRUCE BIOSCIENCES, INC. | Award(A) Stock Option (Right to Buy) | 30,000 | - | - | Direct |
| May 29, 2025 | MIRM Mirum Pharmaceuticals, Inc. | Award(A) Stock Option (right to buy) | 6,268 | - | - | Direct |
1-25 of 29 transactions
About GREY MICHAEL G
GREY MICHAEL G (SEC CIK 0001240122) files insider reports with the SEC as Director of OnKure Therapeutics, Inc. (OKUR), Director of Mirum Pharmaceuticals, Inc. (MIRM) and Executive Chairman of SPRUCE BIOSCIENCES, INC. (SPRB).
Signal8 holds 13 ownership filings by GREY MICHAEL G, all Form 4s, filed between Oct 1, 2024 and Aug 11, 2026. Those filings report 29 transactions, from Sep 27, 2024 to Aug 7, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on GREY MICHAEL G's filings is in BOULDER, CO.
Recent filings by GREY MICHAEL G
- Aug 7, 2026: Grant or award of OKUR derivative securities (Form 4, code A).
- Jun 15, 2026: Grants or awards of MIRM derivative securities (2 lines, Form 4, code A).
- Jun 4, 2026: Grant or award of OKUR derivative securities (Form 4, code A).
- May 21, 2026: Grant or award of SPRB derivative securities (Form 4, code A).
- Dec 19, 2025: Open-market sale of MIRM shares (Form 4, code S).
Other insiders filing for OnKure Therapeutics, Inc. (OKUR)
- Saccomano Nicholas A, President and CEO
- Leverone Jason A., Chief Financial Officer
- Manke Isaac, Director
- Mathers Edward T, Director
- Ratcliffe Liam, Director
- Phillips Andrew John, Director