Stephen Mayo
CIK 1849061 · View on SEC EDGAR ↗
Insider
First SEC filing: March 17, 2021 · Latest: June 5, 2026
On this page
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-123,208
+ 19 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
19 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 12, 2026 | SRPT | S | 7,239 | $17.02 | $123,208 | 1,765 Direct | -80.40% | Disposed | 15.1% (price as of 2026-08-19) |
| March 5, 2024 | SRPT | S | 3,135 | $122.96 | $385,480 | 6,621 Direct | -32.13% | Disposed | -84.1% (price as of 2026-08-19) |
| Nov. 17, 2022 | SRPT | S | 858 | $109.92 | $94,311 | 6,387 Direct | -11.84% | Disposed | -82.2% (price as of 2026-08-19) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 18, 2026 | ALLO | Stock Option (Right to buy) | Common Stock (144,400) | $2.00 | June 18, 2036 | 144,400 | Acquired |
| May 29, 2026 | MRK | Phantom Stock | Common Stock (1,853) | — | — | 1,853 | Acquired |
| May 30, 2025 | MRK | Phantom Stock | Common Stock (2,863) | — | — | 2,863 | Acquired |
| March 10, 2025 | SRPT | Stock Options (right to buy) | Common Stock (4,792) | $99.69 | March 10, 2035 | 4,792 | Acquired |
| May 31, 2024 | MRK | Phantom Stock | Common Stock (1,752) | — | — | 1,752 | Acquired |
| March 1, 2024 | SRPT | Stock Option (right to buy) | Common Stock (3,679) | $128.67 | March 1, 2034 | 3,679 | Acquired |
| May 26, 2023 | MRK | Phantom Stock | Common Stock (1,981) | — | — | 1,981 | Acquired |
| March 6, 2023 | SRPT | Stock Option (right to buy) | Common Stock (3,257) | $155.99 | March 6, 2033 | 3,257 | Acquired |
| May 27, 2022 | MRK | Phantom Stock | Common Stock (2,364) | — | — | 2,364 | Acquired |
| March 7, 2022 | SRPT | Stock Option (right to buy) | Common Stock (5,077) | $80.42 | March 7, 2032 | 5,077 | Acquired |
| Nov. 16, 2021 | SRPT | Stock Option (right to buy) | Common Stock (8,238) | $83.00 | Nov. 16, 2031 | 8,238 | Acquired |
| May 28, 2021 | MRK | Phantom Stock | Common Stock (2,635) | — | — | 2,635 | Acquired |
| March 15, 2021 | MRK | Phantom Stock | Common Stock (120) | — | — | 120 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 17, 2021 | MRK | Common Stock | 100 | Direct |