Madryn Asset Management, LP
Ten-percent owner · STIM
As of 2026-09-16, Madryn Asset Management, LP has 60 Form 4 transactions on record across 1 company — 40 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market purchases filed in March in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $0
- Indirect $6.3M
| STIM | indirect | 2,269,073 sh | $6.3M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-26 | — | Purchase | 37,500,000 @ $0.04 | $1.5M | +368152.4% of holding | 37,510,186 | Form 4 |
| 2026-03-26 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2026-03-26 | — | Purchase | 37,187 | — | +0.1% of holding | 37,547,373 | Form 4 |
| 2026-03-26 | — | Purchase | 1,500,000 | — | ownership Δ n/a | 1,500,000 | Form 4 |
| 2026-03-26 | — | Purchase | 1,575,810 | — | ownership Δ n/a | 1,575,810 | Form 4 |
| 2026-03-26 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2026-03-26 | — | Purchase | 335,000 | — | +22.3% of holding | 1,835,000 | Form 4 |
| 2026-03-26 | — | Purchase | 37,187 | — | +0.1% of holding | 37,547,373 | Form 4 |
| 2026-03-26 | — | Purchase | 1,500,000 | — | ownership Δ n/a | 1,500,000 | Form 4 |
| 2026-03-26 | — | Purchase | 1,575,810 | — | ownership Δ n/a | 1,575,810 | Form 4 |
| 2026-03-26 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2026-03-26 | — | Purchase | 37,187 | — | +0.1% of holding | 37,547,373 | Form 4 |
| 2026-03-26 | — | Purchase | 1,500,000 | — | ownership Δ n/a | 1,500,000 | Form 4 |
| 2026-03-26 | — | Purchase | 1,575,810 | — | ownership Δ n/a | 1,575,810 | Form 4 |
| 2026-03-26 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2026-03-26 | — | Purchase | 335,000 | — | +22.3% of holding | 1,835,000 | Form 4 |
| 2026-03-26 | — | Purchase | 37,187 | — | +0.1% of holding | 37,547,373 | Form 4 |
| 2026-03-26 | — | Purchase | 1,500,000 | — | ownership Δ n/a | 1,500,000 | Form 4 |
| 2026-03-26 | — | Purchase | 1,575,810 | — | ownership Δ n/a | 1,575,810 | Form 4 |
| 2026-03-26 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2026-03-26 | — | Purchase | 335,000 | — | +22.3% of holding | 1,835,000 | Form 4 |
| 2026-03-26 | — | Purchase | 335,000 | — | +22.3% of holding | 1,835,000 | Form 4 |
| 2026-03-26 | — | Purchase | 37,187 | — | +0.1% of holding | 37,547,373 | Form 4 |
| 2026-03-26 | — | Purchase | 1,500,000 | — | ownership Δ n/a | 1,500,000 | Form 4 |
| 2026-03-26 | — | Purchase | 1,575,810 | — | ownership Δ n/a | 1,575,810 | Form 4 |
| 2026-03-26 | — | Purchase | 335,000 | — | +22.3% of holding | 1,835,000 | Form 4 |
| 2025-09-30 | — | Purchase | 545,335 | — | +36.7% of holding | 2,030,866 | Form 4 |
| 2025-09-30 | — | Purchase | 545,335 | — | +36.7% of holding | 2,030,866 | Form 4 |
| 2025-09-30 | — | Purchase | 545,335 | — | +36.7% of holding | 2,030,866 | Form 4 |
| 2025-09-30 | — | Purchase | 545,335 | — | +36.7% of holding | 2,030,866 | Form 4 |
| 2025-08-08 | STIM | Sale | 2,925,554 @ $3.72 | $10.9M | −14.4% of holding | 17,333,542 | Form 4 |
| 2025-08-08 | STIM | Sale | 381,640 @ $3.72 | $1.4M | −14.4% of holding | 2,261,168 | Form 4 |
| 2025-08-08 | STIM | Sale | 192,806 @ $3.72 | $717K | −14.4% of holding | 1,142,351 | Form 4 |
| 2025-03-31 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2025-03-31 | — | Purchase | 379,311 | — | +48.6% of holding | 1,159,880 | Form 4 |
| 2025-03-31 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2025-03-31 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2025-03-31 | — | Purchase | 379,311 | — | +48.6% of holding | 1,159,880 | Form 4 |
| 2025-03-31 | — | Purchase | 379,311 | — | +48.6% of holding | 1,159,880 | Form 4 |
| 2025-03-31 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2025-03-31 | — | Purchase | 379,311 | — | +48.6% of holding | 1,159,880 | Form 4 |
| 2025-03-31 | — | Purchase | — | — | ownership Δ n/a | — | Form 4 |
| 2025-03-31 | — | Purchase | 379,311 | — | +48.6% of holding | 1,159,880 | Form 4 |
17 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-06-15 | STIM | Other acquisition | 2,934 | 1,435,958 | Form 4 |
| 2026-06-15 | STIM | Other acquisition | 4,634 | 2,269,073 | Form 4 |
| 2026-06-15 | STIM | Other acquisition | 34,932 | 17,104,530 | Form 4 |
| 2026-05-28 | STIM | Other acquisition | 3,271 | 2,264,439 | Form 4 |
| 2026-05-28 | STIM | Other acquisition | 24,658 | 17,069,598 | Form 4 |
| 2026-05-28 | STIM | Other acquisition | 2,071 | 1,433,024 | Form 4 |
| 2025-09-30 | — | Disposition | — | 0 | Form 4 |
| 2025-09-30 | — | Disposition | — | 0 | Form 4 |
| 2025-09-30 | — | Disposition | — | 0 | Form 4 |
| 2025-09-30 | — | Disposition | — | 0 | Form 4 |
| 2025-07-10 | STIM | Gift | 337,312 | 1,430,953 | Form 4 |
| 2025-07-10 | STIM | Gift | 337,312 | 17,044,940 | Form 4 |
| 2025-03-31 | — | Disposition | — | — | Form 4 |
| 2025-03-31 | — | Disposition | — | — | Form 4 |
| 2025-03-31 | — | Disposition | — | — | Form 4 |
| 2025-03-31 | — | Disposition | — | — | Form 4 |
| 2025-03-31 | — | Disposition | — | — | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.