Stephen F. Mahoney
CIK 1741389 · President and CEO · last filed 2026-03-09
Stephen F. Mahoney is a President and CEO who has filed 16 SEC Form 4 insider transactions across 3 companies since 2018. The most recent filing shows the insider had shares withheld for taxes covering $223.6K of VRDN on Mar 9, 2026. Across all open-market trades the lifetime net is +$460.7K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $6.6M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$6.57M
3
16
$460.7K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| VRDN | President and CEO | 33,349 | $16.35 | $545.3K | $499.3K | 5 | 2026-03-09 |
| Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | See Remarks | 17,264 | $11.19 | $193.2K | -$38.6K | 7 | 2022-12-02 |
| KNSA | President & COO | 116,187 | $51.89 | $6.03M | $0 | 4 | 2019-09-19 |
Recent Filings
16 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-09 | VRDN | Tax (F) | −7,408 | -$223.6K | EDGAR |
| 2026-03-04 | VRDN | Mixed | +10,730 | -$223.6K | EDGAR |
| 2025-03-04 | VRDN | Grant (A) | — | $0 | EDGAR |
| 2024-09-30 | VRDN | Buy (P) | +21,400 | $499.3K | EDGAR |
| 2023-11-01 | VRDN | Grant (A) | — | $0 | EDGAR |
| 2022-12-02 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Grant (A) | +3,000 | $2.8K | EDGAR |
| 2022-08-01 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-05-19 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-02-17 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2021-09-20 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Sell (S) | −5,736 | -$38.6K | EDGAR |