Brennan David R
Director · INSM
As of 2026-09-27, Brennan David R has 9 Form 4 transactions on record across 1 company — 6 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.
Reconstructed holdings
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 |
|---|---|---|---|---|---|---|---|
| 2026-09-09 | INSM | Sale | 25,000 @ $124.00 | $3.1M | −38.9% of holding | 39,238 | Form 4 |
8 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-05-13 | INSM | Award / grant | 3,305 | 64,238 | Form 4 |
| 2026-05-13 | INSM | Award / grant | 3,305 | 64,238 | Form 4 |
| 2026-02-23 | INSM | Gift | 6,000 | 60,933 | Form 4 |
| 2025-11-06 | INSM | Gift | 60,000 | 60,000 | Form 4 |
| 2025-11-06 | INSM | Gift | 60,000 | 66,933 | Form 4 |
| 2025-05-15 | INSM | Award / grant | 5,058 | 126,933 | Form 4 |
| 2025-05-15 | INSM | Award / grant | 5,058 | 126,933 | Form 4 |
| 2024-05-13 | INSM | Award / grant | 13,162 | 121,875 | 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.