Sara Bonstein
CIK 1604019 · View on SEC EDGAR ↗
First SEC filing: June 5, 2026 · Latest: June 5, 2026
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 3, 2026 | INSM | S | 2,404 | $102.27 | $245,857 | 69,082 | — | — | 25.5% (price as of 2026-08-20) |
| May 16, 2022 | INSM | S | 1,433 | $18.51 | $26,525 | 54,683 Direct | -2.55% | Disposed | 593.6% (price as of 2026-08-20) |
| Jan. 11, 2022 | INSM | S | 1,154 | $25.11 | $28,977 | 35,979 Direct | -3.11% | Disposed | 411.3% (price as of 2026-08-20) |
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 11, 2026 | XLO | Stock Option (right to buy) | Common Stock (5,000) | $7.99 | June 10, 2036 | 5,000 | Acquired |
| June 15, 2022 | XLO | Stock Option (right to buy) | Common Stock (13,200) | $2.28 | June 14, 2032 | 13,200 | Acquired |
| May 11, 2022 | INSM | Stock Option (right to buy) | Common Stock (94,960) | $17.07 | May 11, 2032 | 94,960 | Acquired |
| Jan. 6, 2022 | INSM | Stock Option (right to buy) | Common Stock (62,840) | $26.43 | Jan. 6, 2032 | 62,840 | Acquired |
| May 12, 2021 | INSM | Stock Option (right to buy) | Common Stock (68,640) | $26.46 | May 12, 2031 | 68,640 | Acquired |
| Jan. 7, 2021 | INSM | Stock Option (right to buy) | Common Stock (45,600) | $34.03 | Jan. 7, 2031 | 45,600 | Acquired |
| May 12, 2020 | INSM | Stock Option (right to buy) | Common Stock (34,890) | $24.70 | May 12, 2030 | 34,890 | Acquired |
| Feb. 3, 2020 | INSM | Stock Option (right to buy) | Common Stock (91,640) | $28.88 | Feb. 3, 2030 | 91,640 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
INSM
CFO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $583,190 | — | $874,966 | $2,624,787 | $510,292 | — | $24,194 | $4,617,429 |
| 2024 | $530,170 | — | $749,990 | $2,250,057 | $462,250 | — | $19,538 | $4,012,005 |
| 2023 | $511,010 | — | $1,312,464 | $2,436,713 | $276,000 | — | $23,395 | $4,559,582 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.