Michael Bookman
CIK 1840339 · View on SEC EDGAR ↗
First SEC filing: Jan. 26, 2021 · Latest: Jan. 26, 2021
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 3, 2021 | IMRX | P | 1,402 | $15.00 | $21,030 | 1,402 Direct | — | Acquired | -65.2% (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 |
|---|---|---|---|---|---|---|---|
| July 29, 2021 | IMRX | Stock Option | Class A Common Stock (101,116) | $15.00 | July 28, 2031 | 101,116 | Disposed |
| April 20, 2021 | KRRO | Restricted Stock Unit | Common Stock (30,000) | — | — | 30,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Jan. 26, 2021 | KRRO | Common Stock | 9,236 | Direct |
| Jan. 26, 2021 | KRRO | Stock Option→ Common Stock (111,350) | 111,350 | Direct |
| Jan. 26, 2021 | KRRO | Stock Option→ Common Stock (32,500) | 32,500 | Direct |
| Jan. 26, 2021 | KRRO | Stock Option→ Common Stock (65,000) | 65,000 | Direct |
| Jan. 26, 2021 | KRRO | Stock Option→ Common Stock (10,000) | 10,000 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $502,089 | $241,003 | — | $132,803 | — | — | $14,468 | $890,362 |
| 2024 | $482,778 | $193,111 | — | $398,393 | — | — | $14,070 | $1,088,351 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.