Natalie Sacks
Insider
First SEC filing: July 22, 2021 · Latest: July 22, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 20, 2026 | CRBU | A | 45,000 | · | · | 45,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 20, 2025 | CRBU | A | 40,500 | · | · | 40,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 20, 2024 | CRBU | A | 39,500 | · | · | 39,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 21, 2022 | ZYME | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 20, 2021 | CRBU | A | 27,500 | · | · | 27,500 Direct | · | Acquired | (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 20, 2026 | CRBU | Option to purchase Common Stock | Common Stock | $1.80 | Feb. 19, 2036 | 45,000 | Acquired |
| Feb. 20, 2025 | CRBU | Option to purchase Common Stock | Common Stock | $1.41 | Feb. 19, 2035 | 40,500 | Acquired |
| Feb. 20, 2024 | CRBU | Option to purchase Common Stock | Common Stock | $6.81 | Feb. 19, 2034 | 39,500 | Acquired |
| Dec. 21, 2022 | ZYME | Stock Option (Right to Buy) | Common Stock | $8.75 | Dec. 20, 2032 | 25,000 | Acquired |
| Dec. 20, 2021 | CRBU | Option to purchase Common Stock | Common Stock | $15.16 | Dec. 19, 2031 | 27,500 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.