Nathaniel Sisitsky
CIK 1225738 · View on SEC EDGAR ↗
First SEC filing: March 31, 2026 · Latest: March 31, 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 15, 2026 | QDEL | A | 73,435 | — | — | 73,435 Direct | — | Acquired | (price as of 2026-08-20) |
| April 15, 2026 | QDEL | A | 73,434 | — | — | 73,434 Direct | — | Acquired | (price as of 2026-08-20) |
| Dec. 11, 2025 | STAA | F | 2,616 | $24.68 | $64,563 | 22,812 Direct | -10.29% | Disposed | -1.7% (price as of 2026-08-20) |
| March 14, 2025 | STAA | A | 8,798 | — | — | 8,798 Direct | — | Acquired | (price as of 2026-08-20) |
| March 14, 2025 | STAA | A | 43,989 | — | — | 43,989 Direct | — | Acquired | (price as of 2026-08-20) |
| March 12, 2025 | STAA | M | 5,827 | — | — | 11,654 Direct | -33.33% | Disposed | (price as of 2026-08-20) |
| March 12, 2025 | STAA | F | 2,334 | $18.00 | $42,012 | 25,428 Direct | -8.41% | Disposed | 34.7% (price as of 2026-08-20) |
| March 12, 2025 | STAA | M | 5,827 | — | — | 27,762 Direct | +26.56% | Acquired | (price as of 2026-08-20) |
| March 12, 2024 | STAA | A | 15,657 | — | — | 15,657 Direct | — | Acquired | (price as of 2026-08-20) |
| March 12, 2024 | STAA | A | 17,481 | — | — | 17,481 Direct | — | Acquired | (price as of 2026-08-20) |
| Dec. 11, 2023 | STAA | A | 39,860 | — | — | 39,860 Direct | — | Acquired | (price as of 2026-08-20) |
| Dec. 11, 2023 | STAA | A | 21,935 | — | — | 21,935 Direct | — | Acquired | (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 |
|---|---|---|---|---|---|---|---|
| April 15, 2026 | QDEL | Restricted Stock Units | Common Stock (73,435) | — | — | 73,435 | Acquired |
| April 15, 2026 | QDEL | Non-Qualified Stock Options | Common Stock (73,434) | $17.49 | April 15, 2036 | 73,434 | Acquired |
| March 14, 2025 | STAA | Restricted Stock Units | Common Stock (8,798) | — | — | 8,798 | Acquired |
| March 14, 2025 | STAA | Restricted Stock Units | Common Stock (43,989) | — | — | 43,989 | Acquired |
| March 12, 2025 | STAA | Restricted Stock Units | Common Stock (5,827) | — | — | 5,827 | Disposed |
| March 12, 2024 | STAA | Common Stock Options | Common Stock (15,657) | $37.64 | March 11, 2034 | 15,657 | Acquired |
| March 12, 2024 | STAA | Restricted Stock Units | Common Stock (17,481) | — | — | 17,481 | Acquired |
| Dec. 11, 2023 | STAA | Common Stock Options | Common Stock (39,860) | $32.14 | Dec. 10, 2033 | 39,860 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 31, 2026 | QDEL | No securities beneficially owned | 0 | 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 | $488,750 | $75,000 | — | — | $381,150 | — | $21,026 | $2,765,962 |
| 2024 | $470,000 | — | $1,315,970 | $328,991 | — | — | $16,974 | $2,131,935 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.