William A. Heyburn
CIK 1859732 · View on SEC EDGAR ↗
First SEC filing: May 17, 2021 · Latest: June 18, 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 8, 2026 | SRTA | S | 31,671 | $5.87 | $185,909 | 1,548,997 | — | — | 0.7% (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 |
|---|---|---|---|---|---|---|---|
| Sept. 16, 2021 | SRTA | Stock Option (right to buy) | Class A common stock, par value $0.0001 per share (5,000) | $0.18 | Nov. 16, 2028 | 5,000 | Disposed |
| Aug. 16, 2021 | SRTA | Stock Option (right to buy) | Class A common stock, par value $0.0001 per share (75,000) | $0.18 | Nov. 16, 2028 | 75,000 | Disposed |
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.
SRTA
CEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $516,667 | — | $4,224,970 | — | $541,000 | — | $43,533 | $5,326,170 |
| 2024 | $500,000 | — | $4,471,258 | — | $405,000 | — | $26,616 | $5,402,874 |
| 2023 | $450,000 | — | — | — | $421,875 | — | $38,563 | $910,438 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.