Heyburn William A.
Director · Officer · SRTA, BLDE
As of 2026-09-16, Heyburn William A. has 29 Form 4 transactions on record across 2 companies — 12 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in June in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-08 | SRTA | Sale | 31,671 @ $5.87 | $186K | −2.0% of holding | 1,548,997 | Form 4 |
| 2025-12-09 | SRTA | Purchase | 17,000 @ $4.47 | $76K | +1.2% of holding | 1,403,436 | Form 4 |
| 2025-08-04 | BLDE | Sale | 46,918 @ $4.94 | $232K | −3.4% of holding | 1,340,845 | Form 4 |
| 2025-06-09 | BLDE | Sale | 100,000 @ $4.07 | $407K | −6.8% of holding | 1,360,002 | Form 4 |
| 2025-01-07 | BLDE | Sale | 900 @ $5.00 | $5K | −0.1% of holding | 1,222,220 | Form 4 |
| 2025-01-06 | BLDE | Sale | 103,670 @ $5.02 | $521K | −7.8% of holding | 1,223,120 | Form 4 |
| 2024-12-09 | BLDE | Sale | 39,285 @ $5.02 | $197K | −2.9% of holding | 1,336,826 | Form 4 |
22 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-09-08 | SRTA | Withheld for tax | 31,671 | 1,678,348 | Form 4 |
| 2026-07-31 | SRTA | Withheld for tax | 199,209 | 1,710,019 | Form 4 |
| 2026-07-30 | SRTA | Award / grant | 179,160 | 1,909,228 | Form 4 |
| 2026-07-30 | SRTA | Award / grant | 181,071 | 1,730,068 | Form 4 |
| 2026-04-24 | SRTA | Withheld for tax | 301,731 | 1,580,668 | Form 4 |
| 2026-04-23 | SRTA | Award / grant | 545,625 | 1,882,399 | Form 4 |
| 2026-03-08 | SRTA | Withheld for tax | 31,314 | 1,336,774 | Form 4 |
| 2025-12-10 | SRTA | Withheld for tax | 35,348 | 1,368,088 | Form 4 |
| 2025-11-03 | SRTA | Withheld for tax | 100,133 | 1,386,436 | Form 4 |
| 2025-10-31 | SRTA | Award / grant | 181,072 | 1,486,569 | Form 4 |
| 2025-09-10 | SRTA | Withheld for tax | 35,348 | 1,305,497 | Form 4 |
| 2025-08-01 | BLDE | Withheld for tax | 76,177 | 1,387,763 | Form 4 |
| 2025-08-01 | BLDE | Award / grant | 139,286 | 1,463,940 | Form 4 |
| 2025-06-10 | BLDE | Withheld for tax | 35,348 | 1,324,654 | Form 4 |
| 2025-03-13 | BLDE | Withheld for tax | 124,396 | 1,495,681 | Form 4 |
| 2025-03-13 | BLDE | Withheld for tax | 35,679 | 1,460,002 | Form 4 |
| 2025-03-13 | BLDE | Award / grant | 222,857 | 1,620,077 | Form 4 |
| 2025-01-08 | BLDE | Option exercise | 175,000 | 1,397,220 | Form 4 |
| 2025-01-08 | BLDE | Option exercise | 175,000 | 0 | Form 4 |
| 2024-12-20 | BLDE | Option exercise | 25,312 | 1,326,790 | Form 4 |
| 2024-12-20 | BLDE | Option exercise | 25,312 | 175,000 | Form 4 |
| 2024-12-11 | BLDE | Withheld for tax | 35,348 | 1,301,478 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.