WILLIAM P SCULLY
CIK 1045463 · last filed 2026-06-05
WILLIAM P SCULLY is a corporate insider who has filed 15 SEC Form 4 insider transactions across 2 companies since 2014. The most recent filing shows the insider bought $465.3K of PRTA on Jun 5, 2026. Across all open-market trades the lifetime net is +$5.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $8.4M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$8.38M
2
15
$5.26M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| PRTA | 10%+ Owner | 1,016,000 | $8.25 | $8.38M | $4.67M | 4 | 2026-06-05 |
| YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | 10%+ Owner | 2,933,333 | — | — | $591.1K | 11 | 2016-09-14 |
Recent Filings
15 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-05 | PRTA | Buy (P) | +50,000 | $465.3K | EDGAR |
| 2026-06-03 | PRTA | Buy (P) | +50,000 | $471.3K | EDGAR |
| 2026-05-26 | PRTA | Buy (P) | +100,000 | $981.3K | EDGAR |
| 2025-05-02 | PRTA | Mixed | −110,264 | $2.75M | EDGAR |
| 2016-09-14 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Sell (S) | −68,333 | -$22.5K | EDGAR |
| 2016-09-12 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Sell (S) | −165,000 | -$57.4K | EDGAR |
| 2016-01-07 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Buy (P) | +47,150 | $101.5K | EDGAR |
| 2016-01-07 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Buy (P) | +25,000 | $55.1K | EDGAR |
| 2015-09-21 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Buy (P) | +31,833 | $67.0K | EDGAR |
| 2015-09-16 | YIELD10 BIOSCIENCE, INC. (MBLX) Delisted | Buy (P) | +67,500 | $145.8K | EDGAR |