William H Armstrong III
CIK 1200799 · Chair of Board, President, CEO · last filed 2026-03-17
William H Armstrong III is a Chair of Board, President, CEO who has filed 86 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing shows the insider had shares withheld for taxes covering $31.8K of STRS on Mar 17, 2026. Across all open-market trades the lifetime net is +$79.7K, making them a net buyer over the disclosed history.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
STRS price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
SUITE 300
AUSTIN, TX 78701
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| STRATUS PROPERTIES INC (STRS) Delisted | Chair of Board, President, CEO | 687,122 | $19.32 | $13.28M | $79.7K | 82 | 2026-03-17 |
Recent Filings
86 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-17 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −984 | -$31.8K | EDGAR |
| 2026-02-23 | STRATUS PROPERTIES INC (STRS) Delisted | Grant (A) | +32,226 | $0 | EDGAR |
| 2026-02-17 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −5,691 | -$168.6K | EDGAR |
| 2025-03-18 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −2,782 | -$50.3K | EDGAR |
| 2025-02-18 | STRATUS PROPERTIES INC (STRS) Delisted | Mixed | +10,241 | -$139.6K | EDGAR |
| 2025-02-18 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −6,969 | -$138.7K | EDGAR |
| 2024-03-18 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −5,289 | -$119.1K | EDGAR |
| 2024-03-12 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −2,277 | -$51.1K | EDGAR |
| 2024-02-20 | STRATUS PROPERTIES INC (STRS) Delisted | Mixed | +21,487 | -$81.6K | EDGAR |
| 2023-05-16 | STRATUS PROPERTIES INC (STRS) Delisted | Tax (F) | −25,832 | -$519.7K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.