Henry R Slack
CIK 1192331 · Executive Chairman · last filed 2025-08-27
Henry R Slack is an Executive Chairman who has filed 51 SEC Form 4 insider transactions across 2 companies since 2014. The most recent filing, for ALCO, was dated Mar 9, 2026. Across all open-market trades the lifetime net is −$842.6K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.6M across reported positions. 5 SEC filings were submitted jointly with W R GRACE & CO.
"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.
ALCO 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
FT MYERS, FL 33935
Holdings By Company
Recent Filings
51 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-09 | ALCO | Notice (144) | −35,188 | -$1.41M | EDGAR |
| 2025-08-27 | ALCO | Sell (S) | −6,461 | -$222.3K | EDGAR |
| 2025-08-25 | ALCO | Notice (144/A) | −31,250 | -$1.03M | EDGAR |
| 2025-08-19 | ALCO | Sell (S) | −24,789 | -$813.8K | EDGAR |
| 2025-08-15 | ALCO | Notice (144) | −32,000 | -$1.04M | EDGAR |
| 2023-10-03 | ALCO | Grant (A) | +755 | $0 | EDGAR |
| 2023-07-05 | ALCO | Grant (A) | +731 | $0 | EDGAR |
| 2023-04-04 | ALCO | Grant (A) | +778 | $0 | EDGAR |
| 2023-01-04 | ALCO | Grant (A) | +787 | $18.8K | EDGAR |
| 2022-10-04 | ALCO | Grant (A) | +637 | $18.8K | 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.