ACLX insider buying and SEC filings, explained
Arcellx, Inc. · CIK 1786205
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$14.2M
Planned sales (10b5-1)
$481K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Feb 27, 2026 | Sale | Rami Elghandour (CEO and Director) sold 89,916 shares at about $113.92 ($10.2M). Holdings down 25% to 276,051 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 27, 2026 |
| Feb 25, 2026 | Sale | Michelle Gilson (CFO) sold 11,219 shares at about $113.82 ($1.3M). Holdings down 25% to 33,938 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 25, 2026 |
| Feb 19, 2026 | Sale | Michelle Gilson (CFO) sold 8,384 shares at about $68.29 ($573K). Holdings down 16% to 45,157 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 19, 2026 |
| Feb 17, 2026 | Sale | Michelle Gilson (CFO) sold 11,291 shares at about $69.50 ($785K). Holdings down 17% to 53,541 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 18, 2026 |
| Jan 20, 2026 | Planned (10b5-1) | David Charles Lubner (Director) sold 6,000 shares at $75.00 ($450K), marked as a 10b5-1 plan trade. Holdings down 22% to 21,659 shares. | SEC filing Filed Jan 20, 2026 |
| Jan 14, 2026 | Sale | Christopher Heery (Chief Medical Officer) sold 5,882 shares at about $68.51 ($403K). Holdings down 20% to 23,749 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 14, 2026 |
| Jan 13, 2026 | Sale | Christopher Heery (Chief Medical Officer) sold 7,437 shares at about $65.51 ($487K). Holdings down 20% to 29,631 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 13, 2026 |
| Jan 12, 2026 | Sale | Christopher Heery (Chief Medical Officer) sold 6,131 shares at about $64.15 ($393K). Holdings down 14% to 37,068 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 12, 2026 |
| Nov 17, 2025 | Planned (10b5-1) | Christopher Heery (Chief Medical Officer) sold 340 shares at $90.00 ($31K), marked as a 10b5-1 plan trade. Holdings down 54% to 284 shares. | SEC filing Filed Nov 17, 2025 |
26 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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