RNTX insider buying and SEC filings, explained
Aileron Therapeutics, Inc. · CIK 1420565
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$177K
Insiders who bought
2
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| May 21–27, 2026 | Open-market purchase | Rickenbach Josef H. Von (Director) bought 47,060 shares between May 21 and May 27 at about $1.06 ($50K) in an open-market purchase. Holdings up 305% to 62,514 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 28, 2026 |
| Apr 30, 2026 | Other purchase | James Brian Windsor (CEO and Director) bought 25,000 Common stock , $0.001 par value at $1.00 ($25K) in a public offering. Holdings up 999%+ to 27,046 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 13, 2026 |
| Nov 14, 2025 | Purchase (code P) | Travis W. Cocke (10% owner) bought 104,183 shares indirectly (by entity) at about $1.22 ($127K), reported as a purchase (code P). Holdings by entity up 13% to 926,441 shares. Not marked as a 10b5-1 plan trade. Filed jointly with 4 other reporting owners. | SEC filing Filed Nov 18, 2025 |
1 routine transaction (such as a grant, option exercise or tax withholding) is 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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