WINDSOR JAMES BRIAN
SEC insider (Form 3/4/5 filer). CIK 0001790933. President and CEO at Aileron Therapeutics, Inc. (ALRN). 5 reported Form 4/5 transactions since Sep 2024; latest on May 8, 2026. Located in AUSTIN, TX.
Companies WINDSOR JAMES BRIAN has filed insider reports for
- Aileron Therapeutics, Inc. (ALRN): Officer, President and CEO
WINDSOR JAMES BRIAN
CIK: 0001790933
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Aileron Therapeutics, Inc.
Discretionary Trading P&L
Holdings
Transaction History (5 total)
- May 8, 2026RNTX
Rein Therapeutics, Inc.
AwardDirectStock Option (Right to Buy)
150K shares- - Apr 30, 2026RNTX
Rein Therapeutics, Inc.
PurchaseDirect25K shares at avg. $1.00$25K - Dec 5, 2024ALRN
Aileron Therapeutics, Inc.
PurchaseIndirect239 shares at avg. $2.24$535.36 - Dec 5, 2024ALRN
Aileron Therapeutics, Inc.
PurchaseIndirect161 shares at avg. $2.25$362.25 - Dec 2, 2024ALRN
Aileron Therapeutics, Inc.
AwardDirectStock Option (right to buy)
517.5K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 8, 2026 |  RNTX Rein Therapeutics, Inc. | Award Stock Option (Right to Buy) | 150,000 | - | - | Direct |
| Apr 30, 2026 | RNTX Rein Therapeutics, Inc. | Purchase | 25,000 | $1.00 | $25,000 | Direct |
| Dec 5, 2024 | ALRN Aileron Therapeutics, Inc. | Purchase | 239 | $2.24 | $535 | Indirect |
| Dec 5, 2024 | ALRN Aileron Therapeutics, Inc. | Purchase | 161 | $2.25 | $362 | Indirect |
| Dec 2, 2024 | ALRN Aileron Therapeutics, Inc. | Award Stock Option (right to buy) | 517,500 | - | - | Direct |
1-5 of 5 transactions