Insider · CIK 0001378587
John C Pottage Jr.
Files at: SPRO. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 23, 2026 AForm 4 → | Jun 25, 6:55 pm EDT | Spero Therapeutics, Inc.SPRO | 10,000 | — | — | 85,000 | — |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 23, 2026 AForm 4 → | Jun 25, 6:55 pm EDT | Spero Therapeutics, Inc.SPRO | 20,000 | — | — | 20,000 | — | |
| Sep 21, 2018 AForm 4 → | Sep 21, 5:38 pm EDT | Spero Therapeutics, Inc.SPRO | 12,146 | — | — | 12,146 | — |