Form 4 holding
Director
Spero Therapeutics, Inc.
- Security class
- Common Stock
- Shares / value
- 85,000
- Estimated value
- $198,900
- Report date
- 23 Jun 2026
- Price
- $2.34
- Ownership
- Direct
John C. Pottage Jr. - Director at Spero Therapeutics, Inc.
Issuer-level insider activity
- Role
- Director
- Issuer ticker
- SPRO on Nasdaq
- Entity type
- Individual
- Source filing history
- Open source filing history
Identity
Names, identifiers, and filing context for this profile.
1 identity field
Source evidence
Original filing metadata and source links for verification.
1 source field
No buys or sells have been reported by John C. Pottage Jr. since 05 Sep 2025
Reported holdings for John C. Pottage Jr. in Spero Therapeutics, Inc.
Form 4 holding
Director
Spero Therapeutics, Inc.
- Security class
- Stock Option (right to buy)
- Shares / value
- 20,000
- Estimated value
- Report date
- 23 Jun 2026
- Price
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
Transaction history for John C. Pottage Jr. in Spero Therapeutics, Inc.
| Sym | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares after | Date | Ownership |
|---|
* marks a reported price that did not pass the local price check.