SEC Form 4 · accession 0000899243-18-000561
Spero Therapeutics, Inc. · SPRO
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David A. Melnick
Officer — Chief Medical Officer
Period of report
Jan 4, 2018
Accepted (ET)
Jan 5, 2018 · 10:11 am EST
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001701108
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F1 | $12.14 | Jan 4, 2018 | A | 135,000 | A | — | Jan 3, 2028 | Common Stock | 135,000 | 135,000 | D |
Explanation of responses
- F1The shares underlying this option vest as to 25% on January 4, 2019, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service through the applicable vesting date.