KEUTZER TIMOTHY (Chief Development Officer) sold 5.8% of their position (46.59K shares) of SPERO THERAPEUTICS, INC. on the open market
Open‑market sale worth $101.2K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 2/5/2026ACC: 0001193125-26-038441
Officer· Chief Development Officer
Since Jan 2020
+158.41K
Net shares
Net buyer
$101.2K
Total sold
3
Open market trades
0B · 3S
5
Total transactions
205K acquired · 46.59K disposed
Non-Derivative Transactions4
Common Stock
Direct
Shares
+68K
Price / share
—
Trade value
—
% of position
9.2%
2/2/2026
739.74K→807.74K
Common Stock
Direct
Shares
−18.89K
Price / share
$2.20
Trade value
$41.56K
% of position
2.3%
2/2/2026
807.74K→788.85K
Common Stock
Direct
Shares
−24.22K
Price / share
$2.14
Trade value
$51.84K
% of position
3.1%
2/3/2026
788.85K→764.63K
Common Stock
Direct
Shares
−3.47K
Price / share
$2.24
Trade value
$7.78K
% of position
0.5%
2/4/2026
764.63K→761.16K
Total
Net shares
+21.41K
Net value
-$101.17K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 2/2/2026 | A · Award | +68K | — | — | 9.2% | 739.74K | 807.74K |
| Common Stock Direct | 2/2/2026 | S · Sale | −18.89K | $2.20 | $41.56K | 2.3% | 807.74K | 788.85K |
| Common Stock Direct | 2/3/2026 | S · Sale | −24.22K | $2.14 | $51.84K | 3.1% | 788.85K | 764.63K |
| Common Stock Direct | 2/4/2026 | S · Sale | −3.47K | $2.24 | $7.78K | 0.5% | 764.63K | 761.16K |
| Total | +21.41K | -$101.17K | ||||||
Derivative Transactions1
Stock Option (Right to Buy)
Direct
Converts to
Common Stock
137K shares
Shares
+137K
Strike price
2.23
Held after
137K
Exercisable
—
2/2/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) Direct | Common Stock137K shares | 2/2/2026 | A · Award | +137K | 2.23 | — | 137K |