RAJAVELU ESTHER (See Remarks) sold 1.6% of their position (18.44K shares) of SPERO THERAPEUTICS, INC. on the open market
Open‑market sale worth $40.6K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 1 sale
Filed: 2/4/2026ACC: 0001193125-26-038184
Officer· See Remarks
Since Feb 2026
+728.56K
Net shares
Net buyer
$40.6K
Total sold
1
Open market trades
0B · 1S
3
Total transactions
747K acquired · 18.44K disposed
Non-Derivative Transactions2
Common Stock
Direct
Shares
+249K
Price / share
—
Trade value
—
% of position
28.6%
2/2/2026
869.45K→1.12M
Common Stock
Direct
Shares
−18.44K
Price / share
$2.20
Trade value
$40.57K
% of position
1.6%
2/2/2026
1.12M→1.10M
Total
Net shares
+230.56K
Net value
-$40.57K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 2/2/2026 | A · Award | +249K | — | — | 28.6% | 869.45K | 1.12M |
| Common Stock Direct | 2/2/2026 | S · Sale | −18.44K | $2.20 | $40.57K | 1.6% | 1.12M | 1.10M |
| Total | +230.56K | -$40.57K | ||||||
Derivative Transactions1
Stock Option (Right to Buy)
Direct
Converts to
Common Stock
498K shares
Shares
+498K
Strike price
2.23
Held after
498K
Exercisable
—
2/2/2026
| Security | Converts To | Date | Type | Shares | Strike Price | Exercisable | Held After |
|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy) Direct | Common Stock498K shares | 2/2/2026 | A · Award | +498K | 2.23 | — | 498K |