Spero Therapeutics, Inc. - SPRO
Insiders (Form 4) · last 180 days · showing up to 200 transactions
· Form 144 is shown in the SEC filings tab
· Updating…
Visible: 0
Transaction codes:
P = Open-market purchase ·
S = Open-market sale ·
A = Grant/award ·
M = Exercise/conversion of derivative ·
G = Gift ·
F = Tax withholding ·
J = Other ·
A/D:
A = Acquired (buy/receive) ·
D = Disposed (sell/give)
| Filed | Owner | Title | Code | A/D | Shares | Price | Value | Shares after | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Feb 09, 2026 | See Remarks | S | D | 50,816.0 | 2.36 | 119,925.76 | 1,012,091.0 | View | |
| Feb 09, 2026 | See Remarks | S | D | 37,101.0 | 2.36 | 87,558.36 | 1,062,907.0 | View | |
| Feb 09, 2026 | Chief Operating Officer | S | D | 18,652.0 | 2.36 | 44,018.72 | 742,506.0 | View | |
| Feb 05, 2026 | Chief Operating Officer | A | A | 137,000.0 | 0.0 | 0.0 | 137,000.0 | View | |
| Feb 05, 2026 | Chief Operating Officer | S | D | 3,471.0 | 2.24 | 7,775.04 | 761,158.0 | View | |
| Feb 05, 2026 | Chief Operating Officer | S | D | 24,224.0 | 2.14 | 51,839.36 | 764,629.0 | View | |
| Feb 05, 2026 | Chief Operating Officer | S | D | 18,891.0 | 2.2 | 41,560.2 | 788,853.0 | View | |
| Feb 05, 2026 | Chief Operating Officer | A | A | 68,000.0 | 0.0 | 0.0 | 807,744.0 | View | |
| Feb 04, 2026 | See Remarks | A | A | 498,000.0 | 0.0 | 0.0 | 498,000.0 | View | |
| Feb 04, 2026 | See Remarks | S | D | 18,442.0 | 2.2 | 40,572.4 | 1,100,008.0 | View | |
| Feb 04, 2026 | See Remarks | A | A | 249,000.0 | 0.0 | 0.0 | 1,118,450.0 | View | |
| Nov 12, 2025 | See Remarks | S | D | 40,270.0 | 2.37 | 95,439.9 | 869,450.0 | View |