ISSUER PROFILE · CIK 0001701108
Spero Therapeutics, Inc.SPRO
6 13D/G filings
2 distinct filers
8 insider transactions (365d)
Cross-Reference Snapshot
Distinct filers
2
multi-activist cluster
Insiders (365d)
8
8 buys · 0 sales
Latest short DTC
1.51
as of 2026-10-15
Institutional Consensus · 2025-12-31
Held by elite portfolio managers
1 holder · $102K
Point72 Asset Mgmt
13D/G Filings Timeline · 6 total
Form 4 Insider Transactions · last 365d
| Date | Insider | Role | Type | Shares | Price | Value |
|---|
| 2026-06-23 |
Deshpande Milind |
director |
Award |
10,000 |
— |
— |
| 2026-06-23 |
Deshpande Milind |
director |
Award |
20,000 |
$2.15 |
$43K |
| 2026-06-23 |
Tregoning Kathleen |
director |
Award |
10,000 |
— |
— |
| 2026-06-23 |
Tregoning Kathleen |
director |
Award |
20,000 |
$2.15 |
$43K |
| 2026-06-23 |
Smith Cynthia |
director |
Award |
10,000 |
— |
— |
| 2026-06-23 |
Smith Cynthia |
director |
Award |
20,000 |
$2.15 |
$43K |
| 2026-06-23 |
VINK PATRICK V.J.J. |
director |
Award |
10,000 |
— |
— |
| 2026-06-23 |
VINK PATRICK V.J.J. |
director |
Award |
20,000 |
$2.15 |
$43K |
FINRA Short Interest History
| Settlement | Short Interest | Days to Cover | % Δ vs prior |
|---|
| 2026-10-15 |
840,529 |
1.51 |
+5.8% |
| 2026-09-30 |
794,509 |
1.00 |
-18.6% |
| 2026-09-15 |
976,488 |
3.06 |
-19.3% |
| 2026-08-31 |
1,210,417 |
2.95 |
-16.3% |
| 2026-08-14 |
1,445,879 |
1.90 |
-4.5% |
| 2026-07-31 |
1,513,354 |
1.00 |
-28.4% |
| 2026-07-15 |
2,113,935 |
1.28 |
-26.2% |
| 2026-06-30 |
2,864,850 |
1.04 |
+56.4% |
| 2026-06-15 |
1,831,713 |
2.25 |
+7.3% |
| 2026-05-29 |
1,706,545 |
1.96 |
+3.6% |
| 2026-05-15 |
1,647,297 |
2.61 |
+39.6% |
| 2026-04-30 |
1,179,702 |
3.06 |
+59.9% |
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