Spero Therapeutics Inc.
SPRO | NASDAQ
$1.36
+$0.22 (+19.30%)
At close: Sep 22, 2026, 4:00 PM ET
$1.35
-$0.01 (-0.74%)
After-hours:
Sep 22, 2026, 7:46 PM ET
Institutional Ownership
Net OutflowTotal Institutions
55
Total Ownership
36.04%
Capital Flow
-$915.98K
Shares Change
-476.16K
Ownership Distribution
Institutions (36.04%)
Others (63.96%)
Institutional Sentiment
Overall: neutralEquity Sentiment & Activity
bullishNew Positions
8
Increased Positions
20
Reduced Positions
11
Closed Positions
14
New (8)
Increased (20)
Reduced (11)
Closed (14)
Options Sentiment & Activity
bearishPut/Call Ratio
1.698
Call Flow
64,500
Put Flow
109,500
Calls (37%)
Puts (63%)
Super Investors
| Super Investor / Fund | Ownership | Portfolio Weight | Shares | Market Value | |
|---|---|---|---|---|---|
| Point72 Asset Management LP | 0.10% +36.92% | < 0.01% | 59.67K | 73.99K |
Top Shareholders
| Institution | Ownership | Portfolio Weight | Shares | Market Value | |
|---|---|---|---|---|---|
| Gsk PLC | 16.04% -2.20% | 3.59% +33.93% | 9.19M 0.00% | 21.51M +0.43% | |
| Pfizer Inc | 4.12% -2.20% | 2.31% -0.97% | 2.36M 0.00% | 5.5M 0.00% | |
| Vanguard Capital Management LLC | 3.14% +100.00% | < 0.01% +100.00% | 1.8M +100.00% | 4.21M +100.00% |
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