Spero Therapeutics, Inc. - SPRO

Sector: Healthcare · Industry: Pharmaceutical Preparations
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Company profile

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Quarter snapshot

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Q1 2026 · Q4 2025
Value (USD)
Total reported value ($000)
$54.04M
QoQ value delta ($000)
+$4.591M (+9.28%)
Implied price effect (QoQ)
+0.37%
Shares
Total shares
23,117,320
QoQ shares delta
+1,886,221 (+8.88%)
Total shares held by funds (by quarter)

Market chart (SPRO)

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Top holders (Q1 2026)

Top 25 only Full list
Partial Q1 2026 data: 50 holders have filed so far. Prior holders are carried forward until their next 13F confirms a change.
Manager Value ($000) Shares % of 13F
GSK plc 21,506 9,190,606 3.59%
PFIZER INC 5,504 2,362,348 2.31%
VANGUARD GROUP INC 4,854 2,083,462 0.0%
VANGUARD CAPITAL MANAGEMENT LLC 4,211 1,799,880 0.0%
RENAISSANCE TECHNOLOGIES LLC 2,782 1,189,235 0.0%
Alphabet Inc. 2,082 889,979 0.05%
TWO SIGMA INVESTMENTS, LP 2,072 885,631 0.0%
GEODE CAPITAL MANAGEMENT, LLC 1,217 519,922 0.0%
BlackRock, Inc. 1,013 433,202 0.0%
CITADEL ADVISORS LLC 996 425,658 0.0%
Anson Funds Management LP 987 421,956 0.09%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 892 381,615 0.0%
GSA CAPITAL PARTNERS LLP 651 278,304 0.04%
VANGUARD FIDUCIARY TRUST CO 618 264,115 0.0%
TWO SIGMA ADVISERS, LP 504 216,600 0.0%
STATE STREET CORP 502 214,751 0.0%
Ionic Capital Management LLC 458 195,939 0.03%
Squarepoint Ops LLC 454 194,301 0.0%
JANE STREET GROUP, LLC 427 182,645 0.0%
MARSHALL WACE, LLP 367 157,072 0.0%
NORTHERN TRUST CORP 283 120,984 0.0%
BRIDGEWAY CAPITAL MANAGEMENT, LLC 268 114,800 0.01%
Shay Capital LLC 164 70,354 0.01%
Point72 Asset Management, L.P. 139 59,668 0.0%
Invesco Ltd. 106 45,374 0.0%