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ISSUER PROFILE · CIK 0001701108

Spero Therapeutics, Inc.SPRO

1 13D/G filings 1 distinct filers 0 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
1
1 SC
Distinct filers
1
single filer
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.86
as of 2026-03-31

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $102K
Point72 Asset Mgmt

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2018-07-17 SC GLAXOSMITHKLINE PLC view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-03-31 605,311 1.86 +12.6%
2026-03-13 537,411 1.72 -6.4%
2026-02-27 574,027 2.12 -19.8%
2026-02-13 715,694 1.68 -24.0%
2026-01-30 941,659 4.01 -9.4%
2026-01-15 1,039,613 4.43 +9.8%
2025-12-31 946,767 3.85 -10.3%
2025-12-15 1,056,013 3.51 +27.9%

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