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SPERO THERAPEUTICS INC (SPRO) Stock Ownership and Short Interest

USA - Nasdaq - NASDAQ:SPRO - US84833T1034 - Common Stock

2.45 USD
-0.06 (-2.39%)
Last: 1/13/2026, 8:00:02 PM
2.45 USD
0 (0%)
After Hours: 1/13/2026, 8:00:02 PM
SPRO Ownership Chart.SPRO Ownership Chart: showing Insider, Institutional ownership and shares available to the public.SPRO Ownership.InsiderInstitutionalPublic



Shares Outstanding56.34M
Float43.42M
Float Short Interest Percentage2.43%
Owners (insider)2.43%
Owners (institutional)16.1%
Owners (insider) change-0.73%
Owners (institutional) change-0.16%
SPRO Institutional Ownership HistorySPRO Institutional Ownership HistorySPRO Institutional Ownership History Sep 2021 Mar 2022 Sep 2022 Mar 2023 Sep 2023 Mar 2024 Sep 2024 Mar 2025 Sep 2025 5M 10M 15M 20M
SPRO Historical Insider Transactions ChartSPRO Historical Insider Buy and Sell Transactions ChartSPRO Historical Insider Transactions Feb 2025 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 0 500K 1M
Date Name Type Shares Price Amount
Nov 7, 2025 Rajavelu Esther Open Market Sale 40270 2.37 $ 95,439.90
Aug 28, 2025 Mahadevia Ankit Open Market Sale 6572 1.97 $ 12,946.84
Aug 28, 2025 Keutzer Timothy Open Market Sale 1695 1.97 $ 3,339.15
Jun 12, 2025 Mahadevia Ankit Grant 20000 0.00 $ 0.00
Jun 12, 2025 Deshpande Milind Grant 20000 0.00 $ 0.00
Jun 12, 2025 Jackson Scott Thomas Grant 20000 0.00 $ 0.00
Jun 12, 2025 VINK PATRICK V.J.J. Grant 20000 0.00 $ 0.00
Jun 12, 2025 Pottage John C Jr Grant 20000 0.00 $ 0.00
Jun 12, 2025 Smith Cynthia Grant 20000 0.00 $ 0.00
Jun 12, 2025 THOMAS FRANK E Grant 20000 0.00 $ 0.00
Jun 12, 2025 Tregoning Kathleen Grant 20000 0.00 $ 0.00
Feb 5, 2025 Shukla Sath Open Market Sale 155333 0.78 $ 121,159.74
Feb 5, 2025 Mahadevia Ankit Open Market Sale 69219 0.78 $ 53,990.82
Feb 5, 2025 Keutzer Timothy Open Market Sale 56537 0.78 $ 44,098.86
Feb 5, 2025 Rajavelu Esther Open Market Sale 20689 0.78 $ 16,137.42
Feb 3, 2025 Shukla Sath Grant 751407 0.00 $ 0.00
Feb 3, 2025 Keutzer Timothy Grant 266139 0.00 $ 0.00
Feb 3, 2025 Rajavelu Esther Grant 366139 0.00 $ 0.00