SPERO THERAPEUTICS INC (SPRO) Stock Ownership

NASDAQ:SPRO • US84833T1034

2.17 USD
-0.04 (-1.81%)
At close: Feb 27, 2026
2.17 USD
0 (0%)
After Hours: 2/27/2026, 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
Float43.27M
Float Short Interest Percentage2.18%
Owners (insider)2.43%
Owners (institutional)16.1%
Owners (insider) change1.43%
Owners (institutional) change87.04%
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 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 0 100K -100K 200K 300K
Date Name Type Shares Price Amount
Feb 6, 2026 Keutzer Timothy Open Market Sale 18652 2.36 $ 44,018.72
Feb 6, 2026 Rajavelu Esther Open Market Sale 87917 2.36 $ 207,484.12
Feb 2, 2026 Rajavelu Esther Grant 249000 0.00 $ 0.00
Feb 2, 2026 Rajavelu Esther Open Market Sale 18442 2.20 $ 40,572.40
Feb 2, 2026 Keutzer Timothy Grant 68000 0.00 $ 0.00
Feb 2, 2026 Keutzer Timothy Open Market Sale 46586 2.17 $ 101,174.60
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