Common Stock, Shares, Outstanding of Spero Therapeutics, Inc. from 31 Dec 2016 to 30 Sep 2025

Taxonomy & unit
us-gaap: shares
Description
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
Summary
Spero Therapeutics, Inc. quarterly Common Stock, Shares, Outstanding in shares history and change rate from 31 Dec 2016 to 30 Sep 2025.
  • Spero Therapeutics, Inc. Common Stock, Shares, Outstanding for the quarter ending 30 Sep 2025 was 56,311,795, a 3.7% increase year-over-year.
Source SEC data
View on sec.gov
Common Stock, Shares, Outstanding, Quarterly (shares)
Common Stock, Shares, Outstanding, YoY Quarterly Change (%)

Spero Therapeutics, Inc. Quarterly Common Stock, Shares, Outstanding (shares)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q3 2025 56,311,795 +1,997,380 +3.7% 30 Sep 2025 10-Q 13 Nov 2025 2025 Q3
Q2 2025 56,187,308 +2,178,169 +4% 30 Jun 2025 10-Q 12 Aug 2025 2025 Q2
Q1 2025 55,900,641 +2,031,502 +3.8% 31 Mar 2025 10-Q 13 May 2025 2025 Q1
Q4 2024 54,593,527 +1,593,847 +3% 31 Dec 2024 10-Q 13 Nov 2025 2025 Q3
Q3 2024 54,314,415 +1,315,098 +2.5% 30 Sep 2024 10-Q 14 Nov 2024 2024 Q3
Q2 2024 54,009,139 +1,437,326 +2.7% 30 Jun 2024 10-Q 05 Aug 2024 2024 Q2
Q1 2024 53,869,139 +1,297,326 +2.5% 31 Mar 2024 10-Q 15 May 2024 2024 Q1
Q4 2023 52,999,680 +543,485 +1% 31 Dec 2023 10-K 27 Mar 2025 2024 FY
Q3 2023 52,999,317 +10,142,694 +24% 30 Sep 2023 10-Q 13 Nov 2023 2023 Q3
Q2 2023 52,571,813 +17,504,336 +50% 30 Jun 2023 10-Q 10 Aug 2023 2023 Q2
Q1 2023 52,571,813 +19,816,254 +60% 31 Mar 2023 10-Q 11 May 2023 2023 Q1
Q4 2022 52,456,195 +20,062,457 +62% 31 Dec 2022 10-K 13 Mar 2024 2023 FY
Q3 2022 42,856,623 +10,636,272 +33% 30 Sep 2022 10-Q 14 Nov 2022 2022 Q3
Q2 2022 35,067,477 +5,368,330 +18% 30 Jun 2022 10-Q 10 Aug 2022 2022 Q2
Q1 2022 32,755,559 +3,091,613 +10% 31 Mar 2022 10-Q 16 May 2022 2022 Q1
Q4 2021 32,393,738 +3,133,491 +11% 31 Dec 2021 10-K 30 Mar 2023 2022 FY
Q3 2021 32,220,351 +6,250,246 +24% 30 Sep 2021 10-Q 10 Nov 2021 2021 Q3
Q2 2021 29,699,147 +8,685,052 +41% 30 Jun 2021 10-Q 05 Aug 2021 2021 Q2
Q1 2021 29,663,946 +9,335,606 +46% 31 Mar 2021 10-Q 06 May 2021 2021 Q1
Q4 2020 29,260,247 +10,069,552 +52% 31 Dec 2020 10-K 31 Mar 2022 2021 FY
Q3 2020 25,970,105 +7,307,075 +39% 30 Sep 2020 10-Q 05 Nov 2020 2020 Q3
Q2 2020 21,014,095 +2,363,720 +13% 30 Jun 2020 10-Q 06 Aug 2020 2020 Q2
Q1 2020 20,328,340 +2,993,274 +17% 31 Mar 2020 10-Q 08 May 2020 2020 Q1
Q4 2019 19,190,695 +1,984,733 +12% 31 Dec 2019 10-K 11 Mar 2021 2020 FY
Q3 2019 18,663,030 +480,536 +2.6% 30 Sep 2019 10-Q 04 Nov 2019 2019 Q3
Q2 2019 18,650,375 +4,272,622 +30% 30 Jun 2019 10-Q 08 Aug 2019 2019 Q2
Q1 2019 17,335,066 +2,965,884 +21% 31 Mar 2019 10-Q 09 May 2019 2019 Q1
Q4 2018 17,205,962 +2,836,780 +20% 31 Dec 2018 10-K 16 Mar 2020 2019 FY
Q3 2018 18,182,494 +17,847,213 +5323% 30 Sep 2018 10-Q 08 Nov 2018 2018 Q3
Q2 2018 14,377,753 30 Jun 2018 10-Q 09 Aug 2018 2018 Q2
Q1 2018 14,369,182 31 Mar 2018 10-Q 10 May 2018 2018 Q1
Q4 2017 14,369,182 +14,369,182 31 Dec 2017 10-K 14 Mar 2019 2018 FY
Q3 2017 335,281 30 Sep 2017 10-Q 14 Dec 2017 2017 Q3
Q4 2016 0 31 Dec 2016 10-K 02 Apr 2018 2017 FY
* An asterisk sign (*) next to the value indicates that the value is likely invalid.