Spero Therapeutics Inc

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Spero Therapeutics Inc
TickerSPRO
CIK #0001701108
CUSIP84833T103
SectorLife Sciences - Pharmaceutical Preparations
Address675 Massachusetts Avenue 14th Floor, Cambridge, MA 02139
Source [EDGAR]
CIK Filing 2011 - 2025
[0001701108] 10-K
[0001701108] 10-Q
[0001701108] 3
[0001701108] 4
[0001701108] 8-K
[0001701108] D
[0001701108] SC 13D
[0001701108] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Anson Funds Management LP Spero Therapeutics Inc [2024-02-14] 81948.1
BlackRock Inc Spero Therapeutics Inc [2022-07-08] 2.1
Pfizer Inc Spero Therapeutics Inc [2021-07-09] 7.37
BlackRock Inc Spero Therapeutics Inc [2021-02-02] 6.4
Atlas Venture Fund X LP Spero Therapeutics Inc [2018-03-14] 7.2
RA Capital Management LLC Spero Therapeutics Inc [2018-02-14] 8.5
Lundbeckfond Invest A/S Spero Therapeutics Inc [2018-02-14] 7.6
GV 2015 LP Spero Therapeutics Inc [2018-02-14] 7.7
Atlas Venture Associates IX LP Spero Therapeutics Inc [2018-02-13] 0.58
FMR LLC Spero Therapeutics Inc [2018-02-13] 0.0
GlaxoSmithKline PLC Spero Therapeutics Inc [2017-11-16] 13.3
Merck & Co Inc Spero Therapeutics Inc [2017-11-15] 6.5
Biotechnology Value Fund L P Spero Therapeutics Inc [2017-11-09] 3.7
Form 3/4/5 Filer 2011 - 2025
Pottage John C Jr
Spero Therapeutics, Inc.
Tregoning Kathleen
Thomas Frank E
Smith Cynthia
Mahadevia Ankit
Deshpande Milind
Jackson Scott Thomas
VINK Patrick VJJ
Rajavelu Esther
Keutzer Timothy
Shukla Sath
Joseph Tamara L
Hamed Kamal
DiPalma Stephen J.
GSK plc
Aquilo Capital Management, LLC
Aquilo Capital, L.P.
Melnick David A.
Larkin Cristina
Formela Jean Francois
Parr Thomas R JR
Sendek Joel
Southwell David P
Breum Casper
Goyal Vikas
Halse Reza
Atlas Venture Associates IX, L.P.
Atlas Venture Fund IX, L.P.
Atlas Venture Associates IX, LLC
Lundbeckfond Invest A/S
GV 2015 LP
GV 2015 GP LLC
Alphabet Inc.
Form 13F Holdings
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Vanguard Group Inc [2025-06-30] SOLE 0 1,940,219
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Geode Capital Management LLC [2025-06-30] DFND 510,699 510,699
BlackRock, Inc. [2025-06-30] SOLE 433,897 434,768
Monimus Capital Management LP [2025-06-30] SOLE 310,908 310,908
Citadel Advisors LLC [2025-06-30] DFND 240,986 240,986
Informed Momentum Co LLC [2025-06-30] SOLE 239,140 239,140
Stonepine Capital Management LLC [2025-06-30] SOLE 156,888 156,888
State Street Corp [2025-06-30] DFND 153,451 153,451
Ionic Capital Management LLC [2025-06-30] DFND 150,000 150,000
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Susquehanna International Group LLP [2025-06-30] OTR 69,814 118,514
Bridgeway Capital Management LLC [2025-06-30] SOLE 114,800 114,800
Acadian Asset Management LLC [2025-06-30] DFND 112,889 112,889
Northern Trust Corp [2025-06-30] DFND 100,831 100,831
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Capital Asset Advisory Services LLC [2025-06-30] SOLE 0 32,548
Axxcess Wealth Management LLC [2025-06-30] SOLE 0 32,548
Quadrature Capital Ltd [2025-06-30] OTR 0 31,205
Simplex Trading LLC [2025-06-30] SOLE 30,322 30,322
Three Seasons Wealth, LLC [2025-06-30] SOLE 30,000 30,000
Charles Schwab Investment Management Inc [2025-06-30] SOLE 28,565 28,565
Cubist Systematic Strategies, LLC [2025-06-30] DFND 0 27,140
Invesco Ltd. [2025-06-30] DFND 0 14,968
Vanguard Group Inc [2025-06-30] DFND 0 10,162
Texas Yale Capital Corp [2025-06-30] SOLE 10,000 10,000
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