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Disclosery

SPRO SPERO THERAPEUTICS INC

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COM (common), issuer CIK 1701108

39 managers (39 13F filers) reported a position in SPRO shares at 2025-03-31, 15,108,016 shares in all. 1 filer opened a position and 12 filers sold out during the quarter.

Managers
39
13F filers
39
New
1
Added
9
Reduced
10
Sold out
12
Shares held by filers
15,108,016

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Anson Funds Management LPin group Anson Funds Management LP3,798,932$2.74M0.65%-40,95413F-HR/ATimelineGroup
Pfizer Inc2,362,348$1.7M0.34%013F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC1,763,620$1.27M<0.01%013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC970,907$699K<0.01%-134,68413F-HRTimeline
Alphabet Inc.in group Alphabet Inc.889,979$641K0.04%013F-HRTimelineGroup
Murchinson Ltd.873,910$629K0.09%013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC871,212$626K<0.01%-168,71013F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC801,277$577K0.11%013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC524,869$378K<0.01%+43,74113F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.482,082$347K<0.01%-3,27013F-HRTimelineGroup
MONIMUS CAPITAL MANAGEMENT, LP310,908$224K0.19%013F-HRTimeline
Atlas Venture Life Science Advisors, LLC305,255$220K0.04%013F-HRTimeline
MACKENZIE FINANCIAL CORP209,031$151K<0.01%+21,47213F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC154,800$111K<0.01%-30,00013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP148,911$107K<0.01%013F-HRTimelineGroup
DAFNA Capital Management LLC125,000$90K0.03%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP100,924$72.7K<0.01%+14,47713F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC92,939$66.9K<0.01%+37,88813F-HR/ATimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC61,316$44.1K<0.01%-111,55613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO60,817$43.8K<0.01%-80713F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC56,000$40.3K<0.01%+6,80013F-HRTimelineGroup
Three Seasons Wealth, LLC30,000$21.6K0.01%013F-HRTimeline
DLK Investment Management, LLC29,825$21.5K0.01%+87013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co28,565$20.6K<0.01%013F-HR/ATimelineGroup
EP Wealth Advisors, LLC16,500$11.9K<0.01%new13F-HRTimeline
Texas Yale Capital Corp.10,000$7.2K<0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY6,971$5.02K<0.01%013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/5,565$4.01K<0.01%+1813F-HRTimelineGroup
FMR LLCin group FMR LLC5,056$3.64K<0.01%+76713F-HRTimelineGroup
SIMPLEX TRADING, LLC5,098$3K<0.01%-1213F-HRTimeline
UBS Group AGin group UBS Group AG2,826$2.04K<0.01%+2,68513F-HRTimelineGroup
Cullen/Frost Bankers, Inc.in group Cullen/Frost Bankers, Inc.2,000$1.44K<0.01%013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN200$144<0.01%013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\151$109<0.01%-5,00013F-HRTimelineGroup
NewEdge Advisors, LLC100$72<0.01%013F-HRTimeline
SBI Securities Co., Ltd.60$43<0.01%-15313F-HRTimeline
CoreCap Advisors, LLC50$36<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS12$9<0.01%013F-HRTimelineGroup
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.