SPRO - Spero Therapeutics, Inc.

NasdaqGS - NasdaqGS Real-time price. Currency in USD
Insider roster
Insider transactions

Major holders

Currency in USD
Breakdown
18.67%% of shares held by all insiders
27.38%% of shares held by institutions
33.66%% of float held by institutions
78Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Anson Funds Management LP3,344,86230 Mar 20236.36%5,953,854
Vanguard Group, Inc. (The)1,426,57130 Mar 20232.71%2,539,296
Atlas Venture Associates IX, LLC1,376,96830 Mar 20232.62%2,451,003
AWM Investment Company, Inc.1,300,40030 Mar 20232.47%2,314,711
Atlas Venture Life Science Advisors, LLC 1,031,16030 Mar 20231.96%1,835,464
Alphabet Inc.889,97930 Mar 20231.69%1,584,162
Murchinson Ltd.805,62130 Mar 20231.53%1,434,005
Rock Springs Capital Management, LP669,53330 Mar 20231.27%1,191,768
Millennium Management Llc494,54130 Mar 20230.94%880,282
Blackrock Inc.489,81330 Mar 20230.93%871,867

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund617,53130 Dec 20221.17%1,099,205
Vanguard Extended Market Index Fund387,76830 Dec 20220.74%690,227
Fidelity Extended Market Index Fund159,92227 Feb 20230.30%284,661
iShares Micro Cap ETF66,16327 Feb 20230.13%117,770
Fidelity Total Market Index Fund39,00427 Feb 20230.07%69,427
Fidelity Series Total Market Index Fund37,76727 Feb 20230.07%67,225
iShares Core S&P Total U.S. Stock Market ETF36,96227 Feb 20230.07%65,792
Schwab Capital Trust-Total Stock Market Index Fund28,56530 Jan 20230.05%50,845
Vanguard Institutional Index-Inst Total Stock Market Ind19,68930 Dec 20220.04%35,046
Vanguard Balanced Index Fund19,23830 Dec 20220.04%34,243