SPRO - Spero Therapeutics, Inc.

NasdaqGS - NasdaqGS Real Time Price. Currency in USD

Major Holders

Currency in USD
Breakdown
23.71%% of Shares Held by All Insider
53.59%% of Shares Held by Institutions
70.24%% of Float Held by Institutions
80Number of Institutions Holding Shares

Top Institutional Holders

HolderSharesDate Reported% OutValue
Atlas Venture Associates IX, LLC1,376,968Mar 30, 20197.86%17,638,960
Aquilo Capital Management, LLC1,054,356Mar 30, 20196.02%13,506,300
Artal Group S.A.600,000Mar 30, 20193.42%7,686,000
AWM Investment Company, Inc.562,296Mar 30, 20193.21%7,203,011
Rock Springs Capital Management, LP525,000Mar 30, 20193.00%6,725,250
Orbimed Advisors LLC.507,471Mar 30, 20192.90%6,500,703
VHCP Management II, LLC474,015Mar 30, 20192.70%6,072,132
BVF Inc.460,706Mar 30, 20192.63%5,901,643
Blackrock Inc.421,087Mar 30, 20192.40%5,394,124
Vanguard Group, Inc. (The)418,390Mar 30, 20192.39%5,359,575

Top Mutual Fund Holders

HolderSharesDate Reported% OutValue
Fidelity Select Portfolios - Biotechnology389,252Mar 30, 20192.22%4,986,318
Vanguard Total Stock Market Index Fund284,720Sep 29, 20181.62%2,992,407
iShares Russell 2000 ETF159,338Mar 30, 20190.91%2,041,119
Vanguard Extended Market Index Fund121,258Sep 29, 20180.69%1,274,421
JNL Series Trust-JNL/Multi Manager Small Cap GrowthFd99,000Sep 29, 20180.56%1,040,490
iShares Russell 2000 Value ETF72,900Mar 30, 20190.42%933,849
Bridgeway Funds Inc-Ultra Small Company Market Fund72,379Sep 29, 20180.41%760,703
Advanced Series Tr-AST Small Cap Value Port67,500Sep 29, 20180.39%709,425
Fidelity Extended Market Index Fund43,453Mar 30, 20190.25%556,632
State Street Var Ins Ser Fd-State Street Total Return V.I.S. Fd33,919Sep 29, 20180.19%356,488