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Spero Therapeutics, Inc. (SPRO)

NasdaqGS - NasdaqGS Real-time price. Currency in USD
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1.7700-0.0600 (-3.28%)
At close: 04:00PM EST
1.7900 +0.02 (+1.13%)
After hours: 04:10PM EST

Major holders

Currency in USD
23.35%% of shares held by all insiders
38.72%% of shares held by institutions
50.52%% of float held by institutions
94Number of institutions holding shares

Top institutional holders

HolderSharesDate reported% outValue
Aquilo Capital Management, LLC3,403,21029 Sept 20229.70%6,023,681
AWM Investment Company, Inc.2,300,40029 Sept 20226.56%4,071,707
BVF Inc.1,929,37629 Sept 20225.50%3,414,995
Anson Funds Management LP1,473,87229 Sept 20224.20%2,608,753
Atlas Venture Associates IX, LLC1,376,96829 Sept 20223.93%2,437,233
Vanguard Group, Inc. (The)1,053,72329 Sept 20223.00%1,865,089
Atlas Venture Life Science Advisors, LLC 1,031,16029 Sept 20222.94%1,825,153
Alphabet Inc.889,97929 Sept 20222.54%1,575,262
Rock Springs Capital Management, LP770,71029 Sept 20222.20%1,364,156
Murchinson Ltd.762,70029 Sept 20222.17%1,349,978

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund677,88829 Jun 20221.93%1,199,861
Vanguard Extended Market Index Fund387,10329 Jun 20221.10%685,172
iShares NASDAQ Biotechnology ETF188,93029 Sept 20220.54%334,406
Fidelity Extended Market Index Fund160,58730 Oct 20220.46%284,238
iShares Micro Cap ETF63,14629 Sept 20220.18%111,768
Vanguard Explorer Fund, Inc.54,30730 Jul 20220.15%96,123
DFA U.S. Small Cap Series45,20530 Jul 20220.13%80,012
iShares Core S&P Total U.S. Stock Market ETF39,93829 Sept 20220.11%70,690
Fidelity Total Market Index Fund39,00430 Oct 20220.11%69,037
Fidelity Series Total Market Index Fund30,55330 Oct 20220.09%54,078