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Spero Therapeutics, Inc. (SPRO)

NasdaqGS - NasdaqGS Real-time price. Currency in USD
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1.9300+0.0200 (+1.05%)
At close: 04:00PM EST
1.9400 +0.01 (+0.52%)
After hours: 05:19PM EST
Insider roster
Insider transactions

Major holders

Currency in USD
Breakdown
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%6,568,195
AWM Investment Company, Inc.2,300,40029 Sept 20226.56%4,439,771
BVF Inc.1,929,37629 Sept 20225.50%3,723,695
Anson Funds Management LP1,473,87229 Sept 20224.20%2,844,572
Atlas Venture Associates IX, LLC1,376,96829 Sept 20223.93%2,657,548
Vanguard Group, Inc. (The)1,053,72329 Sept 20223.00%2,033,685
Atlas Venture Life Science Advisors, LLC 1,031,16029 Sept 20222.94%1,990,138
Alphabet Inc.889,97929 Sept 20222.54%1,717,659
Rock Springs Capital Management, LP770,71029 Sept 20222.20%1,487,470
Murchinson Ltd.762,70029 Sept 20222.17%1,472,010

Top mutual fund holders

HolderSharesDate reported% outValue
Vanguard Total Stock Market Index Fund677,88829 Jun 20221.93%1,308,323
Vanguard Extended Market Index Fund387,10329 Jun 20221.10%747,108
iShares NASDAQ Biotechnology ETF188,93029 Sept 20220.54%364,634
Fidelity Extended Market Index Fund160,83930 Aug 20220.46%310,419
Vanguard Variable Insurance Fund-Small Company Growth77,60529 Jun 20220.22%149,777
iShares Micro Cap ETF63,14629 Sept 20220.18%121,871
Vanguard Explorer Fund, Inc.54,30730 Jul 20220.15%104,812
DFA U.S. Small Cap Series45,20530 Jul 20220.13%87,245
Fidelity Total Market Index Fund39,00430 Aug 20220.11%75,277
iShares Core S&P Total U.S. Stock Market ETF37,83430 Aug 20220.11%73,019