Type / Class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
55.7M
Number of holders
87
Total 13F shares, excl. options
19.1M
Shares change
+940K
Total reported value, excl. options
$370M
Value change
+$23.9M
Put/Call ratio
1.45
Number of buys
53
Number of sells
-36
Price
$19.39

Significant Holders of Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) as of Q4 2020

107 filings reported holding SPRO - Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share as of Q4 2020.
Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) has 87 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 19.1M shares of 55.7M outstanding shares and own 34.27% of the company stock.
Largest 10 shareholders include Aquilo Capital Management, LLC (3.93M shares), BVF INC/IL (2.24M shares), BlackRock Inc. (1.73M shares), Atlas Venture Associates IX, LLC (1.38M shares), Atlas Venture Associates IX, LLC (1.38M shares), Rock Springs Capital Management LP (1.24M shares), VANGUARD GROUP INC (1.13M shares), Alphabet Inc. (890K shares), Novo Holdings A/S (577K shares), and Artal Group S.A. (500K shares).
This table shows the top 87 institutional shareholders of the company equity. This data is sourced directly from the SEC via 13F filings.
Investor Option Weight % Change % Value $ * Price $ Shares Share Change Activity Report Period
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.