Type / Class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
55.7M
Number of holders
79
Total 13F shares, excl. options
19.8M
Shares change
+144K
Total reported value, excl. options
$316M
Value change
+$2.06M
Put/Call ratio
1.08
Number of buys
26
Number of sells
-30
Price
$16.01

Significant Holders of Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) as of Q4 2021

95 filings reported holding SPRO - Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share as of Q4 2021.
Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) has 79 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC). These institutions hold a total of 19.8M shares of 55.7M outstanding shares and own 35.47% of the company stock.
Largest 10 shareholders include Aquilo Capital Management, LLC (4.96M shares), BlackRock Inc. (1.8M shares), BVF INC/IL (1.59M shares), Atlas Venture Associates IX, LLC (1.38M shares), VANGUARD GROUP INC (1.35M shares), Atlas Venture Life Science Advisors, LLC (1.03M shares), Rock Springs Capital Management LP (945K shares), Alphabet Inc. (890K shares), STATE STREET CORP (844K shares), and Artal Group S.A. (500K shares).
This table shows the top 79 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.