Type / Class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
55,705,828
Total 13F shares
18,370,621
Share change
+880,477
Total reported value
$338,248,936
Put/Call ratio
85%
Price per share
$18.41
Number of holders
87
Value change
+$16,424,956
Number of buys
25
Number of sells
29

Institutional Holders of Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) as of Q3 2021

As of 30 Sep 2021, Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) was held by 87 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 18,370,621 shares. The largest 10 holders included Aquilo Capital Management, LLC, BVF INC/IL, BlackRock Inc., Atlas Venture Associates IX, LLC, VANGUARD GROUP INC, Rock Springs Capital Management LP, Alphabet Inc., STATE STREET CORP, GRANAHAN INVESTMENT MANAGEMENT INC/MA, and Artal Group S.A.. This page lists 87 institutional shareholders reporting positions in this security for the Q3 2021 filing period.
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.