Type / Class
Equity / Common Stock, par value $0.001 per share
Shares outstanding
55,705,828
Total 13F shares
11,311,502
Share change
+217,023
Total reported value
$21,264,964
Price per share
$1.88
Number of holders
47
Value change
-$925,483
Number of buys
25
Number of sells
17

Institutional Holders of Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) as of Q3 2025

As of 30 Sep 2025, Spero Therapeutics, Inc. - Common Stock, par value $0.001 per share (SPRO) was held by 47 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 11,311,502 shares. The largest 10 holders included Pfizer Inc, VANGUARD GROUP INC, Anson Funds Management LP, RENAISSANCE TECHNOLOGIES LLC, Alphabet Inc., GEODE CAPITAL MANAGEMENT, LLC, BlackRock, Inc., Informed Momentum Co LLC, Ionic Capital Management LLC, and STATE STREET CORP. This page lists 47 institutional shareholders reporting positions in this security for the Q3 2025 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.