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Spero Therapeutics

Name Holding Trade Value Shares
Change
Change in
Stake
AFM
1
Anson Funds Management
Texas
$5.22M +$2.89M +1,545,736 +105%
AVAI
2
Atlas Venture Associates IX
Massachusetts
$2.38M
AIC
3
AWM Investment Company
New York
$2.25M -$1.87M -1,000,000 -43%
Vanguard Group
4
Vanguard Group
Pennsylvania
$1.82M +$1.24K +665 +0.1%
AVLSA
5
Atlas Venture Life Science Advisors
Massachusetts
$1.78M
AI
6
Alphabet Inc
California
$1.54M
Millennium Management
7
Millennium Management
New York
$1.52M +$351K +188,002 +27%
M
8
Murchinson
Ontario, Canada
$1.32M
RSCM
9
Rock Springs Capital Management
Maryland
$1.16M -$189K -101,177 -13%
BlackRock
10
BlackRock
New York
$844K -$381K -204,055 -29%
NHAS
11
Novo Holdings A/S
Denmark
$811K
XT
12
XTX Topco
Cayman Islands
$600K +$647K +346,734 New
Renaissance Technologies
13
Renaissance Technologies
New York
$593K +$239K +128,200 +60%
OMC
14
Oasis Management Company
Cayman Islands
$498K
Geode Capital Management
15
Geode Capital Management
Massachusetts
$445K -$61.6K -32,974 -11%
OMC
16
OUP Management Company
Pennsylvania
$431K
DCM
17
DAFNA Capital Management
California
$216K
State Street
18
State Street
Massachusetts
$192K +$36.2K +19,400 +21%
Northern Trust
19
Northern Trust
Illinois
$120K -$708 -379 -0.5%
Marshall Wace
20
Marshall Wace
United Kingdom
$88.1K -$253K -135,653 -73%
Susquehanna International Group
21
Susquehanna International Group
Pennsylvania
$87.6K -$34.8K -18,637 -27%
UBS Group
22
UBS Group
Switzerland
$79K +$42.5K +22,774 +99%
Two Sigma Investments
23
Two Sigma Investments
New York
$68.8K +$74.3K +39,795 New
VF
24
Virtu Financial
New York
$59K +$64.2K +34,369 New
TRCT
25
Tower Research Capital (TRC)
New York
$57K +$27.9K +14,925 +82%