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Spero Therapeutics

Name Holding Trade Value Shares
Change
Change in
Stake
AFM
1
Anson Funds Management
Texas
$4.85M +$544K +325,254 +11%
Vanguard Group
2
Vanguard Group
Pennsylvania
$2.07M +$623K +372,183 +35%
AVAI
3
Atlas Venture Associates IX
Massachusetts
$2M
AIC
4
AWM Investment Company
New York
$1.89M
AVLSA
5
Atlas Venture Life Science Advisors
Massachusetts
$1.5M
AI
6
Alphabet Inc
California
$1.29M
M
7
Murchinson
Ontario, Canada
$1.11M +$71.8K +42,921 +6%
RSCM
8
Rock Springs Capital Management
Maryland
$971K
Millennium Management
9
Millennium Management
New York
$717K -$639K -381,857 -44%
BlackRock
10
BlackRock
New York
$710K +$2.9K +1,730 +0.4%
NHAS
11
Novo Holdings A/S
Denmark
$680K
Renaissance Technologies
12
Renaissance Technologies
New York
$595K +$113K +67,400 +20%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$490K +$135K +80,572 +31%
OMC
14
OUP Management Company
Pennsylvania
$361K
DCM
15
DAFNA Capital Management
California
$181K
XT
16
XTX Topco
Cayman Islands
$174K -$380K -226,873 -65%
State Street
17
State Street
Massachusetts
$161K
BCM
18
Bridgeway Capital Management
Texas
$159K +$184K +109,800 New
Group One Trading
19
Group One Trading
Illinois
$126K +$136K +81,363 +1,417%
Northern Trust
20
Northern Trust
Illinois
$125K +$27.9K +16,672 +24%
Marshall Wace
21
Marshall Wace
United Kingdom
$93.4K +$22.6K +13,471 +26%
UBS Group
22
UBS Group
Switzerland
$60.2K -$6.96K -4,159 -9%
Two Sigma Investments
23
Two Sigma Investments
New York
$46.5K -$12.9K -7,695 -19%
Charles Schwab
24
Charles Schwab
California
$41.4K
Susquehanna International Group
25
Susquehanna International Group
Pennsylvania
$38.5K -$40.4K -24,105 -48%