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Spero Therapeutics

Name Holding Trade Value Shares
Change
Change in
Stake
ACM
1
Aquilo Capital Management
California
$14.7M +$5.85M +663,784 +58%
AVAI
2
Atlas Venture Associates IX
Massachusetts
$11.1M
AI
3
Alphabet Inc
California
$8.99M
NHAS
4
Novo Holdings A/S
Denmark
$7.52M
BlackRock
5
BlackRock
New York
$7.12M +$1.11M +125,966 +17%
Vanguard Group
6
Vanguard Group
Pennsylvania
$5.08M +$1.17M +132,187 +27%
RSCM
7
Rock Springs Capital Management
Maryland
$4.89M +$705K +80,000 +15%
AG
8
Artal Group
Luxembourg
$4.65M +$670K +76,000 +15%
BI
9
BVF Inc
California
$4.55M -$2.49M -282,012 -33%
VA
10
VR Adviser
New York
$3.83M +$4.18M +474,015 New
AIC
11
AWM Investment Company
New York
$3.2M -$691K -78,395 -17%
Renaissance Technologies
12
Renaissance Technologies
New York
$2.62M -$123K -13,900 -4%
State Street
13
State Street
Massachusetts
$2.25M +$616K +69,852 +33%
Dimensional Fund Advisors
14
Dimensional Fund Advisors
Texas
$1.61M +$382K +43,381 +28%
GIM
15
Granahan Investment Management
Massachusetts
$1.39M +$199K +22,567 +15%
Northern Trust
16
Northern Trust
Illinois
$1.32M +$240K +27,277 +20%
Geode Capital Management
17
Geode Capital Management
Massachusetts
$1.25M +$315K +35,772 +30%
Fidelity Investments
18
Fidelity Investments
Massachusetts
$800K
JP Morgan Chase
19
JP Morgan Chase
New York
$631K -$486K -55,172 -41%
Jacobs Levy Equity Management
20
Jacobs Levy Equity Management
New Jersey
$583K +$232K +26,342 +57%
BCM
21
Bridgeway Capital Management
Texas
$560K -$11.2K -1,274 -2%
DCM
22
DAFNA Capital Management
California
$389K +$424K +48,103 New
Bank of New York Mellon
23
Bank of New York Mellon
New York
$371K +$73.1K +8,290 +22%
Nuveen
24
Nuveen
North Carolina
$356K +$49.9K +5,656 +15%
Stifel Financial
25
Stifel Financial
Missouri
$355K +$123K +13,969 +47%