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Spero Therapeutics

Name Holding Trade Value Shares
Change
Change in
Stake
AVAI
1
Atlas Venture Associates IX
Massachusetts
$16.2M +$16.9M +1,376,968 New
RCM
2
RA Capital Management
Massachusetts
$14.4M +$15M +1,225,647 New
AI
3
Alphabet Inc
California
$13.1M +$13.7M +1,112,473 New
BI
4
BVF Inc
California
$12.1M +$12.6M +1,029,185 New
Fidelity Investments
5
Fidelity Investments
Massachusetts
$9.4M +$9.82M +800,000 New
RSCM
6
Rock Springs Capital Management
Maryland
$6.17M +$6.44M +525,000 New
VMI
7
VHCP Management II
New York
$5.71M +$5.96M +485,615 New
AG
8
Artal Group
Luxembourg
$4.11M +$4.3M +350,000 New
AIC
9
AWM Investment Company
New York
$4.11M +$4.3M +350,000 New
BlackRock
10
BlackRock
New York
$2.83M +$2.96M +240,874 New
Northern Trust
11
Northern Trust
Illinois
$765K +$799K +65,125 New
Vanguard Group
12
Vanguard Group
Pennsylvania
$534K +$558K +45,489 New
ECM
13
Endurant Capital Management
California
$365K +$382K +31,100 New
California Public Employees Retirement System
14
California Public Employees Retirement System
California
$294K +$307K +25,000 New
LCM
15
Laurion Capital Management
New York
$170K +$178K +14,500 New
Deutsche Bank
16
Deutsche Bank
Germany
$155K +$163K +13,293 New
Morgan Stanley
17
Morgan Stanley
New York
$124K +$130K +10,553 New
DIM
18
DC Investments Management
Virginia
$118K +$123K +10,039 New
California State Teachers Retirement System (CalSTRS)
19
California State Teachers Retirement System (CalSTRS)
California
$112K +$117K +9,511 New
TCIM
20
TIAA CREF Investment Management
New York
$103K +$108K +8,806 New
TA
21
Teachers Advisors
New York
$81K +$85.1K +6,931 New
DCM
22
DAFNA Capital Management
California
$59K +$61.4K +5,000 New
AIG
23
American International Group
New York
$48K +$49.9K +4,063 New
TRCT
24
Tower Research Capital (TRC)
New York
$24K +$25.6K +2,089 New
SO
25
STRS Ohio
Ohio
$19K +$20.9K +1,700 New