Spero Therapeutics, Inc.
Hedge Funds Holdings

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Spero Therapeutics, Inc.‘s stocks are currently a part of 27 hedge funds’ portfolios, which represents 13.56% of the total amount of its stocks outstanding. This makes up a total of 5.09M shares of Spero Therapeutics, Inc.. Compared to the previous quarter, the number fell by -64.16% or -9.12M shares fewer. As for the holding position changes, 33.33% (9) of current hedge fund investors increased the number of shares held, 11.11% (3) of current holders sold a part of the shares held, and 25.93% (7) closed the holdings completely. 1 hedge funds are new holders of Spero Therapeutics, Inc. stock in Q1 2023, it is 3.7% of total holders.

Hedge funds holding Spero Therapeutics (Q2 2018 – Q1 2023)

Number of hedge funds
Q2 2018 44
Q3 2018 51
Q4 2018 50
Q1 2019 53
Q2 2019 59
Q3 2019 58
Q4 2019 60
Q1 2020 59
Q2 2020 78
Q3 2020 75
Q4 2020 86
Q1 2021 90
Q2 2021 86
Q3 2021 86
Q4 2021 82
Q1 2022 96
Q2 2022 64
Q3 2022 60
Q4 2022 55
Q1 2023 27

Hedge funds changes in Spero Therapeutics positions (Q2 2018 – Q1 2023)

Changes in positions
Q2 2018 1313738
Q3 2018 1324563
Q4 2018 101613110
Q1 2019 10151675
Q2 2019 92410313
Q3 2019 6271276
Q4 2019 8281167
Q1 2020 7301570
Q2 2020 2734128-3
Q3 2020 11302114-1
Q4 2020 24332314-8
Q1 2021 142726815
Q2 2021 152821193
Q3 2021 62226626
Q4 2021 925201315
Q1 2022 2515221024
Q2 2022 14191844-31
Q3 2022 15101919-3
Q4 2022 17101522-9
Q1 2023 19377

Hedge funds changes in Spero Therapeutics stock options (Q2 2018 – Q1 2023)

Changes in stock options
Q2 2018 0 0
Q3 2018 0 0
Q4 2018 0 0
Q1 2019 1,000 1,000
Q2 2019 0 1,000
Q3 2019 0 1,000
Q4 2019 0 0
Q1 2020 0 0
Q2 2020 19,000 0
Q3 2020 217,000 614,000
Q4 2020 1,500,000 2,039,000
Q1 2021 889,000 1,579,000
Q2 2021 1,309,000 711,000
Q3 2021 2,005,000 1,210,000
Q4 2021 1,096,000 711,000
Q1 2022 219,000 15,000
Q2 2022 36,000 34,000
Q3 2022 241,000 919,000
Q4 2022 381,977 226,093
Q1 2023 9,590,000 145,000,000

Top 50 hedge fund holders of Spero Therapeutics, Inc. (NASDAQ:SPRO)

Hedge fund Value Shares owned Portfolio share
AQUILO CAPITAL MANAGEMENT, LLC 6.80M 3.40M 2.453%
AWM INVESTMENT COMPANY, INC. 4.60M 2.30M 0.700%
BVF INC/IL 3.85M 1.92M 0.159%
ANSON FUNDS MANAGEMENT LP 2.94M 1.47M 0.348%
ATLAS VENTURE ASSOCIATES IX, LLC 2.75M 1.37M 8.163%
VANGUARD GROUP INC 2.10M 1.05M 0.000%
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC 2.06M 1.03M 0.228%
ALPHABET INC. 1.78M 889.97K 0.091%
ROCK SPRINGS CAPITAL MANAGEMENT LP 1.54M 770.71K 0.040%
MURCHINSON LTD. 1.52M 762.7K 0.442%
BLACKROCK INC. Larry Fink 1.38M 692.13K 0.000%
MILLENNIUM MANAGEMENT LLC Israel Englander 1.37M 688.39K 0.001%
ARTAL GROUP S.A. 1M 500K 0.043%
NOVO HOLDINGS A/S 938K 468.90K 0.045%
GEODE CAPITAL MANAGEMENT, LLC 580K 290.25K 0.000%
OASIS MANAGEMENT CO LTD. 576K 288K 0.097%
OUP MANAGEMENT CO., LLC 498K 249.07K 0.775%
RENAISSANCE TECHNOLOGIES LLC Jim Simons 429K 214.7K 0.001%
BANK OF MONTREAL /CAN/ 415K 202.3K 0.000%
BANK OF MONTREAL /CAN/ 415K 202.3K 0.000%
MARSHALL WACE, LLP Paul Marshall 374K 186.57K 0.001%
AQR CAPITAL MANAGEMENT LLC Cliff Asness 373K 186.68K 0.001%
GROUP ONE TRADING, L.P. 251K 125.5K 0.001%
DAFNA CAPITAL MANAGEMENT LLC 250K 125K 0.067%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 248K 123.9K 0.000%
STATE STREET CORP 183K 91.31K 0.000%
LETKO, BROSSEAU & ASSOCIATES INC 147K 73.65K 0.003%
NORTHERN TRUST CORP 140K 69.96K 0.000%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 139K 69.28K 0.000%
ACADIAN ASSET MANAGEMENT LLC 121K 61.15K 0.001%
GOLDMAN SACHS GROUP INC 111K 55.43K 0.000%
GROUP ONE TRADING, L.P. 110K 55.1K 0.000%
SIMPLEX TRADING, LLC 102K 51.2K 0.000%
GROUP ONE TRADING, L.P. 83K 41.7K 0.000%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 56K 27.8K 0.000%
ADVISOR GROUP HOLDINGS, INC. 50K 24.81K 0.000%
UBS GROUP AG 46K 22.90K 0.000%
BOURGEON CAPITAL MANAGEMENT LLC 41K 20.6K 0.011%
MORGAN STANLEY 38K 19.23K 0.000%
WILLIAMS JONES WEALTH MANAGEMENT, LLC. 38K 19K 0.001%
TOWER RESEARCH CAPITAL LLC (TRC) 37K 18.23K 0.001%
GOFEN & GLOSSBERG LLC /IL/ 35K 17.5K 0.001%
SQUAREPOINT OPS LLC 33K 16.42K 0.000%
QUBE RESEARCH & TECHNOLOGIES LTD 32K 15.94K 0.000%
JANE STREET GROUP, LLC 31K 15.49K 0.000%
WEITZEL FINANCIAL SERVICES, INC. 28.4K 14.2K 0.020%
STIFEL FINANCIAL CORP 25K 12.40K 0.000%
SENTINEL PENSION ADVISORS INC 24K 12K 0.008%
LMR PARTNERS LLP 23K 11.50K 0.000%
MAN GROUP PLC Ian Livingston 22K 11.18K 0.000%