InsiderClue
Stocks · Health care · Pharmaceutical Preparations

Spero Therapeutics, Inc.

SPRO Clue Score50
United States Fiscal year ends December CIK 0001701108 Results filed 12 Aug 2026
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What the insiders did Net buying

Individual transactions

34
Insider
Date
Role
Action
Shares
Price
Amount
Aquilo Capital Management, LLC
26 Apr 2022
10% owner
Buy indirect
39,727
$5.24
$207.97K
Aquilo Capital Management, LLC
30 Mar 2022
10% owner
Buy indirect
16,885
$8.79
$148.39K
Aquilo Capital Management, LLC
30 Mar 2022
10% owner
Buy indirect
33,115
$8.79
$291.03K
Aquilo Capital Management, LLC
14 Mar 2022
10% owner
Buy indirect
8,006
$7.63
$61.05K
Aquilo Capital Management, LLC
14 Mar 2022
10% owner
Buy indirect
15,702
$7.63
$119.74K
Aquilo Capital Management, LLC
28 Feb 2022
10% owner
Buy indirect
15,104
$9.53
$143.93K
Aquilo Capital Management, LLC
28 Feb 2022
10% owner
Buy indirect
29,729
$9.53
$283.30K
Aquilo Capital Management, LLC
18 Feb 2022
10% owner
Buy indirect
14,828
$9.24
$137.04K
Aquilo Capital Management, LLC
31 Jan 2022
10% owner
Buy indirect
125,000
$11.59
$1.45M
Aquilo Capital Management, LLC
24 Jan 2022
10% owner
Buy indirect
1,599
$10.89
$17.42K
Aquilo Capital Management, LLC
18 Jan 2022
10% owner
Buy indirect
48,488
$12.41
$601.96K
Aquilo Capital Management, LLC
10 Jan 2022
10% owner
Buy indirect
8,867
$12.93
$114.61K
Aquilo Capital Management, LLC
31 Dec 2021
10% owner
Buy indirect
125,000
$15.75
$1.97M
Aquilo Capital Management, LLC
30 Dec 2021
10% owner
Buy indirect
50,000
$15.77
$788.61K
Aquilo Capital Management, LLC
29 Dec 2021
10% owner
Buy indirect
75,493
$14.64
$1.11M
Aquilo Capital Management, LLC
29 Oct 2021
10% owner
Buy indirect
150,000
$17.53
$2.63M
Aquilo Capital Management, LLC
30 Sep 2021
10% owner
Buy indirect
134,543
$18.65
$2.51M
Aquilo Capital Management, LLC
14 Sep 2021
10% owner
Buy indirect
2,156
$18.49
$39.87K
Aquilo Capital Management, LLC
13 Sep 2021
10% owner
Buy indirect
44,210
$18.56
$820.67K
Aquilo Capital Management, LLC
9 Sep 2021
10% owner
Buy indirect
24,749
$18.50
$457.79K
Aquilo Capital Management, LLC
31 Aug 2021
10% owner
Buy indirect
48,645
$18.93
$920.66K
Aquilo Capital Management, LLC
30 Aug 2021
10% owner
Buy indirect
44,042
$17.87
$786.86K
Aquilo Capital Management, LLC
27 Aug 2021
10% owner
Buy indirect
13,957
$16.88
$235.53K
Aquilo Capital Management, LLC
26 Aug 2021
10% owner
Buy indirect
22,982
$16.55
$380.32K
Aquilo Capital Management, LLC
24 Aug 2021
10% owner
Buy indirect
40,170
$16.28
$653.79K
Aquilo Capital Management, LLC
23 Aug 2021
10% owner
Buy indirect
137,835
$16.33
$2.25M
Aquilo Capital Management, LLC
20 Aug 2021
10% owner
Buy indirect
221,190
$14.86
$3.29M
GSK plc
17 Jul 2018
10% owner
Buy indirect
80,000
$12.50
$1.00M
Casper Breum
6 Nov 2017
Director
Buy indirect
214,285
$14.00
$3.00M
Cristina Larkin
6 Nov 2017
Chief Operating Officer
Buy
1,500
$14.00
$21.00K
Joel Sendek
6 Nov 2017
Chief Financial Officer
Buy
5,000
$14.00
$70.00K
Vikas Goyal
6 Nov 2017
Director
Buy indirect
428,571
$14.00
$6.00M
Jean Francois Formela
6 Nov 2017
Director
Buy indirect
428,571
$14.00
$6.00M
GSK plc
6 Nov 2017
10% owner
Buy indirect
428,571
$14.00
$6.00M
Show all 115 transactions →

What was left out

Form 4 filings counted 197
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 23
Sales on a Rule 10b5-1 plan 4
Sales straight out of an exercise 24
Sales at will 53
Transactions with no price 0
Shares from compensation/vesting 13,007,082
Sales filed before the plan box existed 18
History held since 7 Nov 2017