Stocks · Health care · Pharmaceutical Preparations

Spero Therapeutics, Inc.

SPRO Clue Score50
United States Fiscal year ends December CIK 0001701108 Results filed 12 Aug 2026

What the insiders did Net buying

Insider
Date
Role
Action
Shares
Price
Amount
Esther Rajavelu
4 May 2026
See Remarks
Sell
25,240
$2.51
$63.35K
Timothy Keutzer
6 Feb 2026
Chief Operating Officer
Sell
18,652
$2.36
$44.02K
Esther Rajavelu
6 Feb 2026
See Remarks
Sell
50,816
$2.36
$119.93K
Esther Rajavelu
6 Feb 2026
See Remarks
Sell
37,101
$2.36
$87.56K
Timothy Keutzer
4 Feb 2026
Chief Operating Officer
Sell
3,471
$2.24
$7.78K
Timothy Keutzer
3 Feb 2026
Chief Operating Officer
Sell
24,224
$2.14
$51.84K
Esther Rajavelu
2 Feb 2026
See Remarks
Sell
18,442
$2.20
$40.57K
Timothy Keutzer
2 Feb 2026
Chief Operating Officer
Sell
18,891
$2.20
$41.56K
Esther Rajavelu
7 Nov 2025
See Remarks
Sell
40,270
$2.37
$95.44K
Timothy Keutzer
28 Aug 2025
Chief Operating Officer
Sell
1,695
$1.97
$3.34K
Ankit Mahadevia
28 Aug 2025
Director
Sell
6,572
$1.97
$12.95K
Ankit Mahadevia
5 Feb 2025
Director
Sell
55,260
$0.78
$43.10K
Ankit Mahadevia
5 Feb 2025
Director
Sell
13,959
$0.78
$10.89K
Sath Shukla
5 Feb 2025
CEO & President
Sell
106,408
$0.78
$83.00K
Sath Shukla
5 Feb 2025
CEO & President
Sell
42,786
$0.78
$33.37K
Sath Shukla
5 Feb 2025
CEO & President
Sell
6,139
$0.78
$4.79K
Esther Rajavelu
5 Feb 2025
CFO & Cbo
Sell
20,689
$0.78
$16.14K
Timothy Keutzer
5 Feb 2025
Chief Operating Officer
Sell
24,920
$0.78
$19.44K
Timothy Keutzer
5 Feb 2025
Chief Operating Officer
Sell
27,643
$0.78
$21.56K
Timothy Keutzer
5 Feb 2025
Chief Operating Officer
Sell
3,974
$0.78
$3.10K
Esther Rajavelu
8 Nov 2024
CFO & Cbo
Sell
17,245
$1.30
$22.42K
Esther Rajavelu
7 Nov 2024
CFO & Cbo
Sell
23,351
$1.31
$30.59K
Sath Shukla
27 Aug 2024
CEO & President
Sell
2,757
$1.35
$3.72K
Timothy Keutzer
27 Aug 2024
Chief Operating Officer
Sell
2,213
$1.35
$2.99K
Ankit Mahadevia
27 Aug 2024
Director
Sell
5,912
$1.35
$7.98K
Sath Shukla
5 Aug 2024
CEO and President
Sell
17,641
$1.31
$23.11K
Sath Shukla
2 Aug 2024
CEO and President
Sell
14,800
$1.32
$19.54K
Sath Shukla
5 Feb 2024
CEO and President
Sold on a plan
45,093
$1.45
$65.38K
Sath Shukla
2 Feb 2024
CEO and President
Sold on a plan
30,901
$1.37
$42.33K
Kamal Hamed
2 Feb 2024
Chief Medical Officer
Sell
28,075
$1.37
$38.46K
Tamara L Joseph
2 Feb 2024
Chief Legal Officer
Sell
30,906
$1.37
$42.34K
Ankit Mahadevia
2 Feb 2024
Director
Sell
63,795
$1.37
$87.40K
Timothy Keutzer
2 Feb 2024
Chief Operating Officer
Sell
30,971
$1.36
$42.12K
Kamal Hamed
13 Sep 2023
Chief Medical Officer
Sell
39,496
$1.27
$50.16K
Sath Shukla
29 Aug 2023
CEO and President
Sold on a plan
4,163
$1.30
$5.41K
Sath Shukla
28 Aug 2023
CEO and President
Sold on a plan
1,854
$1.26
$2.34K
Ankit Mahadevia
28 Aug 2023
Director
Sell
9,040
$1.26
$11.39K
Tamara L Joseph
28 Aug 2023
Chief Legal Officer
Sell
1,854
$1.26
$2.34K
Timothy Keutzer
28 Aug 2023
Chief Development Officer
Sell
1,854
$1.26
$2.34K
Ankit Mahadevia
3 Feb 2023
CEO and President
Sell
12,286
$1.81
$22.24K
Sath Shukla
2 Feb 2023
Chief Financial Officer
Sell
9,504
$1.83
$17.37K
Tamara L Joseph
2 Feb 2023
Chief Legal Officer
Sell
3,394
$1.86
$6.31K
Timothy Keutzer
2 Feb 2023
Chief Operating Officer
Sell
3,394
$1.86
$6.31K
Aquilo Capital Management, LLC
22 Sep 2022
10% owner
Sell indirect
566,284
$2.25
$1.27M
Aquilo Capital Management, LLC
22 Sep 2022
10% owner
Sell indirect
1,335,512
$2.25
$3.01M
Sath Shukla
29 Aug 2022
Chief Financial Officer
Sell
6,017
$0.89
$5.38K
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
Ankit Mahadevia
27 Dec 2021
CEO and President
Sold after exercise
8,000
$14.58
$116.67K
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
Aquilo Capital Management, LLC
8 Feb 2021
10% owner
Sell indirect
3,000
$21.74
$65.22K
Aquilo Capital Management, LLC
4 Feb 2021
10% owner
Sell indirect
34,144
$18.99
$648.25K
Aquilo Capital Management, LLC
3 Feb 2021
10% owner
Sell indirect
29,354
$18.98
$557.10K
Aquilo Capital Management, LLC
2 Feb 2021
10% owner
Sell indirect
22,841
$18.99
$433.77K
Aquilo Capital Management, LLC
1 Feb 2021
10% owner
Sell indirect
13,661
$19.24
$262.86K
Aquilo Capital Management, LLC
17 Dec 2020
10% owner
Sell indirect
250,000
$18.81
$4.70M
Cristina Larkin
16 Dec 2020
Chief Operating Officer
Sold after exercise
12,000
$19.00
$228.00K
Aquilo Capital Management, LLC
16 Dec 2020
10% owner
Sell indirect
14,933
$18.62
$278.03K
Aquilo Capital Management, LLC
9 Nov 2020
10% owner
Sell indirect
125,900
$13.77
$1.73M
Aquilo Capital Management, LLC
6 Nov 2020
10% owner
Sell indirect
5,000
$13.77
$68.87K
Aquilo Capital Management, LLC
5 Nov 2020
10% owner
Sell indirect
96,600
$13.98
$1.35M
Ankit Mahadevia
4 Nov 2020
CEO and President
Sold after exercise
7,370
$14.43
$106.34K
Aquilo Capital Management, LLC
4 Nov 2020
10% owner
Sell indirect
72,500
$14.26
$1.03M
Ankit Mahadevia
3 Nov 2020
CEO and President
Sold after exercise
2,137
$14.27
$30.49K
Ankit Mahadevia
23 Oct 2020
CEO and President
Sold after exercise
20
$14.25
$285.00
Ankit Mahadevia
14 Oct 2020
CEO and President
Sold after exercise
105
$14.25
$1.50K
Ankit Mahadevia
13 Oct 2020
CEO and President
Sold after exercise
14,367
$14.28
$205.21K
Ankit Mahadevia
8 Sep 2020
CEO and President
Sold after exercise
774
$14.25
$11.03K
Ankit Mahadevia
9 Jul 2020
CEO and President
Sold after exercise
2,293
$14.31
$32.81K
Ankit Mahadevia
7 Jul 2020
CEO and President
Sold after exercise
754
$14.25
$10.74K
Ankit Mahadevia
25 Jun 2020
CEO and President
Sold after exercise
2,642
$14.25
$37.65K
Ankit Mahadevia
24 Jun 2020
CEO and President
Sold after exercise
3,880
$14.28
$55.42K
Ankit Mahadevia
23 Jun 2020
CEO and President
Sold after exercise
8,045
$14.33
$115.26K
Ankit Mahadevia
22 Jun 2020
CEO and President
Sold after exercise
2,613
$14.30
$37.36K
GSK plc
17 Jul 2018
10% owner
Buy indirect
80,000
$12.50
$1.00M
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
200
$17.92
$3.58K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
200
$17.90
$3.58K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
100
$17.71
$1.77K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
100
$17.62
$1.76K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
400
$17.58
$7.03K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
100
$17.55
$1.75K
Ankit Mahadevia
6 Jul 2018
See Remarks
Sold after exercise
500
$17.50
$8.75K
Ankit Mahadevia
5 Jul 2018
See Remarks
Sold after exercise
3,076
$17.62
$54.20K
Joel Sendek
5 Jul 2018
Chief Financial Officer
Sold after exercise
2,000
$17.50
$35.00K
Cristina Larkin
5 Jul 2018
Chief Operating Officer
Sold after exercise
4,000
$17.50
$70.00K
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

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