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Amylyx Pharmaceuticals, Inc.

AMLX Net selling
CIK 0001658551 #1444 in the set updated 17 Sep 2026
Bought (120 mo)
$50.25M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$91.58M
$933.36K on a plan · $6.49M straight out of an exercise
Sold at will
$84.15M
117 of 132 sales
Net
−$41.33M
−$33.90M against sales at will

By person

16 insiders · 161 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Morningside Venture Investments Ltd entity
10% owner
$5.00M (1)
$22.54M (17)
−$17.54M
4,997,302
4.48%
$165.65M
Klee Justin B.
Co-Chief Executive Officer
$7.82M (20)
−$7.82M
3,613,056
3.24%
$119.77M
+46.1%
Cohen Joshua B
Co-Chief Executive Officer
$7.82M (20)
−$7.82M
3,613,123
3.24%
$119.77M
+46.1%
Yeramian Patrick D
Chief Medical Officer
$3.72M (8) scheduled
−$3.72M
205,605
0.1845%
$6.82M
−8.0%
FRATES JAMES M
Chief Financial Officer
$101.37K (1)
$2.83M (15)
−$2.73M
284,697
0.2555%
$9.44M
VIKING GLOBAL INVESTORS LP entity
10% owner
$43.70M (1)
$41.72M (16)
+$1.98M
1,850,940
1.66%
$61.36M
Mazzariello Gina
Chief Legal Officer
$1.87M (20) scheduled
−$1.87M
190,838
0.1713%
$6.33M
ALS Invest 1 B.V.
10% owner
$1.25M (4)
−$1.25M
5,895,280
5.29%
$195.42M
Bedrosian Camille L
Chief Medical Officer
$798.66K (8)
−$798.66K
278,064
0.2496%
$9.22M
MILNE GEORGE M JR
Director
$719.79K (2)
$1.12M (2)
−$396.29K
812,881
0.7295%
$26.95M
−6.6%
Firestone Karen
Director
$350.64K (5)
+$350.64K
116,900
0.1049%
$3.88M
Cheng Isaac
Director
$124.98K (1)
+$124.98K
10,422,228
9.35%
$345.48M
FONTEYNE PAUL R.
Director
$74.99K (1)
+$74.99K
3,947
0.0035%
$130.84K
Olinger Margaret
Chief Commercial Officer
$130.00K (1)
$87.23K (2)
+$42.77K
276,108
0.2478%
$9.15M
+56.2%
Zeiher Bernhardt G
Director
$37.01K (1)
+$37.01K
10,000
0.0090%
$331.49K
Quimi Daphne
Director
$9.44K (2)
+$9.44K
5,000
0.0045%
$165.74K
Insider
Date
Role
Action
Shares
Price
Amount
Cohen Joshua B
10 Sep 2026
Co-Chief Executive Officer
Sell
919
$33.15
$30.46K
Cohen Joshua B
10 Sep 2026
Co-Chief Executive Officer
Sell
29,545
$32.16
$950.04K
Klee Justin B.
10 Sep 2026
Co-Chief Executive Officer
Sell
1,439
$33.16
$47.71K
Klee Justin B.
10 Sep 2026
Co-Chief Executive Officer
Sell
29,025
$32.13
$932.55K
Mazzariello Gina
10 Sep 2026
Chief Legal Officer
Sell
11
$33.34
$366.74
Mazzariello Gina
10 Sep 2026
Chief Legal Officer
Sell
9,525
$32.46
$309.14K
FRATES JAMES M
10 Sep 2026
Chief Financial Officer
Sell
1,042
$33.23
$34.63K
FRATES JAMES M
10 Sep 2026
Chief Financial Officer
Sell
9,768
$32.27
$315.19K
Bedrosian Camille L
10 Sep 2026
Chief Medical Officer
Sell
2,081
$33.09
$68.86K
Bedrosian Camille L
10 Sep 2026
Chief Medical Officer
Sell
7,947
$32.21
$256.00K
Mazzariello Gina
2 Mar 2026
Chief Legal Officer
Sell
6,844
$14.52
$99.38K
FRATES JAMES M
2 Mar 2026
Chief Financial Officer
Sell
7,909
$14.52
$114.85K
Bedrosian Camille L
2 Mar 2026
Chief Medical Officer
Sell
6,461
$14.58
$94.21K
Cohen Joshua B
2 Mar 2026
Co-Chief Executive Officer
Sell
29,282
$14.48
$424.12K
Klee Justin B.
2 Mar 2026
Co-Chief Executive Officer
Sell
29,282
$14.47
$423.76K
Mazzariello Gina
23 Feb 2026
Chief Legal Officer
Sell
3,419
$14.14
$48.35K
Klee Justin B.
2 Feb 2026
Co-Chief Executive Officer
Sell
15,500
$14.69
$227.62K
Mazzariello Gina
2 Feb 2026
Chief Legal Officer
Sell
3,448
$14.65
$50.52K
Cohen Joshua B
2 Feb 2026
Co-Chief Executive Officer
Sell
15,500
$14.68
$227.59K
FRATES JAMES M
2 Feb 2026
Chief Financial Officer
Sell
3,557
$14.65
$52.10K
Klee Justin B.
6 Jan 2026
Co-Chief Executive Officer
Sell
7,715
$11.09
$85.59K
Cohen Joshua B
6 Jan 2026
Co-Chief Executive Officer
Sell
7,715
$11.09
$85.60K
FRATES JAMES M
6 Jan 2026
Chief Financial Officer
Sell
3,326
$11.11
$36.95K
Bedrosian Camille L
1 Dec 2025
Chief Medical Officer
Sell
6,580
$14.35
$94.42K
Bedrosian Camille L
30 Sep 2025
Chief Medical Officer
Sell
12,039
$14.58
$175.52K
Cohen Joshua B
30 Sep 2025
Co-Chief Executive Officer
Sell
200
$15.00
$3.00K
Cohen Joshua B
30 Sep 2025
Co-Chief Executive Officer
Sell
29,733
$14.34
$426.47K
FRATES JAMES M
30 Sep 2025
Chief Financial Officer
Sell
10,558
$14.65
$154.65K
Mazzariello Gina
30 Sep 2025
Chief Legal Officer
Sell
8,828
$14.58
$128.67K
Klee Justin B.
30 Sep 2025
Co-Chief Executive Officer
Sell
200
$15.01
$3.00K
Klee Justin B.
30 Sep 2025
Co-Chief Executive Officer
Sell
29,775
$14.37
$427.95K
Klee Justin B.
31 Mar 2025
Co-Chief Executive Officer
Sell
21,490
$3.46
$74.45K
Cohen Joshua B
31 Mar 2025
Co-Chief Executive Officer
Sell
21,490
$3.47
$74.48K
Mazzariello Gina
31 Mar 2025
Chief Legal Officer
Sell
9,192
$3.48
$31.95K
Bedrosian Camille L
31 Mar 2025
Chief Medical Officer
Sell
12,425
$3.47
$43.08K
FRATES JAMES M
31 Mar 2025
Chief Financial Officer
Sell
10,896
$3.47
$37.81K
Mazzariello Gina
3 Mar 2025
Chief Legal Officer
Sell
1,611
$3.12
$5.02K
Cohen Joshua B
3 Mar 2025
Co-Chief Executive Officer
Sell
4,595
$3.17
$14.55K
Klee Justin B.
3 Mar 2025
Co-Chief Executive Officer
Sell
4,595
$3.15
$14.48K
Mazzariello Gina
24 Feb 2025
Chief Legal Officer
Sell
4,169
$3.15
$13.14K
Klee Justin B.
3 Feb 2025
Co-Chief Executive Officer
Sell
11,855
$3.47
$41.10K
Cohen Joshua B
3 Feb 2025
Co-Chief Executive Officer
Sell
11,851
$3.47
$41.11K
Mazzariello Gina
3 Feb 2025
Chief Legal Officer
Sell
3,678
$3.49
$12.84K
Cohen Joshua B
6 Jan 2025
Co-Chief Executive Officer
Sell
7,471
$4.05
$30.23K
Klee Justin B.
6 Jan 2025
Co-Chief Executive Officer
Sell
7,471
$4.04
$30.20K
Bedrosian Camille L
2 Dec 2024
Chief Medical Officer
Sell
5,421
$5.54
$30.01K
Mazzariello Gina
30 Sep 2024
Chief Legal Officer
Sell
8,709
$3.20
$27.84K
Bedrosian Camille L
30 Sep 2024
Chief Medical Officer
Sell
11,442
$3.20
$36.56K
Cohen Joshua B
30 Sep 2024
Co-Chief Executive Officer
Sell
18,589
$3.20
$59.41K
Klee Justin B.
30 Sep 2024
Co-Chief Executive Officer
Sell
18,589
$3.20
$59.43K
Mazzariello Gina
5 Mar 2024
Chief Legal Officer
Sell
1,540
$18.73
$28.84K
FRATES JAMES M
5 Mar 2024
Chief Financial Officer
Sell
1,792
$18.73
$33.56K
Klee Justin B.
5 Mar 2024
Co-Chief Executive Officer
Sell
4,135
$18.73
$77.44K
Cohen Joshua B
5 Mar 2024
Co-Chief Executive Officer
Sell
4,135
$18.73
$77.44K
Mazzariello Gina
23 Feb 2024
Chief Legal Officer
Sell
2,838
$18.76
$53.23K
Yeramian Patrick D
9 Jan 2024
Chief Medical Officer
Sell
2,812
$16.33
$45.91K
Cohen Joshua B
9 Jan 2024
Co-Chief Executive Officer
Sell
5,841
$16.33
$95.37K
FRATES JAMES M
9 Jan 2024
Chief Financial Officer
Sell
2,716
$16.33
$44.35K
Klee Justin B.
9 Jan 2024
Co-Chief Executive Officer
Sell
5,841
$16.33
$95.37K
Morningside Venture Investments Ltd
29 Mar 2023
10% owner
Sell
29,048
$30.45
$884.51K
Morningside Venture Investments Ltd
28 Mar 2023
10% owner
Sell
100,000
$30.37
$3.04M
Morningside Venture Investments Ltd
27 Mar 2023
10% owner
Sell
28,000
$30.80
$862.40K
Morningside Venture Investments Ltd
27 Mar 2023
10% owner
Sell
32,964
$30.25
$997.16K
Morningside Venture Investments Ltd
21 Mar 2023
10% owner
Sell
28,807
$32.17
$926.72K
Morningside Venture Investments Ltd
21 Mar 2023
10% owner
Sell
34,641
$31.69
$1.10M
Morningside Venture Investments Ltd
16 Mar 2023
10% owner
Sell
9,122
$32.55
$296.92K
FRATES JAMES M
16 Mar 2023
Chief Financial Officer
Sell
1,704
$32.46
$55.32K
FRATES JAMES M
16 Mar 2023
Chief Financial Officer
Sell
30,796
$31.86
$981.14K
Cohen Joshua B
16 Mar 2023
Co-Chief Executive Officer
Sell
3,924
$32.45
$127.31K
Cohen Joshua B
16 Mar 2023
Co-Chief Executive Officer
Sell
96,076
$31.84
$3.06M
Yeramian Patrick D
16 Mar 2023
Chief Medical Officer
Sell
2,416
$32.43
$78.36K
Yeramian Patrick D
16 Mar 2023
Chief Medical Officer
Sell
52,211
$31.85
$1.66M
MILNE GEORGE M JR
16 Mar 2023
Director
Sell
1,916
$32.45
$62.17K
MILNE GEORGE M JR
16 Mar 2023
Director
Sell
33,084
$31.86
$1.05M
Klee Justin B.
16 Mar 2023
Co-Chief Executive Officer
Sell
3,445
$32.48
$111.88K
Klee Justin B.
16 Mar 2023
Co-Chief Executive Officer
Sell
96,555
$31.84
$3.07M
Morningside Venture Investments Ltd
15 Mar 2023
10% owner
Sell
41,066
$33.68
$1.38M
Morningside Venture Investments Ltd
15 Mar 2023
10% owner
Sell
108,934
$33.12
$3.61M
Morningside Venture Investments Ltd
14 Mar 2023
10% owner
Sell
70,714
$34.54
$2.44M
Morningside Venture Investments Ltd
2 Mar 2023
10% owner
Sell
50,000
$33.75
$1.69M
Mazzariello Gina
24 Feb 2023
Chief Legal Officer
Sell
3,586
$34.49
$123.67K
Morningside Venture Investments Ltd
23 Feb 2023
10% owner
Sell
1,111
$36.24
$40.26K
Morningside Venture Investments Ltd
23 Feb 2023
10% owner
Sell
48,889
$35.55
$1.74M
Morningside Venture Investments Ltd
22 Feb 2023
10% owner
Sell
10,084
$36.34
$366.45K
Morningside Venture Investments Ltd
22 Feb 2023
10% owner
Sell
39,916
$35.91
$1.43M
Morningside Venture Investments Ltd
22 Feb 2023
10% owner
Sell
2,112
$35.34
$74.64K
Morningside Venture Investments Ltd
22 Feb 2023
10% owner
Sell
47,888
$34.70
$1.66M
Klee Justin B.
6 Jan 2023
Co-Chief Executive Officer
Sell
1,846
$36.79
$67.91K
Klee Justin B.
6 Jan 2023
Co-Chief Executive Officer
Sell
4,122
$36.08
$148.72K
Olinger Margaret
6 Jan 2023
Chief Commercial Officer
Sell
743
$36.79
$27.33K
Olinger Margaret
6 Jan 2023
Chief Commercial Officer
Sell
1,660
$36.08
$59.89K
FRATES JAMES M
6 Jan 2023
Chief Financial Officer
Sell
822
$36.79
$30.24K
FRATES JAMES M
6 Jan 2023
Chief Financial Officer
Sell
1,836
$36.08
$66.24K
Cohen Joshua B
6 Jan 2023
Co-Chief Executive Officer
Sell
1,846
$36.79
$67.91K
Cohen Joshua B
6 Jan 2023
Co-Chief Executive Officer
Sell
4,122
$36.08
$148.72K
Yeramian Patrick D
6 Jan 2023
Chief Medical Officer
Sell
629
$36.79
$23.14K
Yeramian Patrick D
6 Jan 2023
Chief Medical Officer
Sell
1,405
$36.08
$50.69K
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
3,142
$31.44
$98.79K
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
73,886
$30.90
$2.28M
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
147,502
$29.87
$4.41M
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
6,654
$31.44
$209.22K
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
156,463
$30.90
$4.83M
VIKING GLOBAL INVESTORS LP
9 Sep 2022
10% owner
Sell indirect
312,353
$29.87
$9.33M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
52,466
$32.23
$1.69M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
7,554
$30.59
$231.06K
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
75,096
$29.14
$2.19M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
51,298
$28.16
$1.44M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
38,116
$27.28
$1.04M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
111,102
$32.23
$3.58M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
15,996
$30.59
$489.28K
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
159,026
$29.14
$4.63M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
108,631
$28.16
$3.06M
VIKING GLOBAL INVESTORS LP
8 Sep 2022
10% owner
Sell indirect
80,715
$27.28
$2.20M
ALS Invest 1 B.V.
6 Jul 2022
10% owner
Sell
2,307
$22.42
$51.72K
ALS Invest 1 B.V.
6 Jul 2022
10% owner
Sell
29,595
$21.32
$630.97K
ALS Invest 1 B.V.
6 Jul 2022
10% owner
Sell
10,395
$20.60
$214.14K
ALS Invest 1 B.V.
6 Jul 2022
10% owner
Sell
18,312
$19.54
$357.82K

What was left out

Form 4 filings counted 177
Amendments (4/A) skipped 5
Filings about a different issuer 0
Unreadable filings 0
Joint filings 2
Sales on a Rule 10b5-1 plan 6
Sales straight out of an exercise 9
Sales at will 117
Transactions with no price 0
Shares from compensation/vesting 38,287,796
Sales filed before the plan box existed 42
History held since 10 Jan 2022