SEC Insider Transactions from Klee Justin B..

Last updated: 2026-03-14 11:56 UTC | Total transactions: 36

Klee Justin B., Co-Chief Executive Officer of Amylyx Pharmaceuticals ($AMLX), sold shares on the open market eight times over the last year, totaling $3.1 million. His most recent sale occurred on March 2, 2026. These sales rank 2,646th among 11,678 individual insiders in our database, where the average is $8.6 million across about 6.4 transactions. He made no open market purchases in this period.

Set Up your own filters →
Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 5, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Common Stock 248865 $0.00 3,583,481.0000 109,819,569 7.46% 0.23%
March 5, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Stock Option (Right to Buy) 373295 $0.00 373,295.0000 109,819,569 9999.99% 0.34%
March 2, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 29282 $14.47 3,334,616.0000 109,819,569 0.87% 0.03%
Feb. 2, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 15500 $14.69 3,363,898.0000 109,819,569 0.46% 0.01%
Jan. 16, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Common Stock 2847 $7.57 3,381,393.0000 109,819,569 0.08% 0.00%
Jan. 15, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 136193 $13.58 3,378,546.0000 109,819,569 3.87% 0.12%
Jan. 15, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Common Stock 197153 $7.57 3,514,739.0000 109,819,569 5.94% 0.18%
Jan. 16, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Stock Option (Right to Buy) 2847 $0.00 0.0000 109,819,569 100.00% 0.00%
Jan. 15, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Stock Option (Right to Buy) 197153 $0.00 2,847.0000 109,819,569 98.58% 0.18%
Jan. 16, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 1995 $13.89 3,379,398.0000 109,819,569 0.06% 0.00%
Jan. 6, 2026 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 7715 $11.09 3,317,586.0000 109,819,569 0.23% 0.01%
Sept. 30, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 200 $15.01 3,325,301.0000 88,602,468 0.01% 0.00%
Sept. 30, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 29775 $14.37 3,325,501.0000 88,602,468 0.89% 0.03%
March 31, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 21490 $3.46 3,355,276.0000 88,602,468 0.64% 0.02%
March 6, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Common Stock 180118 $0.00 3,376,766.0000 88,602,468 5.63% 0.20%
March 6, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Stock Option (right to buy) 270177 $0.00 270,177.0000 88,602,468 9999.99% 0.30%
March 3, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 4595 $3.15 3,196,648.0000 88,602,468 0.14% 0.01%
Feb. 5, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Stock Option (right to buy) 36310 $0.00 0.0000 0 100.00% 0.00%
Feb. 5, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Common Stock 36310 $1.57 3,201,243.0000 0 1.15% 0.00%
Feb. 3, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 11855 $3.47 3,164,933.0000 0 0.37% 0.00%
Jan. 6, 2025 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 7471 $4.04 3,176,788.0000 0 0.23% 0.00%
Nov. 4, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Stock Option (right to buy) 63690 $0.00 36,310.0000 0 63.69% 0.00%
Nov. 4, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer M Common Stock 63690 $1.57 3,184,259.0000 0 2.04% 0.00%
Sept. 30, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 18589 $3.20 3,120,569.0000 0 0.59% 0.00%
April 16, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Stock Option (right to buy) 380000 $0.00 380,000.0000 0 9999.99% 0.00%
April 16, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Common Stock 179850 $0.00 3,139,158.0000 0 6.08% 0.00%
March 5, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 4135 $18.73 2,959,308.0000 0 0.14% 0.00%
Feb. 26, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Stock Option (right to buy) 190000 $0.00 190,000.0000 0 9999.99% 0.00%
Feb. 26, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Common Stock 126667 $0.00 2,963,443.0000 0 4.47% 0.00%
Jan. 9, 2024 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 5841 $16.33 2,836,776.0000 0 0.21% 0.00%
March 16, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 96555 $31.84 2,796,062.0000 0 3.34% 0.00%
March 16, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 3445 $32.48 2,792,617.0000 0 0.12% 0.00%
March 16, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Stock Option (right to buy) 225000 $0.00 225,000.0000 0 9999.99% 0.00%
March 16, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer A Common Stock 50000 $0.00 2,842,617.0000 0 1.79% 0.00%
Jan. 6, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 1846 $36.79 2,892,617.0000 0 0.06% 0.00%
Jan. 6, 2023 Amylyx Pharmaceuticals, Inc. $AMLX Klee Justin B. Co-Chief Executive Officer S Common Stock 4122 $36.08 2,894,463.0000 0 0.14% 0.00%