United States Biotechnology & Medical Research

Aldeyra Therapeutics Inc (ALDX)

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Aldeyra Therapeutics Inc. experienced notable insider trading activity recently, with CEO Todd C. Brady acquiring shares valued at $836,900 over two transactions. This buying follows a period where the stock price declined 8.4% over ninety days. The company's last earnings report indicated a significant miss on earnings per share expectations.
Ticker: ALDX Exchange: NAS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Aldeyra Therapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Buy 3 Jun 2026
Value US$77,463.82 | Price 64.64 | Shares 60,662 (+19.0%)
Buy 3 Jun 2026
Value US$3,114,534.16 | Price 285.15 | Shares 71,629 (-0.6%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-05 2026-06-03 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
60,662 +19.0%
64.64
US$77,464 		60,662 +19.0% 64.64 US$77,464
2026-06-05 2026-06-03 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
71,629 -0.6%
285.15
US$3,114,534 		71,629 -0.6% 285.15 US$3,114,534
2026-03-20 2026-03-19 B Purchase
3.6
DOUGLAS RICHARD
Non-Executive Director
26,501 +39.7%
197.23
US$559,269 		26,501 +39.7% 197.23 US$559,269
2026-03-19 2026-03-18 B Purchase
2.8
Alfieri Michael

Principal Financial Officer

Officer
5,000 +200.0%
1.42
US$7,100 		5,000 +200.0% 1.42 US$7,100
2025-08-15 2025-08-13 B Purchase
2.8
Alfieri Michael

Principal Financial Officer

Officer
2,500 +inf%
5.30
US$13,250 		2,500 +inf% 5.30 US$13,250
2025-08-12 2025-08-12 PrS Proposed sale
1.5
Machatha Stephen

Officer

Officer
22,074
5.26
US$116,109 		22,074 5.26 US$116,109
2025-08-13 2025-08-11 PlS Planned sale
1.5
Machatha Stephen

Chief Development Officer

Officer
22,073 -9.1%
5.15
US$113,713 		22,073 -9.1% 5.15 US$113,713
2025-04-07 2025-04-03 S Sale
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
3,400,000 -36.7%
1.42
US$4,828,000 		3,400,000 -36.7% 1.42 US$4,828,000
2024-08-14 2024-08-12 PlS Planned sale
1.2
Greenberg Bruce

See Remarks

Officer
10,834 -7.9%
4.74
US$51,313 		10,834 -7.9% 4.74 US$51,313
2024-08-14 2024-08-12 S Sale
1.5
Machatha Stephen

Chief Development Officer

Officer
16,041 -6.3%
4.74
US$75,975 		16,041 -6.3% 4.74 US$75,975
2024-08-12 2024-08-12 PrS Proposed sale
1.2
Greenberg Bruce

Officer

Officer
10,834
5.10
US$55,253 		10,834 5.10 US$55,253
2024-08-12 2024-08-12 PrS Proposed sale
1.5
Machatha Stephen

Officer

Officer
16,041
5.10
US$81,809 		16,041 5.10 US$81,809
2024-04-08 2024-04-05 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
37,712 +0.4%
4.74
US$178,755 		37,712 +0.4% 4.74 US$178,755
2024-04-08 2024-04-04 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
140,281 +1.5%
4.67
US$655,112 		140,281 +1.5% 4.67 US$655,112
2024-04-03 2024-04-03 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
309,847 +3.5%
4.09
US$1,267,274 		309,847 +3.5% 4.09 US$1,267,274
2024-04-03 2024-04-02 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
186,051 +2.2%
3.44
US$640,015 		186,051 +2.2% 3.44 US$640,015
2024-04-03 2024-04-01 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
8,374 +0.1%
3.25
US$27,216 		8,374 +0.1% 3.25 US$27,216
2024-03-12 2024-03-12 PrS Proposed sale
1.5
STEPHEN G. MACHATHA

Officer

Officer
11,537
3.16
US$36,502 		11,537 3.16 US$36,502
2024-03-12 2024-03-12 S Sale
1.5
Machatha Stephen

Chief Development Officer

Officer
11,537 -4.5%
3.16
US$36,503 		11,537 -4.5% 3.16 US$36,503
2024-03-12 2024-03-12 S Sale
1.8
Brady Todd C

President and CEO

Executive Director
85,324 -5.5%
3.05
US$260,238 		85,324 -5.5% 3.05 US$260,238
2024-03-12 2024-03-11 S Sale
1.5
Machatha Stephen

Chief Development Officer

Officer
18,231 -6.7%
3.41
US$62,102 		18,231 -6.7% 3.41 US$62,102
2024-03-12 2024-03-11 S Sale
1.8
Brady Todd C

President and CEO

Executive Director
97,914 -5.9%
3.27
US$320,521 		97,914 -5.9% 3.27 US$320,521
2024-03-12 2024-03-11 S Sale
1.2
Greenberg Bruce

See Remarks

Officer
13,201 -9.9%
3.41
US$44,968 		13,201 -9.9% 3.41 US$44,968
2024-03-11 2024-03-11 PrS Proposed sale
1.8
Brady Todd C

Officer

Officer
183,238
3.25
US$595,524 		183,238 3.25 US$595,524
2024-03-11 2024-03-11 PrS Proposed sale
1.2
Greenberg Bruce

Officer

Officer
13,201
3.62
US$47,788 		13,201 3.62 US$47,788
2024-03-11 2024-03-11 PrS Proposed sale
1.5
Machatha Stephen

Officer

Officer
18,231
3.62
US$65,996 		18,231 3.62 US$65,996
2023-10-18 2023-10-18 S Sale
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
306,499 -3.4%
1.74
US$533,308 		306,499 -3.4% 1.74 US$533,308
2023-10-18 2023-10-16 S Sale
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
2,450,000 -21.6%
1.60
US$3,920,000 		2,450,000 -21.6% 1.60 US$3,920,000
2024-10-21 2023-04-12 B Purchase
1.5
Miller-Rich Nancy
Non-Executive Director
509 +123.2%
10.13
US$5,156 		509 +123.2% 10.13 US$5,156
2022-08-11 2022-08-10 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
15,000 +0.1%
7.85
US$117,750 		15,000 +0.1% 7.85 US$117,750
2022-08-11 2022-08-09 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
100,000 +0.9%
7.50
US$750,000 		100,000 +0.9% 7.50 US$750,000
2022-08-10 2022-08-08 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
97,000 +0.9%
7.24
US$702,280 		97,000 +0.9% 7.24 US$702,280
2022-08-09 2022-08-05 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
141,000 +1.3%
6.95
US$979,950 		141,000 +1.3% 6.95 US$979,950
2022-08-08 2022-08-04 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
95,100 +0.9%
6.17
US$586,767 		95,100 +0.9% 6.17 US$586,767
2022-08-05 2022-08-03 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
100,000 +0.9%
5.84
US$584,000 		100,000 +0.9% 5.84 US$584,000
2022-08-04 2022-08-02 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
412,406 +4.0%
5.59
US$2,305,350 		412,406 +4.0% 5.59 US$2,305,350
2022-08-03 2022-08-01 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
144,185 +1.4%
5.05
US$728,134 		144,185 +1.4% 5.05 US$728,134
2022-08-02 2022-07-29 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
222,123 +2.2%
5.03
US$1,117,279 		222,123 +2.2% 5.03 US$1,117,279
2022-08-01 2022-07-28 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
119,392 +1.2%
5.00
US$596,960 		119,392 +1.2% 5.00 US$596,960
2022-06-27 2022-06-23 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
17,700 +1.5%
3.36
US$59,546 		17,700 +1.5% 3.36 US$59,546
2022-06-27 2022-06-23 B Purchase
3.5
JOYCE MARTIN JOSEPH
Non-Executive Director
4,323 +22.0%
3.48
US$15,025 		4,323 +22.0% 3.48 US$15,025
2024-10-21 2021-05-03 B Purchase
1.5
Miller-Rich Nancy
Non-Executive Director
413 +inf%
12.81
US$5,291 		413 +inf% 12.81 US$5,291
2021-05-04 2021-05-03 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
1,200,000 +13.8%
12.50
US$15,000,000 		1,200,000 +13.8% 12.50 US$15,000,000
2021-01-21 2021-01-19 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
1,368,421 +18.7%
9.50
US$13,000,000 		1,368,421 +18.7% 9.50 US$13,000,000
2021-01-11 2021-01-08 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
50,000 +0.7%
7.60
US$380,000 		50,000 +0.7% 7.60 US$380,000
2021-01-11 2021-01-08 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
152,668 +2.1%
10.21
US$1,558,740 		152,668 +2.1% 10.21 US$1,558,740
2021-01-11 2021-01-08 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
347,332 +5.1%
9.21
US$3,198,928 		347,332 +5.1% 9.21 US$3,198,928
2021-01-11 2021-01-07 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
500,000 +8.0%
8.13
US$4,065,000 		500,000 +8.0% 8.13 US$4,065,000
2020-07-13 2020-07-09 B Purchase
2.7
PERCEPTIVE ADVISORS LLC
Large shareholder
3,200,000 +103.7%
4.25
US$13,600,000 		3,200,000 +103.7% 4.25 US$13,600,000
2020-03-17 2020-03-16 B Purchase
3.6
DOUGLAS RICHARD
Non-Executive Director
40,000 +47.1%
2.75
US$110,000 		40,000 +47.1% 2.75 US$110,000
2019-12-18 2019-12-16 B Purchase Brady Todd C

President and CEO

Executive Director
20,000 +3.2%
5.10
US$101,908 		20,000 +3.2% 5.10 US$101,908
2019-10-02 2019-09-30 PP Planned purchase
1.8
Brady Todd C

President and CEO

Executive Director
8,710 +1.4%
5.68
US$49,483 		8,710 +1.4% 5.68 US$49,483
2019-09-25 2019-09-23 PP Planned purchase
1.8
Brady Todd C

President and CEO

Executive Director
8,680 +1.4%
5.81
US$50,433 		8,680 +1.4% 5.81 US$50,433
2019-09-20 2019-09-18 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
14,288 +2.4%
5.91
US$84,465 		14,288 +2.4% 5.91 US$84,465
2019-09-19 2019-09-17 B Purchase
2.0
Bronstein Ben
1,700 +10.0%
5.85
US$9,945 		1,700 +10.0% 5.85 US$9,945
2019-09-17 2019-09-16 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
3,000 +0.5%
6.03
US$18,090 		3,000 +0.5% 6.03 US$18,090
2019-09-17 2019-09-13 B Purchase
3.6
DOUGLAS RICHARD
5,000 +6.2%
6.00
US$30,000 		5,000 +6.2% 6.00 US$30,000
2019-09-17 2019-09-13 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
10,000 +1.7%
5.79
US$57,900 		10,000 +1.7% 5.79 US$57,900
2019-09-16 2019-09-12 B Purchase
3.5
JOYCE MARTIN JOSEPH
1,700 +9.5%
5.86
US$9,964 		1,700 +9.5% 5.86 US$9,964
2019-09-13 2019-09-12 B Purchase
3.6
DOUGLAS RICHARD
10,000 +14.3%
6.03
US$60,276 		10,000 +14.3% 6.03 US$60,276
2019-09-13 2019-09-11 B Purchase
3.6
DOUGLAS RICHARD
10,000 +16.7%
5.75
US$57,529 		10,000 +16.7% 5.75 US$57,529
2019-09-11 2019-09-10 B Purchase
1.8
Brady Todd C

President and CEO

Executive Director
10,000 +1.8%
5.39
US$53,937 		10,000 +1.8% 5.39 US$53,937
2019-09-11 2019-09-10 B Purchase
3.6
DOUGLAS RICHARD
10,000 +20.0%
5.09
US$50,857 		10,000 +20.0% 5.09 US$50,857
2019-09-11 2019-09-09 PP Planned purchase
1.8
Brady Todd C

President and CEO

Executive Director
10,000 +1.8%
4.89
US$48,887 		10,000 +1.8% 4.89 US$48,887
2019-09-11 2019-09-09 B Purchase
3.6
DOUGLAS RICHARD
10,000 +25.0%
4.91
US$49,106 		10,000 +25.0% 4.91 US$49,106
2019-09-10 2019-09-06 PP Planned purchase
Clark David J

Chief Medical Officer
5,000 +38.8%
5.06
US$25,311 		5,000 +38.8% 5.06 US$25,311
2019-09-09 2019-09-05 PP Planned purchase
Reed Joshua

Chief Financial Officer
3,200 +9.8%
4.71
US$15,072 		3,200 +9.8% 4.71 US$15,072
2019-09-09 2019-09-05 PP Planned purchase
McMullin David

Chief Commerical Officer
4,329 +238.0%
4.68
US$20,260 		4,329 +238.0% 4.68 US$20,260
2019-03-28 2019-03-26 S Sale
1.2
TREU JESSE I
Non-Executive Director
445 -4.8%
10.01
US$4,454 		445 -4.8% 10.01 US$4,454
2019-03-28 2019-03-26 S Sale
1.2
TREU JESSE I
Non-Executive Director
96,298 -4.9%
10.01
US$963,943 		96,298 -4.9% 10.01 US$963,943
2017-09-21 2017-09-19 B Purchase PERCEPTIVE ADVISORS LLC Large shareholder
200,000 +6.9%
7.25
US$1,450,000 		200,000 +6.9% 7.25 US$1,450,000
2017-07-05 2017-06-30 B Purchase PERCEPTIVE ADVISORS LLC Large shareholder
296,007 +11.4%
4.60
US$1,361,632 		296,007 +11.4% 4.60 US$1,361,632
2017-02-21 2017-02-17 B Purchase Tulipano Stephen J

Chief Financial Officer
3,333 +inf%
4.50
US$14,998 		3,333 +inf% 4.50 US$14,998
2017-02-21 2017-02-17 B Purchase JOYCE MARTIN JOSEPH
4,444 +32.9%
4.50
US$19,998 		4,444 +32.9% 4.50 US$19,998
2017-02-21 2017-02-17 B Purchase Bronstein Ben
4,444 +35.6%
4.50
US$19,998 		4,444 +35.6% 4.50 US$19,998
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