ALDX

Aldeyra Therapeutics, Inc.$1.83+0.01 (+0.82%)

Prev Close$1.83·MCap$316.1M·P/E—·Vol9.28M·Yield—

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Buys (12M)

$118.3K

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Sells (12M)

$113.7K

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Net Activity

Net Buyer

$4.6K

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Aldeyra Therapeutics, Inc. (ALDX) has been mixed between buying and selling, with 3 insider purchases totaling $118.3K and 1 insider sale totaling $113.7K. The most recent insider transaction was by DOUGLAS RICHARD (director), who purchased $98.0K worth of shares on Mar 20, 2026. Aldeyra Therapeutics, Inc. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $316.1M.

ALDX Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Mar 20, 2026	DOUGLAS RICHARD	director	Buy	70,000	$1.40	$98.0K	195,000
Mar 19, 2026	Alfieri Michael	officer: Principal Financial Officer	Buy	5,000	$1.42	$7.1K	7,500
Aug 13, 2025	Alfieri Michael	Principal Financial Officer	Buy	2,500	$5.30	$13.3K	0
Aug 11, 2025	Machatha Stephen	Chief Development Officer	Sell	22,073	$5.15	$113.7K	0
Aug 12, 2024	Greenberg Bruce	See Remarks	Sell	10,834	$4.74	$51.3K	0
Aug 12, 2024	Machatha Stephen	Chief Development Officer	Sell	16,041	$4.74	$76.0K	0
Mar 9, 2024	Brady Todd C	President and CEO	Sell	183,238	$3.17	$580.8K	0
Mar 9, 2024	Greenberg Bruce	See Remarks	Sell	13,201	$3.41	$45.0K	0
Mar 9, 2024	Machatha Stephen	Chief Development Officer	Sell	29,768	$3.31	$98.6K	0
Sep 7, 2023	Brady Todd C	President and CEO	Sell	73,807	$7.22	$532.9K	0
Jun 23, 2022	Brady Todd C	President and CEO	Buy	17,700	$3.36	$59.5K	0
Jun 23, 2022	JOYCE MARTIN JOSEPH	Director	Buy	4,323	$3.48	$15.0K	0
May 3, 2021	Miller-Rich Nancy	Director	Buy	922	$11.33	$10.4K	0

ALDX Insider Buying Activity

The following table shows recent insider purchases of Aldeyra Therapeutics, Inc. (ALDX) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Mar 20, 2026	DOUGLAS RICHARD	director	Buy	70,000	$1.40	$98.0K	195,000
Mar 19, 2026	Alfieri Michael	officer: Principal Financial Officer	Buy	5,000	$1.42	$7.1K	7,500
Aug 13, 2025	Alfieri Michael	Principal Financial Officer	Buy	2,500	$5.30	$13.3K	0
Jun 23, 2022	Brady Todd C	President and CEO	Buy	17,700	$3.36	$59.5K	0
Jun 23, 2022	JOYCE MARTIN JOSEPH	Director	Buy	4,323	$3.48	$15.0K	0
May 3, 2021	Miller-Rich Nancy	Director	Buy	922	$11.33	$10.4K	0

ALDX Insider Selling Activity

The following table shows recent insider sales of Aldeyra Therapeutics, Inc. (ALDX) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value
Aug 11, 2025	Machatha Stephen	Chief Development Officer	Sell	22,073	$5.15	$113.7K
Aug 12, 2024	Greenberg Bruce	See Remarks	Sell	10,834	$4.74	$51.3K
Aug 12, 2024	Machatha Stephen	Chief Development Officer	Sell	16,041	$4.74	$76.0K
Mar 9, 2024	Brady Todd C	President and CEO	Sell	183,238	$3.17	$580.8K
Mar 9, 2024	Greenberg Bruce	See Remarks	Sell	13,201	$3.41	$45.0K
Mar 9, 2024	Machatha Stephen	Chief Development Officer	Sell	29,768	$3.31	$98.6K
Sep 7, 2023	Brady Todd C	President and CEO	Sell	73,807	$7.22	$532.9K