Ardsley Advisory Partners’s Aldeyra Therapeutics ALDX Stock Holding History

Ardsley Advisory Partners’s Portfolio ALDX Stock Details ALDX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$2.08M	Buy	975,000 +25,000	+3%	+$43K	0.22%	103
2026 Q1	$1.61M	Sell	950,000 -500,000	-34%	-$2.19M	0.2%	104
2025 Q4	$7.51M	Sell	1,450,000 -450,000	-24%	-$2.31M	0.82%	40
2025 Q3	$9.92M	Sell	1,900,000 -150,000	-7%	-$782K	1.23%	27
2025 Q2	$7.85M	Buy	2,050,000 +300,000	+17%	+$776K	1.03%	28
2025 Q1	$9.89M	Buy	1,750,000 +600,000	+52%	+$3.55M	1.89%	9
2024 Q4	$5.74M	Buy	1,150,000 +650,000	+130%	+$3.34M	0.91%	43
2024 Q3	$2.69M	Buy	+500,000	New	+$2.38M	0.44%	68
2020 Q4	–	Sell	-62,100	Closed	-$460K	–	134
2020 Q3	$460K	Hold	62,100	–	–	0.09%	100
2020 Q2	$259K	Buy	62,100 +25,000	+67%	+$91.3K	0.06%	111
2020 Q1	$92K	Hold	37,100	–	–	0.04%	88
2019 Q4	$216K	Sell	37,100 -10,000	-21%	-$57.8K	0.03%	128
2019 Q3	$248K	Hold	47,100	–	–	0.06%	111
2019 Q2	$282K	Sell	47,100 -5,000	-10%	-$37.6K	0.04%	116
2019 Q1	$470K	Hold	52,100	–	–	0.09%	84
2018 Q4	$432K	Sell	52,100 -2,900	-5%	-$29.7K	0.11%	71
2018 Q3	$759K	Buy	55,000 +10,000	+22%	+$81.1K	0.1%	79
2018 Q2	$358K	Hold	45,000	–	–	0.05%	128
2018 Q1	$336K	Hold	45,000	–	–	0.05%	122
2017 Q4	$306K	Buy	45,000 +5,448	+14%	+$35.9K	0.04%	111
2017 Q3	$285K	Buy	39,552 +25,000	+172%	+$131K	0.04%	113
2017 Q2	$68K	Buy	+14,552	New	+$66.9K	0.01%	134

Other funds holding ALDX

Woodstock Corp Boston, Massachusetts $1.2B AUM 26.37% 1-Year Est. Return

Wealth Enhancement Advisory Services Plymouth, Minnesota $59.8B AUM 29.42% 1-Year Est. Return

YIH

Y-Intercept (HK) Hong Kong $5.05B AUM 17.89% 1-Year Est. Return

MFG

Merit Financial Group Alpharetta, Georgia $16.4B AUM 25.17% 1-Year Est. Return

AWM

Activest Wealth Management Aventure, Florida $518M AUM 44.34% 1-Year Est. Return

IWA

Inspirion Wealth Advisors Libertyville, Illinois $874M AUM 16.23% 1-Year Est. Return

FFA

Farther Finance Advisors San Francisco, California $12.8B AUM 26.53% 1-Year Est. Return

GAMMA Investing Foster City, California $2.69B AUM 42.78% 1-Year Est. Return

TWD

True Wealth Design Akron, Ohio $420M AUM 22.7% 1-Year Est. Return

Ardsley Advisory Partners's ALDX Position: Q2 2026 in Review

Ardsley Advisory Partners increased its Aldeyra Therapeutics (ALDX) stake by 2.6% in Q2 2026, buying an estimated $43K and bringing the position to 975,000 shares worth $2.08M. The position accounts for 0.22% of the portfolio, ranked #103.

Ardsley Advisory Partners first reported a position in ALDX in Q2 2017 and has held it in 22 quarters since. The position peaked at $9.92M in Q3 2025. 10 funds tracked by Wall St. Rank hold ALDX as of Q2 2026.

Ardsley Advisory Partners held 975,000 shares of Aldeyra Therapeutics worth $2.08M as of Q2 2026.
Ardsley Advisory Partners bought 25,000 Aldeyra Therapeutics shares in Q2 2026, an estimated $43K.
Aldeyra Therapeutics made up 0.22% of Ardsley Advisory Partners's portfolio in Q2 2026, its #103 holding.
Ardsley Advisory Partners first reported a position in Aldeyra Therapeutics in Q2 2017 and has held it in 22 quarters since.
Ardsley Advisory Partners's Aldeyra Therapeutics position peaked at $9.92M in Q3 2025.
10 funds tracked by Wall St. Rank held Aldeyra Therapeutics as of Q2 2026.

Based on Ardsley Advisory Partners's 13F filing for Q2 2026, filed 13 Jul 2026.