SEI Investments’s Aldeyra Therapeutics ALDX Stock Holding History

SEI Investments’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	$44.2K	Buy	+20,739	New	+$35.6K	﹤0.01%	3239
2026 Q1	–	Sell	-33,287	Closed	-$172K	–	3235
2025 Q4	$172K	Sell	33,287 -6,072	-15%	-$31.2K	﹤0.01%	2934
2025 Q3	$205K	Buy	+39,359	New	+$205K	﹤0.01%	2605
2021 Q3	–	Sell	-69,498	Closed	-$787K	–	2546
2021 Q2	$787K	Buy	+69,498	New	+$836K	﹤0.01%	1907
2019 Q1	–	Sell	-64,540	Closed	-$536K	–	2891
2018 Q4	$536K	Buy	+64,540	New	+$661K	﹤0.01%	1729
2017 Q3	–	Sell	-1,800	Closed	-$8K	–	3187
2017 Q2	$8K	Buy	+1,800	New	+$8.28K	﹤0.01%	2626

Other funds holding ALDX

KCM

Knoll Capital Management Miami, Florida $214M AUM 62.74% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

KCM

Kingdon Capital Management New York $976M AUM 66.76% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return

6CM

683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return

Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Qube Research & Technologies (QRT) London, United Kingdom $108B AUM 37.29% 1-Year Est. Return

SEI Investments's ALDX Position: Q2 2026 in Review

SEI Investments opened a new position in Aldeyra Therapeutics (ALDX) in Q2 2026: 20,739 shares worth $44.2K. The stake represents ﹤0.01% of the portfolio and ranks #3239 among its holdings. This is a return to the name: SEI Investments previously reported a position in ALDX as recently as Q4 2025.

SEI Investments first reported a position in ALDX in Q2 2017 and has held it in 6 quarters since. The position peaked at $787K in Q2 2021. 107 funds tracked by Wall St. Rank hold ALDX as of Q2 2026.

SEI Investments held 20,739 shares of Aldeyra Therapeutics worth $44.2K as of Q2 2026.
Aldeyra Therapeutics was a new SEI Investments position in Q2 2026.
Aldeyra Therapeutics made up ﹤0.01% of SEI Investments's portfolio in Q2 2026, its #3239 holding.
SEI Investments first reported a position in Aldeyra Therapeutics in Q2 2017 and has held it in 6 quarters since.
SEI Investments's Aldeyra Therapeutics position peaked at $787K in Q2 2021.
107 funds tracked by Wall St. Rank held Aldeyra Therapeutics as of Q2 2026.

Based on SEI Investments's 13F filing for Q2 2026, filed 14 Aug 2026.