Aldeyra Therapeutics Ownership | Who Owns Aldeyra Therapeutics?

Aldeyra Therapeutics Ownership Summary

Aldeyra Therapeutics is owned by 61.57% institutional investors, 3.18% insiders, and 35.24% retail investors. Knoll capital management is the largest institutional shareholder, holding 9.10% of ALDX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.96% of its assets in Aldeyra Therapeutics shares.

ALDX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Aldeyra Therapeutics	61.57%	3.18%	35.24%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.75%	11.83%	52.41%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Knoll capital management	5.48M	9.10%	$9.25M
Blackrock funding, inc. /de	3.76M	6.26%	$6.36M
Vanguard group	3.70M	6.15%	$19.16M
Blackrock	3.62M	6.10%	$11.99M
Aqr capital management	2.83M	4.70%	$4.78M
Kingdon capital management	2.15M	3.58%	$3.64M
683 capital management	1.50M	2.49%	$2.53M
D. e. shaw	1.40M	2.33%	$2.37M
Geode capital management	1.25M	2.08%	$2.12M
State street	1.12M	1.87%	$1.90M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Knoll capital management	5.48M	5.14%	$9.25M
Propel bio management	730.61K	0.78%	$1.23M
Kingdon capital management	2.15M	0.40%	$3.64M
Ardsley advisory partners lp	950.00K	0.20%	$1.61M
683 capital management	1.50M	0.13%	$2.53M
Alphacentric advisors	37.12K	0.06%	$62.73K
Palo alto investors lp	155.71K	0.04%	$263.15K
Woodstock	266.76K	0.04%	$450.82K
Quadrant capital group	185.00	0.04%	$48.97M
Providence wealth advisors	25.00K	0.03%	$43.31K

Top Buyers

Holder	Shares	% Assets	Change
Aqr capital management	2.83M	0.00%	1.60M
Millennium management	995.24K	0.00%	951.18K
Propel bio management	730.61K	0.78%	730.61K
Jane street group	968.89K	0.00%	665.04K
Renaissance	863.19K	0.00%	513.19K

Top Sellers

Holder	Shares	% Assets	Change
Perceptive advisors	-	-	-4.19M
Kennedy capital management	95.86K	0.00%	-1.16M
Ardsley advisory partners lp	950.00K	0.20%	-500.00K
Johnson & johnson	-	-	-299.67K
Deutsche bank ag\	50.27K	-	-267.06K

New Positions

Holder	Shares	% Assets	Change	Value
Propel bio management	730.61K	0.78%	730.61K	$1.23M
Vanguard fiduciary trust	338.62K	0.00%	338.62K	$572.27K
Hrt financial lp	286.44K	0.00%	286.44K	$484.00K
Flow traders u.s.	55.52K	0.00%	55.52K	$94.00K
Boston financial mangement	28.25K	0.00%	28.25K	$140.96K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-9.00
Capital performance advisors llp	-17.00
Parallel advisors	-30.00
Advisor group	-40.00
Innealta capital	-46.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	128	-10.49%	37,044,368	-4.84%	61	1.47%	70	16.67%	35	-33.96%
Dec 31, 2025	30	-78.26%	4,523,979	-88.49%	7	0.18%	10	-88.10%	13	-48.00%
Sep 30, 2025	46	-61.67%	5,222,346	-83.31%	8	0.32%	22	-63.93%	10	-70.59%
Jun 30, 2025	128	-4.48%	34,265,682	-9.56%	57	1.43%	66	26.92%	35	-25.53%
Mar 31, 2025	12	-90.32%	15,581,741	-57.99%	26	0.67%	5	-91.94%	3	-88.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	1.78M	2.96%	-
Vanguard US Total Market Shares ETF	1.76M	2.95%	-
iShares Russell 2000 ETF	1.32M	2.19%	11.14K
Kennedy Small Cap Select	692.53K	1.15%	57.43K
Fidelity Small Cap Index	533.67K	0.88%	7.00K
Vanguard Institutional Extnd Mkt Idx Tr	523.46K	0.87%	-
iShares Russell 2000 Value ETF	412.16K	0.69%	-
Invesco Dorsey Wright SmallCap Momt ETF	406.98K	0.68%	-
AZ Fd 1 - AZ Eq - Amer Opps A-EUR Acc	378.72K	0.63%	-13.46K
Russell 2000 Equity Index Fund B	363.45K	0.60%	-172.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 03, 2026	Brady Todd C	President and CEO	Buy	$418.45K
Mar 19, 2026	DOUGLAS RICHARD	-	Buy	$98.00K
Mar 18, 2026	Alfieri Michael	Principal Financial Officer	Buy	$7.10K
Aug 13, 2025	Alfieri Michael	Principal Financial Officer	Buy	$13.25K
Aug 11, 2025	Machatha Stephen	Chief Development Officer	Sell	$113.71K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	1	-
2026 Q1	2	-
2025 Q3	1	1
2025 Q2	-	1
2025 Q1	-	-

ALDX Ownership FAQ

Who Owns Aldeyra Therapeutics?

Aldeyra Therapeutics shareholders are primarily institutional investors at 61.57%, followed by 3.18% insiders and 35.25% retail investors. The average institutional ownership in Aldeyra Therapeutics's industry, Biotech Stocks , is 35.75%, which Aldeyra Therapeutics exceeds.

Who owns the most shares of Aldeyra Therapeutics?

Aldeyra Therapeutics’s largest shareholders are Knoll capital management (5.48M shares, 9.10%), Blackrock funding, inc. /de (3.76M shares, 6.26%), and Vanguard group (3.7M shares, 6.15%). Together, they hold 21.51% of Aldeyra Therapeutics’s total shares outstanding.

Does Blackrock own Aldeyra Therapeutics?

Yes, BlackRock owns 6.10% of Aldeyra Therapeutics, totaling 3.62M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 11.99M$. In the last quarter, BlackRock increased its holdings by 311.16K shares, a 9.40% change.

Who is Aldeyra Therapeutics’s biggest shareholder by percentage of total assets invested?

Knoll capital management is Aldeyra Therapeutics’s biggest shareholder by percentage of total assets invested, with 5.14% of its assets in 5.48M Aldeyra Therapeutics shares, valued at 9.25M$.

Who is the top mutual fund holder of Aldeyra Therapeutics shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Aldeyra Therapeutics shares, with 2.96% of its total shares outstanding invested in 1.78M Aldeyra Therapeutics shares.

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