Aldeyra Therapeutics Ownership | Who Owns Aldeyra Therapeutics?

Overview Forecast RevenueFinancials Chart

Aldeyra Therapeutics Ownership Summary

Aldeyra Therapeutics is owned by 57.07% institutional investors, 3.10% insiders, and 39.83% retail investors. Knoll capital management is the largest institutional shareholder, holding 9.12% of ALDX shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.95% of its assets in Aldeyra Therapeutics shares.

ALDX Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Aldeyra Therapeutics	57.07%	3.10%	39.83%
Sector	Healthcare Stocks	486.50%	11.08%	-397.59%
Industry	Biotech Stocks	304.14%	11.08%	-215.23%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Knoll capital management	5.48M	9.12%	$20.97M
Perceptive advisors	4.05M	6.75%	$15.52M
Blackrock funding, inc. /de	3.85M	6.42%	$14.75M
Vanguard group	3.76M	6.31%	$18.75M
Blackrock	3.62M	6.10%	$11.99M
Ardsley advisory partners lp	2.05M	3.41%	$7.85M
Kingdon capital management	1.33M	2.22%	$5.10M
Geode capital management	1.12M	1.88%	$5.59M
683 capital management	1.08M	1.80%	$4.14M
State street	1.03M	1.74%	$5.16M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Knoll capital management	5.48M	14.91%	$20.97M
Ardsley advisory partners lp	2.05M	1.03%	$7.85M
Kingdon capital management	1.33M	0.69%	$5.10M
Perceptive advisors	4.05M	0.58%	$15.52M
683 capital management	1.08M	0.27%	$4.14M
Alphacentric advisors	46.91K	0.23%	$234.10K
Palo alto investors lp	225.47K	0.18%	$863.53K
Adar1 capital management	249.92K	0.15%	$957.19K
Providence wealth advisors	25.00K	0.10%	$133.13K
Woodstock	266.76K	0.09%	$1.02M

Top Buyers

Holder	Shares	% Assets	Change
683 capital management	1.08M	0.27%	604.00K
Kingdon capital management	1.33M	0.69%	552.79K
Blackrock	3.62M	0.00%	311.16K
Ardsley advisory partners lp	2.05M	1.03%	300.00K
Pfg investments	257.30K	0.06%	205.55K

Top Sellers

Holder	Shares	% Assets	Change
Perceptive advisors	4.05M	0.58%	-5.22M
Invesco	29.91K	-	-626.60K
Federated hermes	-	-	-551.09K
Kennedy capital management	686.97K	0.06%	-546.45K
Raymond james financial	3.00K	-	-448.92K

New Positions

Holder	Shares	% Assets	Change	Value
Alphacentric advisors	46.91K	0.23%	46.91K	$234.10K
Cerity partners	36.58K	0.00%	36.58K	$140.09K
Ballast	31.62K	0.05%	31.62K	$121.12K
Boston financial mangement	28.25K	0.00%	28.25K	$140.96K
Mariner	22.41K	0.00%	22.41K	$85.84K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-9.00
Ifp advisors	-13.00
Capital performance advisors llp	-17.00
Parallel advisors	-30.00
Innealta capital	-46.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	123	5.13%	31,618,255	-13.84%	53	1.40%	62	3.33%	25	4.17%
Sep 30, 2024	117	9.35%	36,698,492	3.87%	61	1.74%	60	13.21%	24	-22.58%
Jun 30, 2024	105	-0.94%	35,151,111	-0.76%	59	1.64%	51	10.87%	31	-6.06%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.76M	2.95%	-
Vanguard Total Stock Mkt Idx Inv	1.74M	2.90%	-38.44K
iShares Russell 2000 ETF	1.31M	2.18%	-24.89K
Fidelity Small Cap Index	511.27K	0.85%	-4.81K
Vanguard Institutional Extnd Mkt Idx Tr	481.33K	0.80%	-219.33K
iShares Russell 2000 Value ETF	412.16K	0.69%	-
Invesco Dorsey Wright SmallCap Momt ETF	406.98K	0.68%	-
iShares Russell 2000 Growth ETF	402.73K	0.67%	-
Kennedy Micro Cap	342.52K	0.57%	-122.33K
Vanguard Explorer Inv	331.51K	0.55%	-261.35K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 13, 2025	Alfieri Michael	Principal Financial Officer	Buy	$13.25K
Aug 11, 2025	Machatha Stephen	Chief Development Officer	Sell	$113.71K
Apr 03, 2025	PERCEPTIVE ADVISORS LLC	-	Sell	$4.83M
May 03, 2021	Miller-Rich Nancy	-	Buy	$5.29K
Apr 12, 2023	Miller-Rich Nancy	-	Buy	$5.16K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	1	1
2025 Q2	-	1
2025 Q1	-	-
2024 Q3	-	2
2024 Q2	5	-

ALDX Ownership FAQ

Who Owns Aldeyra Therapeutics?

Aldeyra Therapeutics shareholders are primarily institutional investors at 57.07%, followed by 3.10% insiders and 39.83% retail investors. The average institutional ownership in Aldeyra Therapeutics's industry, Biotech Stocks , is 304.14%, which Aldeyra Therapeutics falls below.

Who owns the most shares of Aldeyra Therapeutics?

Aldeyra Therapeutics’s largest shareholders are Knoll capital management (5.48M shares, 9.12%), Perceptive advisors (4.05M shares, 6.75%), and Blackrock funding, inc. /de (3.85M shares, 6.42%). Together, they hold 22.28% 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 14.91% of its assets in 5.48M Aldeyra Therapeutics shares, valued at 20.97M$.

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

Vanguard US Total Market Shares ETF is the top mutual fund holder of Aldeyra Therapeutics shares, with 2.95% of its total shares outstanding invested in 1.76M Aldeyra Therapeutics shares.

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