Aldeyra Therapeutics, Inc.

ALDXNASDAQHealthcare● Active

$1.74

+$0.11(+6.75%)

Market Cap$104958658

P/E Ratio—

52W High$6.175

52W Low$1.07

Avg Volume3.1M

Open$1.90

Beta1.19

Insider Trades Ownership Employees

Aldeyra Therapeutics, Inc. (ALDX) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · ALDX · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

2.00

Buy/Sell (by trades)

Overall sentiment

BULLISH

↑ Buy 67%Active transactions only · RSU vesting excluded33% Sell ↓

Aldeyra Therapeutics, Inc. insiders have been net buyers of shares over the past 12 Months, which may signal confidence in the company's outlook.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

ALDX insider buying and selling by quarter

ALDX insider selling · ALDX insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

3.4M1.7M0

2024 Q1

2024 Q2

2024 Q3

2025 Q1

2025 Q2

2025 Q3

2026 Q1

2026 Q2

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · ALDX ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

ALDX executive sell shares · ALDX board member insider trading · ALDX insider trading SEC filing

Showing 34 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Jun 3, 2026	Brady Todd C President and CEO · Director	Purchase	250,000	$1.67	$418K	1,721,298	Form 4
Mar 19, 2026	DOUGLAS RICHARD Director	Purchase	70,000	$1.40	$98K	195,000	Form 4
Mar 18, 2026	Alfieri Michael Principal Financial Officer	Purchase	5,000	$1.42	$7K	7,500	Form 4
Aug 13, 2025	Alfieri Michael Principal Financial Officer	Purchase	2,500	$5.30	$13K	2,500	Form 4
Aug 11, 2025	Machatha Stephen Chief Development Officer	Sale	22,073	$5.15	$114K	221,799	Form 4
Apr 3, 2025	PERCEPTIVE ADVISORS LLC 10 percent owner	Sale	3,400,000	$1.42	$4.83M⚡	5,875,851	Form 4
Apr 12, 2023	Miller-Rich Nancy Director	Purchase	509	$10.13	$5K	922	Form 4
May 3, 2021	Miller-Rich Nancy Director	Purchase	413	$12.81	$5K	413	Form 4
Aug 12, 2024	Machatha Stephen Chief Development Officer	Sale	16,041	$4.74	$76K	236,771	Form 4
Aug 12, 2024	Greenberg Bruce See Remarks	Sale	10,834	$4.74	$51K	126,382	Form 4
Apr 5, 2024	PERCEPTIVE ADVISORS LLC 10 percent owner	Purchase	37,712	$4.74	$179K	9,275,851	Form 4
Apr 4, 2024	PERCEPTIVE ADVISORS LLC 10 percent owner	Purchase	140,281	$4.67	$655K	9,238,139	Form 4
Apr 3, 2024	PERCEPTIVE ADVISORS LLC 10 percent owner	Purchase	309,847	$4.09	$1.27M⚡	9,097,858	Form 4
Apr 2, 2024	PERCEPTIVE ADVISORS LLC 10 percent owner	Purchase	186,051	$3.44	$640K	8,788,011	Form 4
Apr 1, 2024	PERCEPTIVE ADVISORS LLC 10 percent owner	Purchase	8,374	$3.25	$27K	8,601,960	Form 4
Mar 11, 2024	Greenberg Bruce See Remarks	Sale	13,201	$3.41	$45K	120,699	Form 4
Mar 11, 2024	Machatha Stephen Chief Development Officer	Sale	18,231	$3.41	$62K	255,032	Form 4
Mar 12, 2024	Machatha Stephen Chief Development Officer	Sale	11,537	$3.16	$37K	243,495	Form 4
Mar 11, 2024	Brady Todd C President and CEO · Director	Sale	97,914	$3.27	$321K	1,556,622	Form 4
Mar 12, 2024	Brady Todd C President and CEO · Director	Sale	85,324	$3.05	$260K	1,471,298	Form 4
Oct 16, 2023	PERCEPTIVE ADVISORS LLC 10 percent owner	Sale	2,450,000	$1.60	$3.92M⚡	8,900,085	Form 4
Oct 18, 2023	PERCEPTIVE ADVISORS LLC 10 percent owner	Sale	306,499	$1.74	$533K	8,593,586	Form 4
Sep 7, 2023	Brady Todd C President and CEO · Director	Option	48,021	$0.55	$27K	1,728,343	Form 4
Sep 7, 2023	Brady Todd C President and CEO · Director	Option	32,953	$0.55	$18K	1,680,322	Form 4
Sep 7, 2023	Brady Todd C President and CEO · Director	Other	73,807	$7.22	$533K	1,654,536	Form 4

Brady Todd C

President and CEO · Director

Purchase

Date

Jun 3

250,000

Price

$1.67

Value

$418K

View Form 4 on SEC.gov

DOUGLAS RICHARD

Director

Purchase

Date

Mar 19

70,000

Price

$1.40

Value

$98K

View Form 4 on SEC.gov

Alfieri Michael

Principal Financial Officer

Purchase

Date

Mar 18

5,000

Price

$1.42

Value

$7K

View Form 4 on SEC.gov

Alfieri Michael

Principal Financial Officer

Purchase

Date

Aug 13

2,500

Price

$5.30

Value

$13K

View Form 4 on SEC.gov

Machatha Stephen

Chief Development Officer

Sale

Date

Aug 11

22,073

Price

$5.15

Value

$114K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Sale

Date

Apr 3

3,400,000

Price

$1.42

Value

$4.83M ⚡

View Form 4 on SEC.gov

Miller-Rich Nancy

Director

Purchase

Date

Apr 12

509

Price

$10.13

Value

$5K

View Form 4 on SEC.gov

Miller-Rich Nancy

Director

Purchase

Date

May 3

413

Price

$12.81

Value

$5K

View Form 4 on SEC.gov

Machatha Stephen

Chief Development Officer

Sale

Date

Aug 12

16,041

Price

$4.74

Value

$76K

View Form 4 on SEC.gov

Greenberg Bruce

See Remarks

Sale

Date

Aug 12

10,834

Price

$4.74

Value

$51K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Purchase

Date

Apr 5

37,712

Price

$4.74

Value

$179K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Purchase

Date

Apr 4

140,281

Price

$4.67

Value

$655K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Purchase

Date

Apr 3

309,847

Price

$4.09

Value

$1.27M ⚡

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Purchase

Date

Apr 2

186,051

Price

$3.44

Value

$640K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Purchase

Date

Apr 1

8,374

Price

$3.25

Value

$27K

View Form 4 on SEC.gov

Greenberg Bruce

See Remarks

Sale

Date

Mar 11

13,201

Price

$3.41

Value

$45K

View Form 4 on SEC.gov

Machatha Stephen

Chief Development Officer

Sale

Date

Mar 11

18,231

Price

$3.41

Value

$62K

View Form 4 on SEC.gov

Machatha Stephen

Chief Development Officer

Sale

Date

Mar 12

11,537

Price

$3.16

Value

$37K

View Form 4 on SEC.gov

Brady Todd C

President and CEO · Director

Sale

Date

Mar 11

97,914

Price

$3.27

Value

$321K

View Form 4 on SEC.gov

Brady Todd C

President and CEO · Director

Sale

Date

Mar 12

85,324

Price

$3.05

Value

$260K

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Sale

Date

Oct 16

2,450,000

Price

$1.60

Value

$3.92M ⚡

View Form 4 on SEC.gov

PERCEPTIVE ADVISORS LLC

10 percent owner

Sale

Date

Oct 18

306,499

Price

$1.74

Value

$533K

View Form 4 on SEC.gov

Brady Todd C

President and CEO · Director

Option

Date

Sep 7

48,021

Price

$0.55

Value

$27K

View Form 4 on SEC.gov

Brady Todd C

President and CEO · Director

Option

Date

Sep 7

32,953

Price

$0.55

Value

$18K

View Form 4 on SEC.gov

Brady Todd C

President and CEO · Director

Other

Date

Sep 7

73,807

Price

$7.22

Value

$533K

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 2

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About ALDX insider trading

ALDX insider trades

Aldeyra Therapeutics, Inc. (ALDX) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Alfieri Michael (Principal Financial Officer), Brady Todd C (President and CEO · Director), DOUGLAS RICHARD (Director). Over the past 12 months, 4 insiders have filed transactions with the SEC. ALDX insiders have been primarily buying, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Aldeyra Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

ALDX insider trading · 5 questions

The insiders of Aldeyra Therapeutics, Inc. (ALDX) include executives and directors such as Alfieri Michael (Principal Financial Officer), Brady Todd C (President and CEO · Director), DOUGLAS RICHARD (Director), among others. Over the past 12 months, 4 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

ALDX board member insider tradingwho are ALDX insidersALDX insider rosterAldeyra Therapeutics, Inc. executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026