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Company profile

Aldeyra Therapeutics, Inc. Insider Trading

ALDX

Every SEC Form 4 insider trading filing for Aldeyra Therapeutics, Inc. (ALDX) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?

Exchange
Nasdaq
Sector
Pharmaceutical Preparations
CIK
0001341235
Filings
50
Insiders
15
Last filing
2026-06-09
SEC EDGAR ↗Yahoo Finance ↗Finviz ↗Stock Analysis ↗

Activity summary

No insider transactions in the last 30 days. The most recent was on June 9, 2026, when William D Clark bought 70,000 shares. 50 filings from 15 insiders are on record below.

Three year balance

Buy and sell value by quarter, Q3 23 to Q2 26. Aldeyra Therapeutics, Inc. insiders are net sellers across the period shown.

PurchasesSales
Q3 23Q4 23Q1 24Q2 24Q3 24Q4 24Q1 25$4.8MQ2 25Q3 25Q4 25Q1 26Q2 26

Bars below the rule are sales, above are purchases. Largest quarter on the chart is $4.8M.

No insider activity recorded for ALDX in the last 90 days.

Insider Transactions

Sourced from SEC EDGAR Form 4 filings. Updated hourly.

DateInsiderCompanyTypeSharesPriceValueReturn
Jun 9, 2026William D ClarkALDX
Award
70,000——-21.6% 3m
Jun 9, 2026William D ClarkALDX
Award
2,323——-21.6% 3m
Jun 9, 2026Neal WalkerALDX
Award
70,000——-21.6% 3m
Jun 9, 2026Neal WalkerALDX
Award
3,318——-21.6% 3m
Jun 9, 2026Ben BronsteinALDX
Award
70,000——-21.6% 3m

45 more transactions hidden

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Top insiders

By total value filed.

PERCEPTIVE ADVISORS LLC1 filing−$4.8M
Todd C BradyPresident and CEO1 filing+$418K
Stephen MachathaChief Development Officer2 filings−$190K
Richard DouglasDirector1 filing+$98K
Bruce GreenbergSee Remarks1 filing−$51K

Institutional Ownership

Top 13F-HR holders of Aldeyra Therapeutics, Inc. as of 2026-06-30

↓ decreasing
Total reported AUM
$7.5M
QoQ change
-87.6%
Reporting period
2026-06-30
#1
Ardsley Advisory Partners Lp
CIK 0000900529
$2.1M
975K shares
#2
BlackRock, Inc.
CIK 0002012383
$1.8M
841K shares
#3
Ardsley Advisory Partners Lp
CIK 0000900529
$639,000
300K shares

Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →

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Form4API, StockholmNot affiliated with the SEC or EDGAR. Data sourced from public EDGAR filings. Not investment advice.

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