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ALDX Insider Trading

Insider Ownership Percentage: 9.60%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $4,941,675.95

Aldeyra Therapeutics Insider Trading History Chart

This chart shows the insider buying and selling history at Aldeyra Therapeutics by year and by quarter.

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Aldeyra Therapeutics Share Price & Price History

Current Price: $4.88
Price Change: ▲ Price Increase of +0.01 (0.21%)
As of 12/4/2025 05:00 PM ET

This chart shows the closing price history over time for ALDX up to the past year.

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Days: 30 | 90 | 365

Aldeyra Therapeutics Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
8/11/2025Stephen MachathaInsiderSell22,073$5.15$113,675.95221,799View SEC Filing Icon  
4/3/2025Perceptive Advisors LlcMajor ShareholderSell3,400,000$1.42$4,828,000.005,875,851View SEC Filing Icon  
4/5/2024Perceptive Advisors LlcMajor ShareholderBuy37,712$4.74$178,754.889,275,851View SEC Filing Icon  
4/3/2024Perceptive Advisors LlcMajor ShareholderBuy309,847$4.09$1,267,274.239,097,858View SEC Filing Icon  
4/1/2024Perceptive Advisors LlcMajor ShareholderBuy8,374$3.25$27,215.508,601,960View SEC Filing Icon  
3/11/2024Bruce GreenbergInsiderSell13,201$3.41$45,015.41120,699View SEC Filing Icon  
3/11/2024Todd C. BradyCEOSell97,914$3.27$320,178.781,556,622View SEC Filing Icon  
10/18/2023Perceptive Advisors LlcMajor ShareholderSell306,499$1.74$533,308.268,593,586View SEC Filing Icon  
10/16/2023Perceptive Advisors LlcMajor ShareholderSell2,450,000$1.60$3,920,000.008,900,085View SEC Filing Icon  
4/12/2023Nancy Miller-RichDirectorBuy509$10.13$5,156.17922View SEC Filing Icon  
5/3/2021Nancy Miller-RichDirectorBuy413$12.81$5,290.53413View SEC Filing Icon  
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SEC Filings (Institutional Ownership Changes) for Aldeyra Therapeutics (NASDAQ:ALDX)

59.71% of Aldeyra Therapeutics stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at ALDX by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Aldeyra Therapeutics Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/24/2025CIBC Private Wealth Group LLC10,505$55K0.0%N/A0.017%Search for SEC Filing on Google Icon
11/21/2025CIBC Bancorp USA Inc.57,242$0.30M0.0%N/A0.095%Search for SEC Filing on Google Icon
11/17/2025Jacobs Levy Equity Management Inc.947,551$4.95M0.0%+49.4%1.575%Search for SEC Filing on Google Icon
11/17/2025Public Employees Retirement System of Ohio13,388$70K0.0%+106.0%0.022%Search for SEC Filing on Google Icon
11/17/2025Mercer Global Advisors Inc. ADV14,385$75K0.0%N/A0.024%Search for SEC Filing on Google Icon
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.25,498$0.13M0.0%-10.8%0.042%Search for SEC Filing on Google Icon
11/17/2025Bank of America Corp DE390,078$2.04M0.0%+590.5%0.648%Search for SEC Filing on Google Icon
11/17/2025Ameriprise Financial Inc.35,409$0.19M0.0%+34.8%0.059%Search for SEC Filing on Google Icon
11/14/2025Creative Planning34,848$0.18M0.0%+189.3%0.058%Search for SEC Filing on Google Icon
11/14/2025Brooklyn Investment Group12,691$66K0.0%+24,784.3%0.021%Search for SEC Filing on Google Icon
11/14/2025Two Sigma Investments LP273,054$1.43M0.0%+389.9%0.454%Search for SEC Filing on Google Icon
11/13/2025Kennedy Capital Management LLC1,112,213$5.81M0.1%+61.9%1.849%Search for SEC Filing on Google Icon
11/13/2025Sei Investments Co.39,359$0.21M0.0%N/A0.065%Search for SEC Filing on Google Icon
11/13/2025UBS Group AG200,739$1.05M0.0%+87.2%0.334%Search for SEC Filing on Google Icon
11/13/2025BNP Paribas Financial Markets10,610$55K0.0%+36.9%0.018%Search for SEC Filing on Google Icon
11/13/2025Russell Investments Group Ltd.111,102$0.58M0.0%+321.7%0.185%Search for SEC Filing on Google Icon
11/12/2025Dimensional Fund Advisors LP648,371$3.38M0.0%-9.8%1.078%Search for SEC Filing on Google Icon
11/12/2025Intech Investment Management LLC21,211$0.11M0.0%-29.3%0.035%Search for SEC Filing on Google Icon
11/7/2025GSA Capital Partners LLP122,664$0.64M0.1%+67.4%0.205%Search for SEC Filing on Google Icon
11/7/2025Vanguard Group Inc.3,591,869$18.75M0.0%+2.6%5.997%Search for SEC Filing on Google Icon
10/31/2025PFG Investments LLC66,000$0.35M0.0%-74.3%0.110%Search for SEC Filing on Google Icon
10/31/2025Y Intercept Hong Kong Ltd138,091$0.72M0.0%N/A0.231%Search for SEC Filing on Google Icon
10/30/2025Strs Ohio85,700$0.45M0.0%+4.1%0.143%Search for SEC Filing on Google Icon
10/29/2025Inscription Capital LLC12,633$66K0.0%N/A0.021%Search for SEC Filing on Google Icon
10/29/2025Wealth Enhancement Advisory Services LLC32,842$0.18M0.0%+20.4%0.055%Search for SEC Filing on Google Icon
10/15/2025CWM LLC58,379$0.31M0.0%+39.8%0.097%Search for SEC Filing on Google Icon
10/14/2025Brighton Jones LLC19,945$0.10M0.0%+11.4%0.033%Search for SEC Filing on Google Icon
10/9/2025Voya Investment Management LLC10,066$53K0.0%-33.9%0.017%Search for SEC Filing on Google Icon
8/15/2025Captrust Financial Advisors51,492$0.20M0.0%+9.1%0.086%Search for SEC Filing on Google Icon
8/15/2025Perceptive Advisors LLC4,051,631$15.52M1.4%-56.3%6.764%Search for SEC Filing on Google Icon
8/15/2025BNP Paribas Financial Markets7,751$30K0.0%-71.4%0.013%Search for SEC Filing on Google Icon
8/15/2025Bank of America Corp DE56,491$0.22M0.0%-86.2%0.094%Search for SEC Filing on Google Icon
8/15/2025683 Capital Management LLC1,080,000$4.14M0.3%+126.9%1.803%Search for SEC Filing on Google Icon
8/15/2025Ameriprise Financial Inc.26,263$0.10M0.0%N/A0.044%Search for SEC Filing on Google Icon
8/15/2025AQR Capital Management LLC1,473,812$5.65M0.0%+275.4%2.460%Search for SEC Filing on Google Icon
8/14/2025Caption Management LLC12,664$49K0.0%-110.6%0.021%Search for SEC Filing on Google Icon
8/14/2025The Manufacturers Life Insurance Company 20,074$77K0.0%+10.9%0.034%Search for SEC Filing on Google Icon
8/14/2025Ardsley Advisory Partners LP2,050,000$7.85M1.0%-4.7%3.422%Search for SEC Filing on Google Icon
8/14/2025Cerity Partners LLC36,577$0.14M0.0%N/A0.061%Search for SEC Filing on Google Icon
8/13/2025Kennedy Capital Management LLC686,968$2.63M0.1%-44.3%1.147%Search for SEC Filing on Google Icon
8/13/2025Invesco Ltd.122,566$0.47M0.0%-75.5%0.205%Search for SEC Filing on Google Icon
8/13/2025Panagora Asset Management Inc.72,059$0.28M0.0%+42.8%0.120%Search for SEC Filing on Google Icon
8/13/2025Kennondale Capital Management LLC56,729$0.22M0.2%-62.5%0.095%Search for SEC Filing on Google Icon
8/12/2025Rhumbline Advisers77,494$0.30M0.0%+2.7%0.129%Search for SEC Filing on Google Icon
8/8/2025Intech Investment Management LLC29,983$0.12M0.0%+27.6%0.050%Search for SEC Filing on Google Icon
8/8/2025King Wealth Management Group12,100$46K0.0%N/A0.020%Search for SEC Filing on Google Icon
8/8/2025Geode Capital Management LLC1,146,597$4.39M0.0%+0.8%1.914%Search for SEC Filing on Google Icon
8/7/2025Los Angeles Capital Management LLC16,320$63K0.0%N/A0.027%Search for SEC Filing on Google Icon
8/6/2025Savant Capital LLC144,104$0.55M0.0%N/A0.241%Search for SEC Filing on Google Icon
8/5/2025Corton Capital Inc.14,940$57K0.1%N/A0.025%Search for SEC Filing on Google Icon
7/31/2025Brighton Jones LLC17,899$69K0.0%N/A0.030%Search for SEC Filing on Google Icon
7/29/2025Ballast Inc.31,623$0.12M0.0%N/A0.053%Search for SEC Filing on Google Icon
7/25/2025CWM LLC41,758$0.16M0.0%+117.0%0.070%Search for SEC Filing on Google Icon
7/18/2025PFG Investments LLC257,300$0.99M0.1%+397.2%0.430%Search for SEC Filing on Google Icon
7/15/2025Public Employees Retirement System of Ohio6,500$25K0.0%N/A0.011%Search for SEC Filing on Google Icon
7/10/2025Wealth Enhancement Advisory Services LLC27,286$0.11M0.0%+150.1%0.046%Search for SEC Filing on Google Icon
7/9/2025Pallas Capital Advisors LLC17,762$68K0.0%N/A0.030%Search for SEC Filing on Google Icon
7/9/2025Inspirion Wealth Advisors LLC10,000$38K0.0%N/A0.017%Search for SEC Filing on Google Icon
7/9/2025Woodstock Corp266,756$1.02M0.1%+19.6%0.445%Search for SEC Filing on Google Icon
6/27/2025Goldman Sachs Group Inc.124,365$0.72M0.0%-48.3%0.208%Search for SEC Filing on Google Icon
5/28/2025Strs Ohio76,500$0.44M0.0%N/A0.128%Search for SEC Filing on Google Icon
5/21/2025Acadian Asset Management LLC95,960$0.55M0.0%+7,402.7%0.160%Search for SEC Filing on Google Icon
5/19/2025Jane Street Group LLC178,110$1.02M0.0%N/A0.297%Search for SEC Filing on Google Icon
5/16/2025Goldman Sachs Group Inc.124,365$0.72M0.0%-48.3%0.208%Search for SEC Filing on Google Icon
5/16/2025Jacobs Levy Equity Management Inc.37,984$0.22M0.0%N/A0.063%Search for SEC Filing on Google Icon
5/16/2025AQR Capital Management LLC392,555$2.26M0.0%+456.3%0.655%Search for SEC Filing on Google Icon
5/16/2025683 Capital Management LLC476,000$2.74M0.2%+64.1%0.795%Search for SEC Filing on Google Icon
5/16/2025ADAR1 Capital Management LLC211,579$1.22M0.2%-67.3%0.353%Search for SEC Filing on Google Icon
5/15/2025Kingdon Capital Management L.L.C.779,000$4.48M0.5%N/A1.301%Search for SEC Filing on Google Icon
5/15/2025Trexquant Investment LP158,117$0.91M0.0%+38.1%0.264%Search for SEC Filing on Google Icon
5/14/2025Ieq Capital LLC44,145$0.25M0.0%N/A0.074%Search for SEC Filing on Google Icon
5/14/2025Wellington Management Group LLP117,475$0.68M0.0%N/A0.196%Search for SEC Filing on Google Icon
5/13/2025Fox Run Management L.L.C.22,912$0.13M0.0%N/A0.038%Search for SEC Filing on Google Icon
5/13/2025Russell Investments Group Ltd.27,042$0.16M0.0%N/A0.045%Search for SEC Filing on Google Icon
5/12/2025Invesco Ltd.501,137$2.88M0.0%+1,575.7%0.837%Search for SEC Filing on Google Icon
5/9/2025Deutsche Bank AG314,423$1.81M0.0%-1.5%0.525%Search for SEC Filing on Google Icon
5/9/2025Vanguard Group Inc.3,718,018$21.38M0.0%-1.0%6.207%Search for SEC Filing on Google Icon
5/8/2025XTX Topco Ltd23,332$0.13M0.0%N/A0.039%Search for SEC Filing on Google Icon
5/1/2025CWM LLC19,244$0.11M0.0%+1,164.4%0.032%Search for SEC Filing on Google Icon
4/30/2025Alps Advisors Inc.43,803$0.25M0.0%-9.0%0.073%Search for SEC Filing on Google Icon
4/29/2025Bank of New York Mellon Corp110,931$0.64M0.0%-5.0%0.186%Search for SEC Filing on Google Icon
4/25/2025Capital Advisors Wealth Management LLC10,800$62K0.0%N/A0.018%Search for SEC Filing on Google Icon
4/23/2025International Assets Investment Management LLC48,640$0.28M0.0%-18.6%0.081%Search for SEC Filing on Google Icon
4/22/2025PFG Investments LLC51,750$0.30M0.0%-85.1%0.087%Search for SEC Filing on Google Icon
4/16/2025Wealth Enhancement Advisory Services LLC10,910$63K0.0%N/A0.018%Search for SEC Filing on Google Icon
4/10/2025Hennion & Walsh Asset Management Inc.69,442$0.40M0.0%-18.7%0.116%Search for SEC Filing on Google Icon
4/9/2025Woodstock Corp223,094$1.28M0.1%+14.5%0.374%Search for SEC Filing on Google Icon
2/20/2025Mackenzie Financial Corp47,792$0.24M0.0%+310.9%0.080%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Advisers LP125,300$0.63M0.0%-40.1%0.210%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP131,410$0.66M0.0%-10.5%0.221%Search for SEC Filing on Google Icon
2/17/2025ProShare Advisors LLC14,031$70K0.0%N/A0.024%Search for SEC Filing on Google Icon
2/17/2025Millennium Management LLC161,926$0.81M0.0%N/A0.272%Search for SEC Filing on Google Icon
2/17/2025Letko Brosseau & Associates Inc.17,300$86K0.0%N/A0.029%Search for SEC Filing on Google Icon
2/17/2025D. E. Shaw & Co. Inc.188,583$0.94M0.0%-43.7%0.317%Search for SEC Filing on Google Icon
2/17/2025Deutsche Bank AG319,287$1.59M0.0%+6.2%0.536%Search for SEC Filing on Google Icon
2/17/2025Balyasny Asset Management L.P.11,278$56K0.0%N/A0.019%Search for SEC Filing on Google Icon
2/17/2025Bank of America Corp DE306,246$1.53M0.0%-18.4%0.514%Search for SEC Filing on Google Icon
2/17/2025BNP Paribas Financial Markets6,355$32K0.0%-55.3%0.011%Search for SEC Filing on Google Icon
2/17/2025683 Capital Management LLC290,000$1.45M0.1%N/A0.487%Search for SEC Filing on Google Icon
2/14/2025Northern Trust Corp405,517$2.02M0.0%+4.3%0.681%Search for SEC Filing on Google Icon
Data available starting January 2016

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Aldeyra Therapeutics logo
Aldeyra Therapeutics is a clinical-stage biotechnology company focused on the development of novel therapies with the potential to improve the lives of patients with immune-mediated diseases. Two of the company's lead compounds, reproxalap and ADX-629, target reactive aldehyde species (RASP), which are elevated in ocular and systemic inflammatory disease, leading to elevated levels of cytokine release via activation of a broad array of inflammatory factors, including NF-κB, inflammasomes, and Scavenger Receptor A. Reproxalap is being evaluated in Phase 3 clinical trials in patients with dry eye disease and allergic conjunctivitis. The company's clinical pipeline also includes ADX-2191, a dihydrofolate reductase inhibitor in Phase 3 testing for proliferative vitreoretinopathy, and ADX-1612, a chaperome inhibitor in Phase 2 testing for COVID-19 and ovarian cancer.
Read More on Aldeyra Therapeutics

Today's Range

Now: $4.88
Low: $4.81
High: $5.02

50 Day Range

MA: $5.21
Low: $4.69
High: $5.74

52 Week Range

Now: $4.88
Low: $1.14
High: $7.20

Volume

894,536 shs

Average Volume

800,090 shs

Market Capitalization

$293.58 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

0.83

Who are the company insiders with the largest holdings of Aldeyra Therapeutics?

Aldeyra Therapeutics' top insider investors include:
  1. Perceptive Advisors Llc (Major Shareholder)
  2. Todd C Brady (CEO)
  3. Stephen Machatha (Insider)
  4. Bruce Greenberg (Insider)
Learn More about top insider investors at Aldeyra Therapeutics.

Who are the major institutional investors of Aldeyra Therapeutics?

Aldeyra Therapeutics' top institutional shareholders include:
  1. Vanguard Group Inc. — 6.00%
  2. Kennedy Capital Management LLC — 1.85%
  3. Jacobs Levy Equity Management Inc. — 1.57%
  4. Dimensional Fund Advisors LP — 1.08%
  5. Bank of America Corp DE — 0.65%
  6. Two Sigma Investments LP — 0.45%
Learn More about top institutional investors of Aldeyra Therapeutics stock.

Which major investors are selling Aldeyra Therapeutics stock?

In the last quarter, ALDX stock was sold by these institutional investors:
  1. PFG Investments LLC
  2. Dimensional Fund Advisors LP
  3. Intech Investment Management LLC
  4. Voya Investment Management LLC
  5. MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
During the previous year, company insiders that have sold Aldeyra Therapeutics company stock include:
  1. Perceptive Advisors Llc (Major Shareholder)
  2. Todd C Brady (CEO)
Learn More investors selling Aldeyra Therapeutics stock.

Which major investors are buying Aldeyra Therapeutics stock?

During the last quarter, ALDX stock was acquired by institutional investors including:
  1. Kennedy Capital Management LLC
  2. Bank of America Corp DE
  3. Jacobs Levy Equity Management Inc.
  4. Two Sigma Investments LP
  5. Y Intercept Hong Kong Ltd
  6. UBS Group AG
  7. Vanguard Group Inc.
  8. Russell Investments Group Ltd.