Richard Douglas insider trades: Aldeyra Therapeutics (ALDX) stock purchases
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Richard reports to the SEC
Open-market buys and sales
16 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 19, 2026 | ALDX | ↑ Buy | 70,000 | $1.40 | $98K | Direct | Mar 20, 2026 (1d) |
| Aug 13, 2025 | MXCT | ↑ Buy | 80,000 | $1.39 | $111K | Direct | Aug 13, 2025 (0d) |
| Mar 29, 2023 | MXCT | ↑ Buy | 80,000 | $4.32 | $345K | Direct | Mar 30, 2023 (1d) |
| Nov 22, 2021 | MXCT | ↑ Buy | 20,000 | $11.12 | $222K | Direct | Nov 23, 2021 (1d) |
| Mar 16, 2020 | ALDX | ↑ Buy | 40,000 | $2.75 | $110K | Direct | Mar 17, 2020 (1d) |
| Sep 13, 2019 | ALDX | ↑ Buy | 5,000 | $6.00 | $30K | Direct | Sep 17, 2019 (4d) |
| Sep 12, 2019 | ALDX | ↑ Buy | 20,000 | $5.89 | $118K | Direct | Sep 13, 2019 (1d) |
| Sep 10, 2019 | ALDX | ↑ Buy | 20,000 | $5.00 | $100K | Direct | Sep 11, 2019 (1d) |
| May 11, 2017 | NVAX | ↑ Buy | 200,000 | $0.93 | $186K | Direct | May 12, 2017 (1d) |
| Feb 17, 2017 | ALDX | ↑ Buy | 40,000 | $4.50 | $180K | Direct | Feb 21, 2017 (4d) |
| Sep 21, 2016 | NVAX | ↑ Buy | 100,000 | $1.72 | $172K | Direct | Sep 22, 2016 (1d) |
| Mar 25, 2014 | NVAX | ↑ Buy | 50,000 | $4.33 | $217K | Direct | Mar 25, 2014 (0d) |
| Jun 12, 2013 | NVAX | ↑ Buy | 50,000 | $1.90 | $95K | Direct | Jun 13, 2013 (1d) |
| Apr 10, 2012 | NVAX | ↑ Buy | 50,000 | $1.21 | $61K | Direct | Apr 11, 2012 (1d) |
| Aug 9, 2011 | NVAX | ↑ Buy | 50,000 | $1.20 | $60K | Direct | Aug 11, 2011 (2d) |
| Jun 20, 2011 | NVAX | ↑ Buy | 50,000 | $2.04 | $102K | Direct | Jun 21, 2011 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
About Richard Douglas's insider trades
Richard Douglas is an insider at Aldeyra Therapeutics (ALDX). Since Jun 20, 2011, Richard has reported 16 open-market purchases worth $2.2M and no sales on SEC Form 4. In the last 12 months: 1 buy ($98K).
Their filings also include grants and awards (36 filings), option exercises (8 filings), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ALDX insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.