Mark James Litton insider trades: LeonaBio (LONA) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
Open-market buys and sales
22 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 4, 2026 | LONA | ↓ Sell | 5,156 | $5.37 | $28K | Direct | Mar 5, 2026 (1d) |
| Jan 2, 2026 | ATHA | ↓ Sell | 2,586 | $6.88 | $18K | Direct | Jan 5, 2026 (3d) |
| Jul 1, 2025 | ATHA | ↓ Sell | 25,123 | $0.29 | $7K | Direct | Jul 2, 2025 (1d) |
| Jan 2, 2025 | ATHA | ↓ Sell | 25,107 | $0.56 | $14K | Direct | Jan 3, 2025 (1d) |
| Sep 5, 2024 | ATHA | ↓ Sell | 5,032 | $0.57 | $3K | Direct | Sep 5, 2024 (0d) |
| Jan 5, 2024 | ATHA | ↓ Sell | 4,820 | $2.91 | $14K | Direct | Jan 8, 2024 (3d) |
| Jun 23, 2022 | ATHA | ↓ Sell | 7,960 | $2.69 | $21K | Direct | Jun 24, 2022 (1d) |
| Jun 1, 2018 | ALDR | ↓ Sell10b5-1 | 22,727 | $17.84 | $405K | Direct | Jun 5, 2018 (4d) |
| Nov 13, 2017 | ALDR | ↓ Sell10b5-1 | 16,519 | $10.80 | $178K | Direct | Nov 15, 2017 (2d) |
| Oct 16, 2017 | ALDR | ↓ Sell10b5-1 | 16,520 | $12.33 | $204K | Direct | Oct 18, 2017 (2d) |
| Jan 18, 2017 | ALDR | ↓ Sell10b5-1 | 1,498 | $23.10 | $35K | Direct | Jan 20, 2017 (2d) |
| Jan 9, 2017 | ALDR | ↓ Sell10b5-1 | 9,516 | $23.01 | $219K | Direct | Jan 9, 2017 (0d) |
| Oct 17, 2016 | ALDR | ↓ Sell10b5-1 | 6,000 | $27.50 | $165K | Held in trust for the benefit of Reporti | Oct 19, 2016 (2d) |
| Jun 13, 2016 | ALDR | ↓ Sell10b5-1 | 5,900 | $28.93 | $171K | Held in trust for the benefit of Reporti | Jun 15, 2016 (2d) |
| May 31, 2016 | ALDR | ↓ Sell10b5-1 | 25,000 | $30.05 | $751K | Direct | Jun 1, 2016 (1d) |
| Jan 4, 2016 | ALDR | ↓ Sell10b5-1 | 25,000 | $31.40 | $785K | Direct | Jan 6, 2016 (2d) |
| Oct 1, 2015 | ALDR | ↓ Sell10b5-1 | 7,500 | $32.27 | $242K | Direct | Oct 5, 2015 (4d) |
| Jul 1, 2015 | ALDR | ↓ Sell10b5-1 | 7,500 | $51.10 | $383K | Direct | Jul 6, 2015 (5d) |
| Jun 4, 2015 | ALDR | ↓ Sell | 25,000 | $44.27 | $1.1M | Direct | Jun 8, 2015 (4d) |
| Apr 1, 2015 | ALDR | ↓ Sell10b5-1 | 7,500 | $27.41 | $206K | Direct | Apr 3, 2015 (2d) |
| Jan 27, 2015 | ALDR | ↓ Sell10b5-1 | 7,500 | $28.18 | $211K | Direct | Jan 28, 2015 (1d) |
| Nov 20, 2014 | ALDR | ↓ Sell | 30,000 | $15.63 | $469K | Direct | Nov 24, 2014 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other LONA insiders
Open-market trades in the last 12 months
About Mark James Litton's insider trades
Mark James Litton is PRESIDENT and CEO at LeonaBio (LONA). Since Nov 20, 2014, Mark has reported no open-market purchases and 22 sales worth $5.6M on SEC Form 4. In the last 12 months: 2 sales ($45K).
13 sales (70% of the value sold) were made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so they say little about how the insider sees the stock today.
Their filings also include grants and awards (19 filings), option exercises (15 filings), conversions (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 LONA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.