Mark Frichtl insider trades: Ouster (OUST) stock buys and 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
14 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | OUST | ↓ Sell10b5-1 | 18,778 | $33.96 | $638K | Direct | Sep 16, 2026 (2d) |
| Jun 12, 2026 | OUST | ↓ Sell10b5-1 | 18,414 | $38.82 | $715K | Direct | Jun 16, 2026 (4d) |
| May 26, 2026 | OUST | ↓ Sell10b5-1 | 384,426 | $40.60 | $15.6M | Direct | May 27, 2026 (1d) |
| May 15, 2026 | OUST | ↓ Sell10b5-1 | 180,750 | $33.18 | $6.0M | Direct | May 15, 2026 (0d) |
| May 5, 2026 | OUST | ↓ Sell10b5-1 | 34,600 | $30.08 | $1.0M | Direct | May 6, 2026 (1d) |
| Apr 21, 2026 | OUST | ↓ Sell10b5-1 | 120,000 | $27.57 | $3.3M | Direct | Apr 21, 2026 (0d) |
| Apr 17, 2026 | OUST | ↓ Sell10b5-1 | 30,000 | $25.15 | $754K | Direct | Apr 17, 2026 (0d) |
| Apr 15, 2026 | OUST | ↓ Sell10b5-1 | 60,000 | $23.17 | $1.4M | Direct | Apr 15, 2026 (0d) |
| Mar 12, 2026 | OUST | ↓ Sell10b5-1 | 15,689 | $23.43 | $368K | Direct | Mar 16, 2026 (4d) |
| Dec 12, 2025 | OUST | ↓ Sell10b5-1 | 15,661 | $24.98 | $391K | Direct | Dec 16, 2025 (4d) |
| Sep 12, 2025 | OUST | ↓ Sell | 25,329 | $28.46 | $721K | Direct | Sep 16, 2025 (4d) |
| Dec 12, 2024 | OUST | ↑ Buy | 5,045 | $9.78 | $49K | Direct | Dec 16, 2024 (4d) |
| May 15, 2024 | OUST | ↑ Buy | 8,000 | $12.34 | $99K | Direct | May 16, 2024 (1d) |
| May 16, 2023 | OUST | ↑ Buy | 25,700 | $5.84 | $150K | Direct | May 18, 2023 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other OUST insiders
Open-market trades in the last 12 months
About Mark Frichtl's insider trades
Mark Frichtl is Chief Technology Officer at Ouster (OUST). Since May 16, 2023, Mark has reported 3 open-market purchases worth $298K and 11 sales worth $30.9M on SEC Form 4. In the last 12 months: 10 sales ($30.2M).
10 sales (98% 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 option exercises (7 filings), grants and awards (5 filings), gifts (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 OUST insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.