Mark Frichtl, Chief Technology Officer at Ouster, Inc. ($OUST), sold shares on the open market twice in the last year, totaling about $1.1 million. His most recent sale occurred on December 12, 2025. These OUST insider sales rank 4,678th among 11,678 individual insiders in our database, where the average is $8.6 million across about 6.4 transactions. Frichtl made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 4316 | $0.00 | 50,063.0000 | 60,005,219 | 7.94% | 0.01% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 21341 | $0.00 | 94,379.0000 | 60,005,219 | 18.44% | 0.04% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 31434 | $0.00 | 0.0000 | 60,005,219 | 100.00% | 0.05% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 13659 | $34.00 | 628,638.0000 | 60,005,219 | 2.13% | 0.02% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 32500 | $33.00 | 642,297.0000 | 60,005,219 | 4.82% | 0.05% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 2500 | $33.00 | 674,797.0000 | 60,005,219 | 0.37% | 0.00% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 35000 | $32.00 | 677,297.0000 | 60,005,219 | 4.91% | 0.06% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 21341 | $34.00 | 712,297.0000 | 60,005,219 | 2.91% | 0.04% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 21341 | $14.22 | 733,638.0000 | 60,005,219 | 3.00% | 0.04% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 31434 | $31.09 | 712,297.0000 | 60,005,219 | 4.23% | 0.05% |
| May 13, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 31434 | $2.13 | 743,731.0000 | 60,005,219 | 4.41% | 0.05% |
| May 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 40000 | $0.00 | 54,379.0000 | 60,005,219 | 42.38% | 0.07% |
| May 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 4316 | $36.00 | 628,638.0000 | 60,005,219 | 0.68% | 0.01% |
| May 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 4316 | $14.22 | 632,954.0000 | 60,005,219 | 0.69% | 0.01% |
| May 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 40000 | $35.00 | 628,638.0000 | 60,005,219 | 5.98% | 0.07% |
| May 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 40000 | $14.22 | 668,638.0000 | 60,005,219 | 6.36% | 0.07% |
| May 5, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 13451 | $2.13 | 725,748.0000 | 60,005,219 | 1.89% | 0.02% |
| May 5, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 13451 | $0.00 | 31,434.0000 | 60,005,219 | 29.97% | 0.02% |
| May 4, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 21149 | $0.00 | 44,885.0000 | 60,005,219 | 32.03% | 0.04% |
| May 4, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 21149 | $30.13 | 712,297.0000 | 60,005,219 | 2.88% | 0.04% |
| May 5, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 13451 | $30.00 | 712,297.0000 | 60,005,219 | 1.85% | 0.02% |
| May 4, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 21149 | $2.13 | 733,446.0000 | 60,005,219 | 2.97% | 0.04% |
| April 22, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 400 | $2.13 | 712,697.0000 | 60,005,219 | 0.06% | 0.00% |
| April 22, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 400 | $30.00 | 712,297.0000 | 60,005,219 | 0.06% | 0.00% |
| April 22, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 400 | $0.00 | 66,034.0000 | 60,005,219 | 0.60% | 0.00% |
| April 21, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 30000 | $28.11 | 742,297.0000 | 60,005,219 | 3.88% | 0.05% |
| April 20, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 60000 | $2.13 | 772,297.0000 | 60,005,219 | 8.42% | 0.10% |
| April 20, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 30000 | $26.08 | 742,297.0000 | 60,005,219 | 3.88% | 0.05% |
| April 20, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 30000 | $27.08 | 712,297.0000 | 60,005,219 | 4.04% | 0.05% |
| April 21, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 60000 | $2.13 | 772,297.0000 | 60,005,219 | 8.42% | 0.10% |
| April 21, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 30000 | $29.02 | 712,297.0000 | 60,005,219 | 4.04% | 0.05% |
| April 20, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 60000 | $0.00 | 126,434.0000 | 60,005,219 | 32.18% | 0.10% |
| April 21, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 60000 | $0.00 | 66,434.0000 | 60,005,219 | 47.46% | 0.10% |
| April 17, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 30000 | $2.13 | 742,297.0000 | 60,005,219 | 4.21% | 0.05% |
| April 17, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 30000 | $0.00 | 186,434.0000 | 60,005,219 | 13.86% | 0.05% |
| April 17, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 30000 | $25.15 | 712,297.0000 | 60,005,219 | 4.04% | 0.05% |
| April 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 20000 | $24.00 | 712,297.0000 | 60,005,219 | 2.73% | 0.03% |
| April 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 20000 | $2.13 | 732,297.0000 | 60,005,219 | 2.81% | 0.03% |
| April 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 40000 | $22.76 | 712,297.0000 | 60,005,219 | 5.32% | 0.07% |
| April 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 40000 | $2.13 | 752,297.0000 | 60,005,219 | 5.62% | 0.07% |
| April 15, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 20000 | $0.00 | 216,434.0000 | 60,005,219 | 8.46% | 0.03% |
| April 14, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 40000 | $0.00 | 236,434.0000 | 60,005,219 | 14.47% | 0.07% |
| April 11, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | A | Common Stock | 75415 | $0.00 | 712,297.0000 | 60,005,219 | 11.84% | 0.13% |
| March 25, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Non-Qualified Stock Option | 40000 | $0.00 | 276,434.0000 | 60,005,219 | 12.64% | 0.07% |
| March 25, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | M | Common Stock | 40000 | $2.13 | 676,882.0000 | 60,005,219 | 6.28% | 0.07% |
| March 25, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 40000 | $20.94 | 636,882.0000 | 60,005,219 | 5.91% | 0.07% |
| March 12, 2026 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 15689 | $23.43 | 636,882.0000 | 60,005,219 | 2.40% | 0.03% |
| Dec. 12, 2025 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 15661 | $24.98 | 652,571.0000 | 60,005,219 | 2.34% | 0.03% |
| Sept. 12, 2025 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | S | Common Stock | 25329 | $28.46 | 665,403.0000 | 53,765,990 | 3.67% | 0.05% |
| April 1, 2025 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | A | Common Stock | 175000 | $0.00 | 688,121.0000 | 53,765,990 | 34.11% | 0.33% |
| Dec. 12, 2024 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | P | Common Stock | 4545 | $9.78 | 512,621.0000 | 0 | 0.89% | 0.00% |
| Dec. 12, 2024 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | P | Common Stock | 500 | $9.78 | 513,121.0000 | 0 | 0.10% | 0.00% |
| May 15, 2024 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | P | Common Stock | 8000 | $12.34 | 505,076.0000 | 0 | 1.61% | 0.00% |
| March 28, 2024 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | A | Common Stock | 92319 | $0.00 | 494,076.0000 | 0 | 22.98% | 0.00% |
| May 16, 2023 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | P | Common Stock | 25700 | $5.84 | 398,757.0000 | 0 | 6.89% | 0.00% |
| May 16, 2023 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | P | Common Stock | 25700 | $5.84 | 3,749,512.0000 | 0 | 0.69% | 0.00% |
| March 20, 2023 | Ouster, Inc. | $OUST | Frichtl Mark | Chief Technology Officer | A | Common Stock | 375000 | $0.00 | 3,718,636.0000 | 0 | 11.22% | 0.00% |