David R. Horn, President and CFO of Seer, Inc. ($SEER), sold shares on the open market four times in the last year, totaling about $57,000. His most recent sale occurred on February 18, 2026. These sales rank him 10,264th among 11,678 insiders by total value sold, well below the average of $8.6 million across about 6.4 transactions per insider. Horn 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 18, 2026 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 7743 | $1.99 | 501,262.0000 | 55,786,344 | 1.52% | 0.01% |
| Feb. 3, 2026 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | A | Employee Stock Option (right to buy) | 119000 | $0.00 | 119,000.0000 | 55,786,344 | 9999.99% | 0.21% |
| Feb. 3, 2026 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | A | Class A Common Stock | 79000 | $0.00 | 509,005.0000 | 55,786,344 | 18.37% | 0.14% |
| Nov. 19, 2025 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 6797 | $1.97 | 436,802.0000 | 55,786,344 | 1.53% | 0.01% |
| Aug. 20, 2025 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 6827 | $2.04 | 436,802.0000 | 56,328,539 | 1.54% | 0.01% |
| May 20, 2025 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 6760 | $2.08 | 443,629.0000 | 59,430,035 | 1.50% | 0.01% |
| Feb. 18, 2025 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | F | Class A Common Stock | 26572 | $2.30 | 450,389.0000 | 59,128,092 | 5.57% | 0.04% |
| Feb. 4, 2025 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 3550 | $2.24 | 476,961.0000 | 59,128,092 | 0.74% | 0.01% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 87 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.00% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 87 | $0.00 | 87.0000 | 59,584,853 | 9999.99% | 0.00% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 20 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.00% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 20 | $0.00 | 20.0000 | 59,584,853 | 9999.99% | 0.00% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 135100 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.23% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 135100 | $0.00 | 135,100.0000 | 59,584,853 | 9999.99% | 0.23% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 34125 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.06% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 34125 | $0.00 | 34,125.0000 | 59,584,853 | 9999.99% | 0.06% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 124000 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.21% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 566460 | $0.00 | 566,460.0000 | 59,584,853 | 9999.99% | 0.95% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 140000 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.23% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 140000 | $0.00 | 140,000.0000 | 59,584,853 | 9999.99% | 0.23% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 124000 | $0.00 | 124,000.0000 | 59,584,853 | 9999.99% | 0.21% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 140662 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.24% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | A | Employee Stock Option (right to buy) | 140662 | $0.00 | 140,662.0000 | 59,584,853 | 9999.99% | 0.24% |
| Oct. 4, 2024 | Seer, Inc. | $SEER | Horn David R. | President & CFO | D | Employee Stock Option (right to buy) | 566460 | $0.00 | 0.0000 | 59,584,853 | 100.00% | 0.95% |
| Feb. 6, 2024 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | A | Class A Common Stock | 165038 | $0.00 | 493,195.0000 | 64,298,676 | 50.29% | 0.26% |
| Feb. 6, 2024 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | A | Employee Stock Option (right to buy) | 142557 | $0.00 | 142,557.0000 | 64,298,676 | 9999.99% | 0.22% |
| Feb. 22, 2024 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | S | Class A Common Stock | 12684 | $1.58 | 480,511.0000 | 64,298,676 | 2.57% | 0.02% |
| Feb. 6, 2024 | Seer, Inc. | $SEER | Horn David R. | PRESIDENT & CFO | A | Employee Stock Option (right to buy) | 140000 | $0.00 | 140,000.0000 | 64,298,676 | 9999.99% | 0.22% |
| Feb. 5, 2024 | Seer, Inc. | $SEER | Horn David R. | President and CFO | S | Class A Common Stock | 3608 | $1.67 | 328,157.0000 | 64,298,676 | 1.09% | 0.01% |