Mason David W, Chief Legal Officer at SEMrush Holdings, Inc. ($SEMR), sold shares on the open market twice in the last 365 days for a total of $1.24 million. His most recent sale occurred on March 5, 2026. These sales rank 4,446th among 11,678 individual insiders in our database, where the average sale totals $8.6 million across about 6.4 transactions. Mason David W 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 5, 2026 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | S | Class A Common Stock | 97372 | $11.93 | 271,248.0000 | 148,824,272 | 26.42% | 0.07% |
| Dec. 15, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 26054 | $11.86 | 368,620.0000 | 148,824,272 | 6.60% | 0.02% |
| Dec. 15, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | A | Class A Common Stock | 143338 | $0.00 | 394,674.0000 | 148,824,272 | 57.03% | 0.10% |
| Dec. 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 3592 | $11.83 | 251,336.0000 | 148,824,272 | 1.41% | 0.00% |
| Nov. 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 2537 | $7.26 | 254,928.0000 | 148,824,272 | 0.99% | 0.00% |
| Sept. 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 2486 | $7.90 | 257,465.0000 | 148,862,000 | 0.96% | 0.00% |
| Aug. 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 1751 | $8.49 | 259,951.0000 | 148,862,000 | 0.67% | 0.00% |
| June 3, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | S | Class A Common Stock | 7500 | $10.03 | 261,702.0000 | 148,862,000 | 2.79% | 0.01% |
| June 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 2181 | $9.84 | 269,202.0000 | 148,862,000 | 0.80% | 0.00% |
| May 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | F | Class A Common Stock | 1541 | $10.38 | 271,383.0000 | 148,862,000 | 0.56% | 0.00% |
| March 3, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | S | Class A Common Stock | 9127 | $11.14 | 272,924.0000 | 148,862,000 | 3.24% | 0.01% |
| March 1, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | Chief Legal Officer | A | Class A Common Stock | 123636 | $0.00 | 282,051.0000 | 148,862,000 | 78.05% | 0.08% |
| Feb. 3, 2025 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | S | Class A Common Stock | 1875 | $17.15 | 158,415.0000 | 148,862,000 | 1.17% | 0.00% |
| Nov. 4, 2024 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | S | Class A Common Stock | 1589 | $13.14 | 160,290.0000 | 149,427,000 | 0.98% | 0.00% |
| Aug. 2, 2024 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | S | Class A Common Stock | 1667 | $13.47 | 161,879.0000 | 146,065,333 | 1.02% | 0.00% |
| May 2, 2024 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | S | Class A Common Stock | 1549 | $12.62 | 163,546.0000 | 146,065,333 | 0.94% | 0.00% |
| March 1, 2024 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | A | Class A Common Stock | 89171 | $0.00 | 165,095.0000 | 146,065,333 | 117.45% | 0.06% |
| Feb. 2, 2024 | SEMrush Holdings, Inc. | $SEMR | Mason David W | General Counsel | S | Class A Common Stock | 1876 | $11.27 | 75,924.0000 | 146,065,333 | 2.41% | 0.00% |