Tappin Matthew, President of Software Products at STEM Inc. ($STEM), sold shares on the open market eight times in the last year, totaling about $200,000. His most recent sale occurred on March 11, 2026. These sales rank 8,413th among 11,678 insiders in our database, where the average is $8.6 million across 6.4 transactions. Tappin Matthew 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 11, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 402 | $10.83 | 2,823.0000 | 8,389,951 | 12.47% | 0.00% |
| March 7, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Common Stock, Par Value $0.0001 Per Share | 1458 | $0.00 | 3,880.0000 | 8,389,951 | 60.20% | 0.02% |
| March 7, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Restricted Stock Unit | 1458 | $0.00 | 1,459.0000 | 8,389,951 | 49.98% | 0.02% |
| March 10, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 655 | $11.12 | 3,225.0000 | 8,389,951 | 16.88% | 0.01% |
| March 3, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 300 | $9.67 | 2,607.0000 | 8,389,951 | 10.32% | 0.00% |
| March 4, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 185 | $10.00 | 2,422.0000 | 8,389,951 | 7.10% | 0.00% |
| March 1, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Restricted Stock Unit | 670 | $0.00 | 0.0000 | 8,389,951 | 100.00% | 0.01% |
| March 1, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Common Stock, Par Value $0.0001 Per Share | 670 | $0.00 | 2,907.0000 | 8,389,951 | 29.95% | 0.01% |
| Feb. 26, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | A | Performance Stock Unit | 17200 | $0.00 | 17,200.0000 | 8,389,951 | 9999.99% | 0.21% |
| Feb. 26, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | A | Restricted Stock Unit | 25800 | $0.00 | 25,800.0000 | 8,389,951 | 9999.99% | 0.31% |
| Feb. 20, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 366 | $11.40 | 2,237.0000 | 8,389,951 | 14.06% | 0.00% |
| Feb. 19, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | F | Common Stock, Par Value $0.0001 Per Share | 522 | $11.30 | 2,603.0000 | 8,389,951 | 16.70% | 0.01% |
| Feb. 15, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Common Stock, Par Value $0.0001 Per Share | 1253 | $0.00 | 3,125.0000 | 8,389,951 | 66.93% | 0.01% |
| Feb. 15, 2026 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Restricted Stock Unit | 1253 | $0.00 | 0.0000 | 8,389,951 | 100.00% | 0.01% |
| Nov. 11, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | S | Common Stock, Par Value $0.0001 Per Share | 9584 | $17.70 | 1,872.0000 | 8,389,951 | 83.66% | 0.11% |
| Nov. 7, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Common Stock, Par Value $0.0001 Per Share | 15000 | $0.00 | 16,872.0000 | 8,389,951 | 801.28% | 0.18% |
| Nov. 10, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | F | Common Stock, Par Value $0.0001 Per Share | 5416 | $18.27 | 11,456.0000 | 8,389,951 | 32.10% | 0.06% |
| Nov. 7, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Products | M | Restricted Stock Unit | 15000 | $0.00 | 0.0000 | 8,389,951 | 100.00% | 0.18% |
| July 28, 2025 | STEM, INC. | $STEM | Tappin Matthew | PRESIDENT, SOFTWARE DIVISION | A | Restricted Stock Unit | 10000 | $0.00 | 10,000.0000 | 8,358,370 | 9999.99% | 0.12% |
| July 28, 2025 | STEM, INC. | $STEM | Tappin Matthew | PRESIDENT, SOFTWARE DIVISION | A | Performance Stock Unit | 10000 | $0.00 | 10,000.0000 | 8,358,370 | 9999.99% | 0.12% |
| June 30, 2025 | STEM, INC. | $STEM | Tappin Matthew | PRESIDENT, SOFTWARE DIVISION | A | Stock Options | 5500 | $0.00 | 5,500.0000 | 8,358,370 | 9999.99% | 0.07% |
| June 30, 2025 | STEM, INC. | $STEM | Tappin Matthew | PRESIDENT, SOFTWARE DIVISION | A | Restricted Stock Unit | 11000 | $0.00 | 11,000.0000 | 8,358,370 | 9999.99% | 0.13% |
| June 30, 2025 | STEM, INC. | $STEM | Tappin Matthew | PRESIDENT, SOFTWARE DIVISION | A | Performance Stock Unit | 5500 | $0.00 | 5,500.0000 | 8,358,370 | 9999.99% | 0.07% |
| June 16, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | S | Common Stock, Par Value $0.0001 Per Share | 20823 | $0.45 | 37,458.0000 | 162,797,684 | 35.73% | 0.01% |
| May 29, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Common Stock, Par Value $0.0001 Per Share | 2775 | $0.00 | 59,445.0000 | 162,797,684 | 4.90% | 0.00% |
| May 30, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | S | Common Stock, Par Value $0.0001 Per Share | 1164 | $0.45 | 58,281.0000 | 162,797,684 | 1.96% | 0.00% |
| May 29, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Restricted Stock Unit | 2775 | $0.00 | 396,784.0000 | 162,797,684 | 0.69% | 0.00% |
| March 11, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Restricted Stock Unit | 29167 | $0.00 | 399,559.0000 | 162,797,684 | 6.80% | 0.02% |
| March 6, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Common Stock, Par Value $0.0001 Per Share | 13397 | $0.00 | 46,218.0000 | 162,797,684 | 40.82% | 0.01% |
| March 7, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | S | Common Stock, Par Value $0.0001 Per Share | 5645 | $0.42 | 40,573.0000 | 162,797,684 | 12.21% | 0.00% |
| March 11, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Common Stock, Par Value $0.0001 Per Share | 29167 | $0.00 | 69,740.0000 | 162,797,684 | 71.89% | 0.02% |
| March 12, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | S | Common Stock, Par Value $0.0001 Per Share | 13070 | $0.40 | 56,670.0000 | 162,797,684 | 18.74% | 0.01% |
| March 6, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Restricted Stock Unit | 13397 | $0.00 | 428,726.0000 | 162,797,684 | 3.03% | 0.01% |
| Feb. 20, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | S | Common Stock, Par Value $0.0001 Per Share | 8130 | $0.63 | 32,821.0000 | 162,797,684 | 19.85% | 0.00% |
| Feb. 19, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Common Stock, Par Value $0.0001 Per Share | 24316 | $0.00 | 40,951.0000 | 162,797,684 | 146.17% | 0.01% |
| Feb. 19, 2025 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | M | Restricted Stock Unit | 24316 | $0.00 | 442,123.0000 | 162,797,684 | 5.21% | 0.01% |
| Nov. 1, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Software Division | A | Restricted Stock Unit | 300000 | $0.00 | 466,439.0000 | 155,932,880 | 180.25% | 0.19% |
| May 28, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 1388 | $1.32 | 16,635.0000 | 155,932,880 | 7.70% | 0.00% |
| May 24, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Common Stock, Par Value $0.0001 Per Share | 2775 | $0.00 | 18,023.0000 | 155,932,880 | 18.20% | 0.00% |
| May 28, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | A | Restricted Stock Unit | 87500 | $0.00 | 166,439.0000 | 155,932,880 | 110.85% | 0.06% |
| May 24, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Restricted Stock Unit | 2775 | $0.00 | 78,939.0000 | 155,932,880 | 3.40% | 0.00% |
| March 19, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 26640 | $1.82 | 15,248.0000 | 155,932,880 | 63.60% | 0.02% |
| March 8, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 24899 | $2.19 | 41,888.0000 | 155,932,880 | 37.28% | 0.02% |
| March 5, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 3837 | $2.41 | 66,787.0000 | 155,932,880 | 5.43% | 0.00% |
| March 1, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | A | Common Stock, Par Value $0.0001 Per Share | 51539 | $0.00 | 76,348.0000 | 155,932,880 | 207.74% | 0.03% |
| March 1, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Common Stock, Par Value $0.0001 Per Share | 13398 | $0.00 | 24,809.0000 | 155,932,880 | 117.41% | 0.01% |
| March 1, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Restricted Stock Unit | 13398 | $0.00 | 81,714.0000 | 155,932,880 | 14.09% | 0.01% |
| March 4, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 5724 | $2.48 | 70,624.0000 | 155,932,880 | 7.50% | 0.00% |
| Feb. 20, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 6857 | $3.05 | 11,411.0000 | 155,932,880 | 37.54% | 0.00% |
| Feb. 15, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | A | Stock Option (Right to Buy) | 45024 | $0.00 | 45,024.0000 | 155,932,880 | 9999.99% | 0.03% |
| Feb. 15, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Restricted Stock Unit | 24315 | $0.00 | 95,112.0000 | 155,932,880 | 20.36% | 0.02% |
| Feb. 16, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 10602 | $3.17 | 18,268.0000 | 155,932,880 | 36.72% | 0.01% |
| Feb. 15, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Common Stock, Par Value $0.0001 Per Share | 24315 | $0.00 | 28,870.0000 | 155,932,880 | 533.81% | 0.02% |
| Feb. 14, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 4556 | $3.15 | 4,555.0000 | 155,932,880 | 50.01% | 0.00% |
| Jan. 3, 2024 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | S | Common Stock, Par Value $0.0001 Per Share | 5207 | $3.56 | 9,111.0000 | 155,932,880 | 36.37% | 0.00% |
| Dec. 31, 2023 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Restricted Stock Unit | 14318 | $0.00 | 119,427.0000 | 0 | 10.71% | 0.00% |
| Dec. 31, 2023 | STEM, INC. | $STEM | Tappin Matthew | President, Asset Management | M | Common Stock, Par Value $0.0001 Per Share | 14318 | $0.00 | 14,318.0000 | 0 | 9999.99% | 0.00% |