Mark William Triplett
Insider
First SEC filing: May 28, 2021 · Latest: May 28, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 12, 2022 | STEM | M | 39,843 | $6.81 | $271,331 | 131,479 Direct | +43.48% | Acquired | -96.9% (price as of 2026-10-02) |
| April 12, 2022 | STEM | F | 33,545 | $9.92 | $332,766 | 97,934 Direct | -25.51% | Disposed | -97.9% (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 1,048 | $6.81 | $7,137 | 98,982 Direct | +1.07% | Acquired | -96.9% (price as of 2026-10-02) |
| April 12, 2022 | STEM | F | 883 | $9.92 | $8,759 | 98,099 Direct | -0.89% | Disposed | -97.9% (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 235,663 | $2.27 | $534,955 | 333,762 Direct | +240.23% | Acquired | -90.6% (price as of 2026-10-02) |
| April 12, 2022 | STEM | F | 144,032 | $9.92 | $1,428,797 | 189,730 Direct | -43.15% | Disposed | -97.9% (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 174,624 | $2.27 | $396,396 | 364,354 Direct | +92.04% | Acquired | -90.6% (price as of 2026-10-02) |
| April 12, 2022 | STEM | F | 40,408 | $9.81 | $396,402 | 323,946 Direct | -11.09% | Disposed | -97.8% (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 39,843 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 1,048 | · | · | 3,147 Direct | -24.98% | Disposed | (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 235,663 | · | · | 174,624 Direct | -57.44% | Disposed | (price as of 2026-10-02) |
| April 12, 2022 | STEM | M | 174,624 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 15, 2022 | STEM | M | 174,000 | $2.27 | $394,980 | 184,801 Direct | +1610.96% | Acquired | -90.6% (price as of 2026-10-02) |
| March 15, 2022 | STEM | F | 93,165 | $7.96 | $741,593 | 91,636 Direct | -50.41% | Disposed | -97.3% (price as of 2026-10-02) |
| March 15, 2022 | STEM | M | 174,000 | $7.96 | $1,385,040 | 558,393 Direct | -23.76% | Disposed | -97.3% (price as of 2026-10-02) |
| March 1, 2022 | STEM | A | 104,668 | · | · | 732,993 Direct | +16.66% | Acquired | (price as of 2026-10-02) |
| March 1, 2022 | STEM | A | 66,988 | · | · | 159,612 Direct | +72.32% | Acquired | (price as of 2026-10-02) |
| Jan. 31, 2022 | STEM | S 10b5-1 | 5,000 | $12.11 | $60,550 | 10,801 Direct | -31.64% | Disposed | -98.2% (price as of 2026-10-02) |
| Jan. 18, 2022 | STEM | S 10b5-1 | 5,000 | $14.27 | $71,350 | 15,801 Direct | -24.04% | Disposed | -98.5% (price as of 2026-10-02) |
| Jan. 3, 2022 | STEM | S 10b5-1 | 5,000 | $19.22 | $96,100 | 20,801 Direct | -19.38% | Disposed | -98.9% (price as of 2026-10-02) |
| Dec. 20, 2021 | STEM | S 10b5-1 | 5,000 | $18.16 | $90,800 | 25,801 Direct | -16.23% | Disposed | -98.8% (price as of 2026-10-02) |
| Dec. 6, 2021 | STEM | S 10b5-1 | 940 | $17.45 | $16,403 | 34,861 Direct | -2.63% | Disposed | -98.8% (price as of 2026-10-02) |
| Dec. 6, 2021 | STEM | S 10b5-1 | 3,960 | $18.62 | $73,735 | 30,901 Direct | -11.36% | Disposed | -98.9% (price as of 2026-10-02) |
| Dec. 6, 2021 | STEM | S 10b5-1 | 100 | $19.08 | $1,908 | 30,801 Direct | -0.32% | Disposed | -98.9% (price as of 2026-10-02) |
| Nov. 22, 2021 | STEM | S 10b5-1 | 4,500 | $22.86 | $102,870 | 36,301 Direct | -11.03% | Disposed | -99.1% (price as of 2026-10-02) |
| Nov. 22, 2021 | STEM | S 10b5-1 | 500 | $23.37 | $11,685 | 35,801 Direct | -1.38% | Disposed | -99.1% (price as of 2026-10-02) |
| Nov. 8, 2021 | STEM | S 10b5-1 | 5,000 | $24.94 | $124,700 | 40,801 Direct | -10.92% | Disposed | -99.1% (price as of 2026-10-02) |
| Oct. 28, 2021 | STEM | S 10b5-1 | 3,900 | $23.15 | $90,285 | 46,901 Direct | -7.68% | Disposed | -99.1% (price as of 2026-10-02) |
| Oct. 28, 2021 | STEM | S 10b5-1 | 800 | $24.14 | $19,312 | 46,101 Direct | -1.71% | Disposed | -99.1% (price as of 2026-10-02) |
| Oct. 28, 2021 | STEM | S 10b5-1 | 200 | $25.42 | $5,084 | 45,901 Direct | -0.43% | Disposed | -99.2% (price as of 2026-10-02) |
| Oct. 28, 2021 | STEM | S 10b5-1 | 100 | $26.75 | $2,675 | 45,801 Direct | -0.22% | Disposed | -99.2% (price as of 2026-10-02) |
| Aug. 23, 2021 | STEM | M | 100,000 | $2.27 | $227,000 | 100,000 Direct | · | Acquired | -90.6% (price as of 2026-10-02) |
| Aug. 23, 2021 | STEM | F | 49,199 | $23.70 | $1,166,016 | 50,801 Direct | -49.20% | Disposed | -99.1% (price as of 2026-10-02) |
| Aug. 23, 2021 | STEM | M | 100,000 | $23.70 | $2,370,000 | 628,325 Direct | -13.73% | Disposed | -99.1% (price as of 2026-10-02) |
| July 2, 2021 | STEM | A | 65,000 | · | · | 65,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 2, 2021 | STEM | A | 27,624 | · | · | 92,624 Direct | +42.50% | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| April 12, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $6.81 | Dec. 3, 2030 | 39,843 | Disposed |
| April 12, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $6.81 | Dec. 3, 2030 | 1,048 | Disposed |
| April 12, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $2.27 | Jan. 30, 2029 | 235,663 | Disposed |
| April 12, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $2.27 | Jan. 30, 2029 | 174,624 | Disposed |
| March 15, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $2.27 | Jan. 30, 2029 | 174,000 | Disposed |
| March 1, 2022 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $9.33 | Feb. 29, 2032 | 104,668 | Acquired |
| March 1, 2022 | STEM | Restricted Stock Unit | Common Stock, Par Value $0.0001 Per Share | · | · | 66,988 | Acquired |
| Aug. 23, 2021 | STEM | Stock Option (Right to Buy) | Common Stock, Par Value $0.0001 Per Share | $2.27 | Jan. 30, 2029 | 100,000 | Disposed |
| July 2, 2021 | STEM | Restricted Stock Unit | Common Stock, Par Value $0.0001 Per Share | · | · | 65,000 | Acquired |
| July 2, 2021 | STEM | Restricted Stock Unit | Common Stock, Par Value $0.0001 Per Share | · | · | 27,624 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.