Insider · CIK 0001947998
Sk Inc.
Files at SES (SES AI Corp), NPWR (NET Power Inc.). First filing Oct 15, 2024, latest Jul 17, 2025.
In brief
Sk Inc. files SEC Form 4 as 10% owner at SES (SES AI Corp), and also at NPWR (NET Power Inc.). Since Oct 15, 2024, Sk Inc. has reported 0 open-market buys worth $0 and 18 open-market sells worth $11M, the latest filed on Jul 17, 2025.
A track record needs three past buys with six months of prices behind them; Sk Inc. has 0, so none is measured yet.
The newest scored trade: sold $6.5M of NPWR on Jul 15, 2025, filed Jul 17, 2025, scored 57 (moderate).
Where the trades landed
Last year at the 2 companies this insider has traded most, with each buy and sell on the bar it happened.
SES: SES AI Corp
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
NPWR: NET Power Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 57Moderate | NPWRsell NET Power Inc. | $6.5M 2,500,000 shares | -100% | +96% from low-78% from high | |
| 34Weak | SES AI Corp | $292k 726,460 shares | -2% | - | |
| 35Weak | SES AI Corp | $363k 917,857 shares | -3% | - | |
| 24Weak | SESsell SES AI Corp | $181k 415,508 shares | -1% | - | |
| 24Weak | SESsell SES AI Corp | $199k 416,120 shares | -1% | - | |
| 31Weak | SES AI Corp | $160k 550,000 shares | -2% | - | |
| 27Weak | SES AI Corp | $61k 170,248 shares | -0% | - | |
| 30Weak | SES AI Corp | $98k 257,220 shares | -1% | - | |
| 29Weak | SES AI Corp | $88k 204,461 shares | -1% | - | |
| 31Weak | SES AI Corp | $157k 347,794 shares | -1% | - | |
| 12Weak | SESsell SES AI Corp | $12k 21,450 shares | -0% | - | |
| 25Weak | SESsell SES AI Corp | $260k 452,982 shares | -1% | - | |
| 27Weak | SESsell SES AI Corp | $325k 540,703 shares | -1% | - | |
| 30Weak | SESsell SES AI Corp | $528k 788,290 shares | -2% | - | |
| 31Weak | SESsell SES AI Corp | $589k 900,000 shares | -2% | - | |
| 27Weak | SESsell SES AI Corp | $364k 610,500 shares | -2% | - | |
| 29Weak | SESsell SES AI Corp | $471k 764,898 shares | -2% | - | |
| 27Weak | SESsell SES AI Corp | $358k 600,000 shares | -1% | - |
Transactions
Every row this insider has filed, 36 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jul 30, 2025 | NPWR NET Power Inc. | JOther Class B Common Stockindirect: See Footnotes | -26,729,880 | - | - | 0 | Jul 31, 2025 |
| Jul 30, 2025 | NPWR NET Power Inc. | JOther Class A Units of NET Power Operations LLCderivativeindirect: See Footnotes | -26,729,880 | - | - | 0 | Jul 31, 2025 |
| Jul 15, 2025 | NPWR NET Power Inc. | SOpen-market sale Class A Common Stockindirect: By: Tillandsia | -2,500,000 | $2.61 | $6.5M | 0 | Jul 17, 2025 |
| Dec 17, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -326,460 | $0.38 | $124k | 32,243,210 | Dec 19, 2024 |
| Dec 18, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.42 | $168k | 31,843,210 | Dec 19, 2024 |
| Dec 13, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -417,857 | $0.39 | $163k | 33,069,670 | Dec 17, 2024 |
| Dec 16, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -500,000 | $0.40 | $200k | 32,569,670 | Dec 17, 2024 |
| Dec 11, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -300,000 | $0.44 | $132k | 33,603,035 | Dec 13, 2024 |
| Dec 12, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -115,508 | $0.42 | $49k | 33,487,527 | Dec 13, 2024 |
| Dec 9, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.48 | $192k | 33,919,155 | Dec 11, 2024 |
| Dec 10, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -16,120 | $0.45 | $7,254 | 33,903,035 | Dec 11, 2024 |
| Nov 13, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -250,000 | $0.28 | $70k | 34,619,155 | Nov 15, 2024 |
| Nov 14, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -300,000 | $0.30 | $90k | 34,319,155 | Nov 15, 2024 |
| Nov 11, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -170,248 | $0.36 | $61k | 34,869,155 | Nov 13, 2024 |
| Nov 7, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -154,105 | $0.39 | $60k | 35,142,518 | Nov 12, 2024 |
| Nov 8, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -103,115 | $0.37 | $38k | 35,039,403 | Nov 12, 2024 |
| Nov 5, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -200,000 | $0.43 | $86k | 35,301,084 | Nov 7, 2024 |
| Nov 6, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -4,461 | $0.42 | $1,874 | 35,296,623 | Nov 7, 2024 |
| Nov 1, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -147,794 | $0.45 | $67k | 35,701,084 | Nov 5, 2024 |
| Nov 4, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -200,000 | $0.45 | $90k | 35,501,084 | Nov 5, 2024 |
| Oct 30, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -19,250 | $0.56 | $11k | 35,851,078 | Nov 1, 2024 |
| Oct 31, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -2,200 | $0.50 | $1,100 | 35,848,878 | Nov 1, 2024 |
| Oct 28, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -217,655 | $0.58 | $126k | 36,105,655 | Oct 30, 2024 |
| Oct 29, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -235,327 | $0.57 | $134k | 35,870,328 | Oct 30, 2024 |
| Oct 24, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -290,703 | $0.62 | $180k | 36,573,310 | Oct 28, 2024 |
| Oct 25, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -250,000 | $0.58 | $145k | 36,323,310 | Oct 28, 2024 |
| Oct 22, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -437,785 | $0.67 | $293k | 37,214,518 | Oct 24, 2024 |
| Oct 23, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -350,505 | $0.67 | $235k | 36,864,013 | Oct 24, 2024 |
| Oct 18, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.61 | $244k | 38,152,803 | Oct 22, 2024 |
| Oct 21, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -500,000 | $0.69 | $345k | 37,652,303 | Oct 22, 2024 |
| Oct 16, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.60 | $240k | 38,762,803 | Oct 18, 2024 |
| Oct 17, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -210,500 | $0.59 | $124k | 38,552,303 | Oct 18, 2024 |
| Oct 14, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.62 | $248k | 39,527,701 | Oct 16, 2024 |
| Oct 15, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -364,898 | $0.61 | $223k | 39,162,803 | Oct 16, 2024 |
| Oct 10, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -200,000 | $0.57 | $114k | 40,327,701 | Oct 15, 2024 |
| Oct 11, 2024 | SES SES AI Corp | SOpen-market sale Class A Common Stock | -400,000 | $0.61 | $244k | 39,927,701 | Oct 15, 2024 |
Questions about Sk Inc.
Answered from the filings on this page, as of the latest one.
Is Sk Inc. buying or selling?
Not in the last 12 months. Sk Inc.'s latest open-market trade on SEC Form 4 was sold $6.5M of NPWR on Jul 15, 2025.
How did Sk Inc.'s past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Sk Inc. has 0.
Where does Sk Inc. file Form 4?
Sk Inc. has filed Form 4 at SES (SES AI Corp); NPWR (NET Power Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.