Summary
Updated Aug 31, 2026
SK INC. is 10% Owner of Net Power Inc. (NPWR). 23 SEC Form 4 filings on record going back to 2024, most recently on 30 July 2025. Most recent open-market trade: sold $6.53M of NPWR on 15 July 2025. Lifetime open-market sales: $11.94M.
Recent Transactions
20Every recent SEC Form 4 transaction SK INC. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for SK INC. go back to 2024: 23 primary Form 4 filings, an average of 7.7 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies SK INC. files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- 8 Rivers Capital, LLC - $19.31M of NPWR open-market activity in the last 12 months
- NPEH, LLC - $19.31M of NPWR open-market activity in the last 12 months
- Hong Gan - $1.11M of SES open-market activity in the last 12 months
- Cynda Beauchamp - $73K of NPWR open-market activity in the last 12 months
- Kyle Pilkington - $60K of SES open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
What is SK INC.?
SK INC. is a corporate entity, tracked as 10% Owner of Net Power Inc. (NPWR). InsiderAlpha holds 23 primary Form 4 filings for it, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did SK INC. last file a Form 4?
The most recent primary Form 4 on record is dated 30 July 2025, one of 23 filings going back to 2024.
Has SK INC. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 42 open-market sales ($11.94M) across all tracked filings.
Where can I see all of SK INC.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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