SK INC.
CIK 1947998 · View on SEC EDGAR ↗
First SEC filing: Sept. 28, 2022 · Latest: Aug. 1, 2025
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- Biography Career background and public profile, where available.
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
SK Inc. is the holding company of South Korea's SK Group and is headquartered in Seoul, South Korea. The company is divided into Investment Division and Business Division. The Investment Division operates as a holding company engaged in petroleum, telecommunications, wholesale and retail, chemicals, semiconductors, biotechnology, and other industries. It holds the SK Group's major subsidiaries, including SK Innovation, SK Telecom, SKC, SK Networks, SK Materials, and SK Biopharmaceutical. The Business Division, SK Inc. C&C, provides system integration, software design and development, information processing, and consulting services.
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SK Inc. (Korean: 에스케이 주식회사) is the holding company of South Korea's SK Group and is headquartered in Seoul, South Korea. The company is divided into Investment Division and Business Division. The Investment Division operates as a holding company engaged in petroleum, telecommunications, wholesale and retail, chemicals, semiconductors, biotechnology, and other industries. It holds the SK Group's major subsidiaries, including SK Innovation, SK Telecom, SKC, SK Networks, SK Materials, and SK Biopharmaceutical. The Business Division, SK Inc. C&C, provides system integration, software design and development, information processing, and consulting services.
## History
In 1998, the company began providing services to SK Group affiliates. SK Holdings was established when SK Group decided to reorganize South Korea's biggest refiner SK Corporation into a holding company structure after a high-profile battle with Dubai-based fund Sovereign Asset Management in 2003. Although Sovereign failed to oust fraud-convicted chairman Chey Tae-won, SK sought to increase transparency and corporate governance to prevent further pressures from activist shareholders. In 2007, SK Corporation was split into two entities, with SK Energy inheriting the core business and SK Holdings serving as a holding firm with stakes in various affiliates of the SK Group conglomerate.
Despite the reorganization, consistent concerns had been raised over the unstable structure of corporate governance. Although SK Holdings was a holding company, SK's information technology service provider SK C&C controlled the group through its 31.8 percent stake in SK Holdings. Accordingly, SK merged SK Holdings and SK C&C to streamline its management structure in 2015. The merger between two companies enabled group chairman Chey Tae-won and his related parties to hold more than a 30% stake in the new SK Holdings. It solidified their ownership compared to the pre-merger when Chey's stake in ex-SK Holdings was only 0.02 percent.
In 2021, SK Holdings changed its name to SK Inc.
Source: Wikipedia, CC BY-SA 4.0 · View on Wikipedia ↗
Insider at
Insider transactions
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 15, 2025 | NPWR | S | 2,500,000 | $2.61 | $6,525,000 | 0 Indirect | -100.00% | Disposed | -36.2% (price as of 2026-08-20) |
| Dec. 18, 2024 | SES | S | 400,000 | $0.42 | $168,000 | 31,843,210 Direct | -1.24% | Disposed | 27.0% (price as of 2026-08-20) |
| Dec. 17, 2024 | SES | S | 326,460 | $0.38 | $124,055 | 32,243,210 Direct | -1.00% | Disposed | 40.4% (price as of 2026-08-20) |
| Dec. 16, 2024 | SES | S | 500,000 | $0.40 | $200,000 | 32,569,670 Direct | -1.51% | Disposed | 33.3% (price as of 2026-08-20) |
| Dec. 13, 2024 | SES | S | 417,857 | $0.39 | $162,964 | 33,069,670 Direct | -1.25% | Disposed | 36.8% (price as of 2026-08-20) |
| Dec. 12, 2024 | SES | S | 115,508 | $0.42 | $48,513 | 33,487,527 Direct | -0.34% | Disposed | 27.0% (price as of 2026-08-20) |
| Dec. 11, 2024 | SES | S | 300,000 | $0.44 | $132,000 | 33,603,035 Direct | -0.88% | Disposed | 21.2% (price as of 2026-08-20) |
| Dec. 10, 2024 | SES | S | 16,120 | $0.45 | $7,254 | 33,903,035 Direct | -0.05% | Disposed | 18.5% (price as of 2026-08-20) |
| Dec. 9, 2024 | SES | S | 400,000 | $0.48 | $192,000 | 33,919,155 Direct | -1.17% | Disposed | 11.1% (price as of 2026-08-20) |
| Nov. 14, 2024 | SES | S | 300,000 | $0.30 | $90,000 | 34,319,155 Direct | -0.87% | Disposed | 77.8% (price as of 2026-08-20) |
| Nov. 13, 2024 | SES | S | 250,000 | $0.28 | $70,000 | 34,619,155 Direct | -0.72% | Disposed | 90.5% (price as of 2026-08-20) |
| Nov. 11, 2024 | SES | S | 170,248 | $0.36 | $61,289 | 34,869,155 Direct | -0.49% | Disposed | 48.2% (price as of 2026-08-20) |
| Nov. 8, 2024 | SES | S | 103,115 | $0.37 | $38,153 | 35,039,403 Direct | -0.29% | Disposed | 44.2% (price as of 2026-08-20) |
| Nov. 7, 2024 | SES | S | 154,105 | $0.39 | $60,101 | 35,142,518 Direct | -0.44% | Disposed | 36.8% (price as of 2026-08-20) |
| Nov. 6, 2024 | SES | S | 4,461 | $0.42 | $1,874 | 35,296,623 Direct | -0.01% | Disposed | 27.0% (price as of 2026-08-20) |
| Nov. 5, 2024 | SES | S | 200,000 | $0.43 | $86,000 | 35,301,084 Direct | -0.56% | Disposed | 24.0% (price as of 2026-08-20) |
| Nov. 4, 2024 | SES | S | 200,000 | $0.45 | $90,000 | 35,501,084 Direct | -0.56% | Disposed | 18.5% (price as of 2026-08-20) |
| Nov. 1, 2024 | SES | S | 147,794 | $0.45 | $66,507 | 35,701,084 Direct | -0.41% | Disposed | 18.5% (price as of 2026-08-20) |
| Oct. 31, 2024 | SES | S | 2,200 | $0.50 | $1,100 | 35,848,878 Direct | -0.01% | Disposed | 6.7% (price as of 2026-08-20) |
| Oct. 30, 2024 | SES | S | 19,250 | $0.56 | $10,780 | 35,851,078 Direct | -0.05% | Disposed | -4.8% (price as of 2026-08-20) |
| Oct. 29, 2024 | SES | S | 235,327 | $0.57 | $134,136 | 35,870,328 Direct | -0.65% | Disposed | -6.4% (price as of 2026-08-20) |
| Oct. 28, 2024 | SES | S | 217,655 | $0.58 | $126,240 | 36,105,655 Direct | -0.60% | Disposed | -8.0% (price as of 2026-08-20) |
| Oct. 25, 2024 | SES | S | 250,000 | $0.58 | $145,000 | 36,323,310 Direct | -0.68% | Disposed | -8.0% (price as of 2026-08-20) |
| Oct. 24, 2024 | SES | S | 290,703 | $0.62 | $180,236 | 36,573,310 Direct | -0.79% | Disposed | -14.0% (price as of 2026-08-20) |
| Oct. 23, 2024 | SES | S | 350,505 | $0.67 | $234,838 | 36,864,013 Direct | -0.94% | Disposed | -20.4% (price as of 2026-08-20) |
| Oct. 22, 2024 | SES | S | 437,785 | $0.67 | $293,316 | 37,214,518 Direct | -1.16% | Disposed | -20.4% (price as of 2026-08-20) |
| Oct. 21, 2024 | SES | S | 500,000 | $0.69 | $345,000 | 37,652,303 Direct | -1.31% | Disposed | -22.7% (price as of 2026-08-20) |
| Oct. 18, 2024 | SES | S | 400,000 | $0.61 | $244,000 | 38,152,803 Direct | -1.04% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 17, 2024 | SES | S | 210,500 | $0.59 | $124,195 | 38,552,303 Direct | -0.54% | Disposed | -9.6% (price as of 2026-08-20) |
| Oct. 16, 2024 | SES | S | 400,000 | $0.60 | $240,000 | 38,762,803 Direct | -1.02% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 15, 2024 | SES | S | 364,898 | $0.61 | $222,588 | 39,162,803 Direct | -0.92% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 14, 2024 | SES | S | 400,000 | $0.62 | $248,000 | 39,527,701 Direct | -1.00% | Disposed | -14.0% (price as of 2026-08-20) |
| Oct. 11, 2024 | SES | S | 400,000 | $0.61 | $244,000 | 39,927,701 Direct | -0.99% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 10, 2024 | SES | S | 200,000 | $0.57 | $114,000 | 40,327,701 Direct | -0.49% | Disposed | -6.4% (price as of 2026-08-20) |
| Oct. 9, 2024 | SES | S | 2,481 | $0.60 | $1,489 | 40,527,701 Direct | -0.01% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 8, 2024 | SES | S | 71,256 | $0.60 | $42,754 | 40,530,182 Direct | -0.18% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 7, 2024 | SES | S | 82,429 | $0.60 | $49,457 | 40,601,438 Direct | -0.20% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 4, 2024 | SES | S | 100,000 | $0.61 | $61,000 | 40,683,867 Direct | -0.25% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 3, 2024 | SES | S | 587 | $0.60 | $352 | 40,783,867 Direct | 0.00% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 2, 2024 | SES | S | 243,951 | $0.60 | $146,371 | 40,784,454 Direct | -0.59% | Disposed | -11.1% (price as of 2026-08-20) |
| Oct. 1, 2024 | SES | S | 908,178 | $0.61 | $553,989 | 41,028,405 Direct | -2.17% | Disposed | -12.6% (price as of 2026-08-20) |
| Sept. 30, 2024 | SES | S | 71,176 | $0.70 | $49,823 | 41,936,583 Direct | -0.17% | Disposed | -23.8% (price as of 2026-08-20) |
| May 23, 2024 | NPWR | S | 2,500,000 | $10.04 | $25,100,000 | 2,500,000 Indirect | -50.00% | Disposed | -83.4% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| July 30, 2025 | NPWR | Class A Units of NET Power Operations LLC | Class A Common Stock (26,729,880) | — | — | 26,729,880 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 28, 2022 | SES | Class A Common Stock, par value $0.0001 | 42,007,759 | Direct |