SK Hynix Unit Solidigm Races Toward US IPO: Why Are Shareholders Worried About Dual Listing?

TradingKey - SK Hynix (SKHY)'s enterprise storage subsidiary, Solidigm, is preparing for a U.S. IPO, but the listing plan has raised concerns among parent company shareholders over equity dilution and valuation discounts.

South Korean financial regulators stated on October 19 that Solidigm's listing involves dual-listing restriction issues, and how to protect the interests of existing SK Hynix shareholders has become a key controversy in this IPO.

According to Reuters on September 25, Solidigm is considering a U.S. IPO as early as 2027, with market expectations that its valuation could reach up to $150 billion and fundraising could reach $15 billion. However, SK Hynix stated that the relevant plan has not yet been finalized.

What Is Solidigm? Why Is It Considering a US IPO?

SK Hynix announced in 2020 that it would acquire Intel's (INTC) NAND flash memory and solid-state drive (SSD) business, establishing Solidigm in 2021 to take over the related business. Solidigm primarily supplies enterprise SSDs for servers, cloud computing, and data centers.

According to South Korea's Herald Business, Solidigm's revenue in the first half of 2026 reached approximately 12.25 trillion won (about $9.19 billion), with a net profit of around 5.84 trillion won, representing a significant improvement in profitability compared with the same period last year.

Reuters previously reported that the company is considering building a NAND flash memory plant in the United States, with Upstate New York being one of the potential sites.

A US IPO is expected to provide Solidigm with an independent financing channel to fund its capacity expansion and technological R&D. However, the timing of the listing, offering size, and use of proceeds have not yet been finalized.

Whether the IPO can enhance business value still depends on the return on investment following the fundraising and the impact of the listing plan on the equity of SK Hynix's existing shareholders.

Why Dual Listing Raises Shareholder Concerns

Solidigm's equity ownership chain involves SK Inc., SK Square, SK Hynix, US intermediate holding company AI Company, and Solidigm.

Among them, SK Inc., SK Square, and SK Hynix are all listed entities. If Solidigm completes a US IPO, the number of listed entities within the group will further increase, raising market concerns over shareholder equity and parent company valuation.

The controversy centers primarily on two aspects.

First, if Solidigm brings in outside investors by issuing new shares, SK Hynix's indirect economic interest could be diluted. Solidigm's current earnings belong to SK Hynix; following the listing, outside shareholders will share in profits according to their ownership stakes. However, the actual impact will depend on the offering structure and proportion.

Second, a standalone listing for Solidigm could impact SK Hynix's valuation. The market worries that part of Solidigm's business value might be separated from the parent company's valuation after an independent listing, while a multi-tiered ownership structure could also increase valuation discount pressure on the parent company. However, this does not necessarily mean that the value of SK Hynix's stake will decline.

Lee Chan-jin, governor of South Korea's Financial Supervisory Service (FSS), stated at a National Assembly hearing on October 19 that both the FSS and the Financial Services Commission (FSC) believe Solidigm's US listing involves dual-listing restrictions.

However, whether an overseas listing requires complying with specific procedures such as domestic securities registration in South Korea remains to be further clarified.

Will Solidigm IPO Drag Down SKHY Stock Price?

On October 19 Eastern Time, SK Hynix's US shares closed up 4.67% at $142.87. Meanwhile, in overnight South Korean stock trading, its shares fell over 7% at one point. As of press time, SK Hynix's South Korean shares were down 3.84% at 1.228 million won.

[Source: TradingView]

Solidigm's potential US IPO could fund its business expansion, but it has also raised market concerns over the dilution of SK Hynix's shareholder equity and a valuation discount for the parent company.

If Solidigm secures funding through an IPO, it could provide financial support for its US NAND flash manufacturing layout and technological R&D. However, constructing new factories requires substantial capital investment, and whether the additional capacity can translate into profits remains dependent on market demand, construction progress, and production costs.

Changes in equity structure present another risk. If Solidigm brings in external investors by issuing new shares, SK Hynix's economic interest could be diluted. If the profit growth generated by the fundraising is insufficient to offset this change, potential returns for the parent company's shareholders could be impacted.

In addition, if the market downgrades the valuation of SK Hynix's equity stake in Solidigm, it could also add pressure on its stock price.

Going forward, investors should focus on four key areas: Solidigm's final valuation, offering structure, and offering ratio; SK Hynix's post-listing shareholding percentage and economic interest; the use of IPO proceeds, progress of US factory construction, and profit contribution from new capacity; as well as official feedback from South Korean regulators and shareholder protection measures.

The impact of Solidigm's IPO on SK Hynix's stock price ultimately depends on the economic interest retained by the parent company after listing, and whether the financing can deliver sufficient additional profits.