What Are the Core Differences Between PSK and PSK Holdings? Complete Analysis of the Spinoff Structure

Semiconductor equipment is segmented by process into front-end (cleaning, stripping, etc.) and back-end/advanced packaging (Descum, Reflow, etc.). In 2019, a spin-off separated these two business lines into distinct legal entities, requiring investors to distinguish between the two tickers: 319660 and 031980.

From the perspective of cross-border securities and the Gate Stocks Korea Stock Sector, 319660 corresponds to PSK Inc.'s publicly traded shares, while 031980 corresponds to those of PSK Holdings. When reviewing market data, financial reports, or news, always confirm the relevant ticker and legal entity name first, then compare their respective product lines and disclosure documents to avoid confusing the group's history with that of an individual listed entity.

What Is PSK Holdings?

PSK Holdings Inc. (피에스케이홀딩스, KRX 031980) is the surviving entity following the PSK Group's spin-off in April 2019. Before the spin-off, this entity operated under the name PSK (피에스케이). Upon completing the 인적분할 (spin-off) on April 1, 2019, its legal name changed to PSK Holdings, allowing it to retain the group's holding company functions while continuing the back-end process and advanced packaging equipment business.

PSK Holdings focuses on back-end/packaging equipment such as Descum, Reflow, and HDW, which are closely tied to HBM and 3D packaging demand, and also holds equity interests in other group companies. Headquartered in Hwaseong, South Korea, it is listed on the KRX under ticker 031980.

The table above summarizes PSK Holdings' identity as both a surviving entity and a back-end equipment provider. Ticker 031980 refers to PSK Holdings' publicly traded shares on the KRX. This is a different listed entity from the front-end equipment target 319660, and you must review KRX disclosures and each company's official website separately.

What Is PSK Inc.?

PSK Inc. (피에스케이, KOSDAQ 319660) is a newly established independent legal entity spun off from PSK Holdings on April 1, 2019, specializing in the R&D, manufacturing, and sales of front-end semiconductor process equipment. The company was independently listed on KOSDAQ on May 10, 2019, under the ticker 319660, and operates under the brand and domain PSK / pskinc.com.

PSK Inc.'s main products cover front-end equipment categories such as Dry Strip, Dry Cleaning, New Hard Mask Strip, and Bevel Etch, with the flagship Dry Strip platform being SUPRA. The company also extends its 3D packaging equipment capabilities through the SEMIgear brand, creating a product structure of "front-end process + packaging extension." Its headquarters are also located in Hwaseong, Gyeonggi Province, South Korea, with multiple overseas subsidiaries and branches serving global wafer fab customers.

319660 is the common PSK trading ticker on platforms like Gate Stocks Korea Stock Sector, corresponding to PSK Inc., not PSK Holdings. When investors encounter "PSK Korean stock" without further specification, it typically refers to the KOSDAQ target 319660.

How Did the 2019 Spin-Off Work?

On April 1, 2019, the original PSK Group executed an 인적분할 (personnel/business spin-off) under South Korean company law. The logic was to transfer the front-end process equipment business and related assets and personnel to the newly established PSK Inc., while the original listed entity continued to exist and was renamed PSK Holdings, retaining the back-end/advanced packaging equipment business and holding structure.

After the spin-off, the two entities independently prepare financial statements, independently comply with regulatory disclosure requirements, and have distinct equity structures. PSK Inc. was listed on KOSDAQ on May 10, 2019, gaining an independent financing platform; PSK Holdings continues to trade on the KRX under 031980. Both companies are headquartered in Hwaseong, reflecting geographic and industrial clustering, but this does not alter their legal independence or the difference in listing codes.

Figure 1. PSK Group spin-off structure: PSK Holdings (surviving entity, KRX 031980) and PSK Inc. (new entity, KOSDAQ 319660) separated in April 2019.

The spin-off took effect on April 1, 2019: the surviving entity is PSK Holdings (031980), and the new entity is PSK Inc. (319660), which listed on KOSDAQ on May 10, 2019. Both companies originated from the original PSK Group and share headquarters in Hwaseong. The spin-off separated the front-end and back-end/packaging businesses into different capital market entities, making it essential to distinguish "pre-spin-off group history" from "post-spin-off independent targets" along the timeline.

PSK vs. PSK Holdings: Key Differences at a Glance

The following table compares PSK Inc. and PSK Holdings across multiple dimensions for quick identification:

Figure 2. Side-by-side comparison: PSK Inc. (front-end, KOSDAQ 319660) vs PSK Holdings (backend/packaging, KRX 031980).

The comparison shows the greatest differences lie in the listing code and process segment division—not in whether a company "makes semiconductor equipment." Both companies operate in the semiconductor equipment space, but their product application scenarios, customer qualification paths, and revenue drivers are structurally distinct. Front-end equipment is more tightly linked to the wafer fab CapEx cycle, while back-end/packaging equipment is more closely tied to advanced packaging demand such as HBM and Chiplet.

How Can Investors Differentiate PSK from PSK Holdings?

Confirm the stock ticker and legal entity name: 319660 refers only to PSK Inc., and 031980 refers only to PSK Holdings. When news, research reports, or social platforms mention "PSK," check the context to see if the ticker or full legal name is indicated, avoiding confusion between the two companies' performance, orders, or risks.

Distinguish disclosure sources: The two companies file periodic reports and material events on KOSDAQ and KRX respectively. When reviewing financial reports, related-party transactions, or subsidiary structures, search using the corresponding ticker on public platforms like KRX KIND, rather than assuming a single disclosure covers the entire group.

Understand business boundaries, not geographic boundaries: A shared headquarters in Hwaseong does not imply business integration. After the spin-off, each company independently signs contracts and recognizes revenue. The group's historical achievements and customer relationships must also be understood along the timeline before and after the spin-off.

Cross-border trading context: On platforms such as Gate Stocks Korea Stock Sector, the page for 319660 points to PSK Inc.; to monitor PSK Holdings, search separately for 031980. Korean won pricing, trading rules, and exchange rate conversion apply equally to both targets, but liquidity and market capitalization may differ.

Pay attention to structural risk differences: Front-end equipment competition concentrates in niche segments like Dry Strip; back-end/packaging equipment is tied to advanced packaging process evolution and major customer CapEx pacing, requiring separate evaluation.

What Are the Common Misconceptions?

Misconception 1: PSK and PSK Holdings are the same stock. They are different legal entities, different tickers, and listed on different markets (KOSDAQ 319660 vs. KRX 031980). They are not interchangeable.

Misconception 2: After the spin-off, only one company makes semiconductor equipment. Both companies manufacture semiconductor equipment. The difference lies in the process segment and product type, not in whether one makes equipment and the other does not.

Misconception 3: Same headquarters means the group was not split. The Hwaseong address reflects industry clustering and historical ties. Since April 1, 2019, they have been two legally independent listed entities, each with its own disclosure and governance responsibilities.

Misconception 4: 319660 represents the entire PSK Group. 319660 represents only PSK Inc.'s publicly traded shares; PSK Holdings and its back-end/packaging business must be observed separately through 031980.

Misconception 5: Pre-spin-off history can be directly applied to a single target today. Milestones such as the 1997 KOSDAQ listing and overseas subsidiary establishments belong to the pre-spin-off group history. After the spin-off, the development paths of the two entities must be tracked separately.

Summary

PSK Inc. (KOSDAQ 319660) and PSK Holdings (KRX 031980) completed their spin-off on April 1, 2019. The former focuses on front-end process equipment (Dry Strip, SUPRA platform, etc.), while the latter, as the surviving entity, retains the holding function and focuses on back-end/advanced packaging equipment. Both are headquartered in Hwaseong, South Korea, but their listing tickers, disclosure entities, and business boundaries are independent. When reviewing the Gate Stocks Korea Stock Sector or KRX public information, investors must first confirm whether the reference is 319660 or 031980, then compare the respective product lines and financial reports to avoid confusing the two legal entities.

FAQ

Are PSK and PSK Holdings the same company?

No. After the spin-off on April 1, 2019, PSK Inc. (KOSDAQ 319660) and PSK Holdings (KRX 031980) became two independent legal entities, each independently listed and disclosing information. Both originated from the original PSK Group, but their stock tickers and business divisions differ.

What do 319660 and 031980 represent respectively?

319660 is the ticker for PSK Inc. on KOSDAQ, representing its front-end process equipment business. 031980 is the ticker for PSK Holdings on KRX, representing the surviving entity and its back-end/advanced packaging equipment business. The two tickers are not interchangeable.

How was the business divided in the 2019 spin-off?

The spin-off allocated the front-end process equipment business to the newly established PSK Inc., while the back-end/advanced packaging equipment and holding functions remained in the surviving entity renamed PSK Holdings. PSK Inc. was independently listed on KOSDAQ on May 10, 2019.

Why are both company headquarters in Hwaseong?

Hwaseong is a key semiconductor industry cluster in Gyeonggi Province, South Korea. The original PSK Group was based there before the spin-off. After the spin-off, the two entities operate independently but geographically continue to leverage the same industrial belt's facilities, talent, and supply chain resources. The same headquarters address does not indicate the group was not split.

Which PSK is listed on Gate Stocks Korea Stock Sector?

The 319660 displayed on Gate Stocks Korea Stock Sector corresponds to PSK Inc., the KOSDAQ front-end equipment target. PSK Holdings (031980) is a separate KRX target and must be reviewed through its corresponding ticker.

How should investors look up company information after the spin-off?

Search for the corresponding entity's disclosure documents on public platforms such as KRX KIND using the target ticker. Product and technical information for PSK Inc. is available at pskinc.com; information on PSK Holdings must be verified through its legal name and disclosure channels related to 031980. The financial reports, related-party transactions, and risk factors of the two companies should be read separately.