Sumitomo Life Insurance Boosts Western Digital Stake by 217%

Institutional investor now owns over $1.77 million in WDC shares

Published on Feb. 27, 2026

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Sumitomo Life Insurance Co. significantly increased its stake in Western Digital Corporation (NASDAQ:WDC) by 217.1% in the 3rd quarter, according to a recent SEC filing. The institutional investor now owns 14,731 shares of the data storage provider's stock, valued at $1.77 million.

Why it matters

This investment by a major institutional investor like Sumitomo Life Insurance highlights growing confidence in Western Digital's business and future prospects. As a leading global data storage company, Western Digital's performance is seen as an indicator of broader technology and enterprise IT trends.

The details

According to the 13F filing, Sumitomo Life Insurance acquired an additional 10,086 shares of Western Digital in the 3rd quarter, bringing its total position to 14,731 shares. This represents a 217.1% increase from the prior quarter. Western Digital's stock has seen strong performance recently, with shares up over 70% in the past year as the company benefits from rising demand for data storage solutions.

  • Sumitomo Life Insurance increased its Western Digital stake in the 3rd quarter of 2025.

The players

Sumitomo Life Insurance Co.

A major Japanese life insurance company that invests in a variety of global equities and assets.

Western Digital Corporation

A leading global data storage company that designs, manufactures and sells hard disk drives (HDDs), solid-state drives (SSDs), and other data storage solutions.

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The takeaway

Sumitomo Life Insurance's substantial investment in Western Digital underscores the data storage company's strong market position and growth potential as demand for its products continues to rise globally. This institutional backing could signal further upside for Western Digital's stock in the months ahead.