Supermicro Appoints Mark Long as CFO, Succeeding David Weigand

Super Micro Computer, Inc. (Supermicro) announced on 15 October 2026 that Mark Long has been appointed Senior Vice President and Chief Financial Officer, according to its release. Long succeeds David Weigand, who ceased serving as CFO, according to a Stock Titan summary of the company's Form 8-K. That summary says the Board made the appointment on 14 October 2026.

Who is Mark Long?

Mark Long previously served as Chief Financial Officer and Chief Strategy Officer of Western Digital, according to the company's release. The Form 8-K summary adds that he was Chief Financial Officer of Western Digital Corporation from 2016 to 2019, per Stock Titan.

The release describes Long as a seasoned finance executive with decades of experience across the technology sector, spanning corporate finance, strategy, mergers and acquisitions, and capital allocation. It also says he was a co-founder and Partner of Prime Impact Capital, a technology-focused investment firm, and Senior Vice President of Strategy and Corporate Development at Hitachi Global Storage Technologies. The 8-K summary says he has been a principal of Prime Impact Capital since 2019; neither source dates the Hitachi role.

What happens to David Weigand?

David Weigand no longer serves as CFO, according to the Form 8-K summary. The company's release says he will assist in the transition and shift his focus to helping optimize and accelerate the business, per the release. The release does not give a new title for Weigand.

When does the appointment take effect?

The Board made the appointment on 14 October 2026, according to the Form 8-K summary. The company's release, dated 15 October 2026, describes the appointment as effective immediately, per the release. Both describe the change as effective immediately, and the 8-K dates the Board's action to 14 October 2026, so readers should use the filing text as the reference.

Who will Mark Long report to?

Mark Long reports directly to Chief Executive Officer Charles Liang, the company's release says. Investing.com reported the same reporting line on 15 October 2026.

The release identifies Charles Liang as Supermicro's Founder, President, and CEO. The release places the CFO role under him directly, which is the reporting line both accounts share. Readers comparing the two reports should note that neither one describes a second reporting line or any change to it.

What is Mark Long's compensation as Supermicro CFO?

The Form 8-K summary lists an annual base salary of $725,000 as of 15 October 2026, along with a sign-on bonus and an equity award. The equity award is expected, not yet granted, and depends on approval by the Compensation Committee of the board, according to Stock Titan.

Separate from the expected award, Long's equity compensation also includes an expected option to purchase 150,000 shares of the company's common stock, according to Stock Titan. Both the restricted stock units and the option vest over four years, contingent on continued employment and applicable plan terms. No yearly vesting schedule is reported, so the table below lists only items with a stated amount.

How was the CFO role filled?

The release says Supermicro conducted an extensive search process to identify and secure a candidate with the necessary skills and experience. It gives no detail on the candidates considered, the search timeline, or any outside firm involved. The release names Long as the successor to David Weigand.

How can you verify a CFO change in SEC filings?

Public companies report certain executive changes in a Form 8-K filed with the SEC. For this appointment, the company's release and a Stock Titan summary of the 8-K both report the core facts: the name, the title and the predecessor. For the exact wording on dates and pay, check the filing on SEC EDGAR. For a step-by-step method, see how to verify an executive appointment in an 8-K and how to check a CFO change in SEC filings.

What's still unclear?

• Start date. The 8-K summary dates the Board's appointment to 14 October 2026. The company's release, dated 15 October 2026, says "effective immediately," and the 8-K summary uses the same wording.
• Filing source. The filing details come from Stock Titan's summary of the Form 8-K. This article does not quote the filing from SEC EDGAR, so the exact wording should be checked there.
• Equity award. The 120,000 restricted stock units are expected, subject to Compensation Committee approval. No grant is confirmed in the release or the 8-K summary.
• Reason for the change. Neither the release nor the 8-K summary gives a reason for the change.
• Dates for prior roles. The release does not state years for Long's Western Digital roles. The Stock Titan summary dates his CFO role at Western Digital Corporation to 2016 to 2019. The 8-K summary dates his Prime Impact Capital principal role to 2019; no dates are given for his Hitachi Global Storage Technologies role.
• Weakest point. The appointment rests on one company release and one filing summary. The only second outlet is Investing.com, which reports the reporting line.