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Pioneer Power Solutions

PPSI on Nasdaq. Market value $34m.

Watch this stockFree. We tell you when something changes.

Should I look at this?

Look carefully before going further

Why it could be worth it

Nothing stands out yet.

What to watch out for

Read the warning sign in its own filings

This is not advice.

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Who owns it

None of the long-term investors we follow own it. 35 funds in all.

Jun '25
Dec '25
Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

No one has reported a stake above 5% since December 2024.

From Schedule 13D and 13G filings: anyone owning more than 5% must file one.

What insiders did

In the last 12 months, 1 insider bought $33,900 of shares on the open market.

  • MAZUREK NATHAN
    Chief Executive Officer, Director
    Bought
    Date
    18 November 2025
    Shares
    10,000
    Price
    $3.39
    Value
    $33,900

From Form 4 filings: insiders must report trades in their own company's shares within two days.

Warning signs in its filings

Problems the company itself reported to the SEC, in its own words.

1 serious warning sign in Pioneer Power Solutions’ filings.

We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.

We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 8 Apr 2026, plus the 10-Q filed 14 Aug 2026 and 3 later 8-Ks.

  • Weak checks on its own accounts

    Serious

    The company said its checks on its own accounts did not work at the end of its latest quarter. Mistakes could slip into the numbers.

    “Based on this evaluation, and as a result of the material weaknesses described below, our CEO and CFO have concluded that our disclosure controls and procedures were not effective as of June 30, 2026.”
    Show the full paragraph
    Our management, with the participation of our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), evaluated the effectiveness of our disclosure controls and procedures as defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of June 30, 2026. Our disclosure controls and procedures are designed to provide reasonable assurance that information we are required to disclose in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our CEO and CFO, as appropriate to allow timely decisions regarding required disclosures, and is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms. Based on this evaluation, and as a result of the material weaknesses described below, our CEO and CFO have concluded that our disclosure controls and procedures were not effective as of June 30, 2026. In light of this determination, our management has performed additional analyses, reconciliations, and other post-closing procedures and has concluded that, notwithstanding the material weaknesses in our internal control over financial reporting, the unaudited condensed interim consolidated financial statements for the periods covered by and included in this Quarterly Report on Form 10-Q fairly state, in all material respects, our financial position, results of operations and cash flows for the periods presented in conformity with U.S. GAAP.

    From the 10-Q filed 14 August 2026, Part I, Item 4. Controls and Procedures. Read it in the filing

  • Changed auditor

    Worth knowing

    The company changed its auditor (the firm that checks its books) in the last two years.

    “The audit committee of the Company (the “Audit Committee”) approved the dismissal of Marcum LLP (“Marcum”) as the Company’s independent registered public accounting firm, effective as of November 14, 2024.”

    From an 8-K filed 20 November 2024: Change of auditor. Read it in the filing

A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.

The deep dive

Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.

  • What the business is worth, as a range, and the margin of safety at today’s price
  • Prices to start buying, buy, and buy hard
  • The three things that would make this a mistake
  • Every number footnoted to the filing it came from
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What a finished deep dive looks like

Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.