Power Solutions International

PSIX on Nasdaq. Power Solutions International sells engines and power systems to equipment makers and end users. Market value $1.0bn.

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Price checks use the past 12 months to June 2026. Quality checks use five annual reports, the latest for the year to December 2025.

Should I look at this?

Worth a closer look

Read what could go wrong

This is not advice. Check the numbers below.

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Cash yield
past 12 months to June 2026
6.1%high

For every $100 of what the whole company costs, it produced $6.07 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
11.9×fair

You pay 11.9 years of operating profit for the business. The average large US company costs around 18.

Return on capital
five annual reports to December 2025
29.5%five-year median

Each dollar kept in the business earns 30 cents a year. Above 10 is good.

Quality score: 84 of 100. Price score: 100 of 100. Our list needs 70 on quality and 60 on price.

$47.93 a share, 90% above its 1-year low

Over the past year the price has ranged from $25.28 to $106.50.

Pays no dividend

Prices from Tuesday’s close (6 October).

Five years of cash, in billions

-0.1
-0.0
0.1
0.1
0.0
0.1
2021202220232024202512 monthsto Jun '26

Spare cash swings from quarter to quarter here: $67 million in the past 12 months, $14 million in the year to December 2025.

Revenue
$456m$481m$459m$476m$722m
Operating margin
-9.1%5.1%9.6%17.2%15.2%
Debt to equity
n/an/an/a1.840.54
Shares outstanding
0.02bn0.02bn0.02bn0.02bn0.02bn

Health checks

  • Free cash flow positive3 of 5 years
  • Accounting looks honest (Beneish)Not enough data
  • Financial strength (Piotroski)6 of 9
  • Profit backed by cash (accruals)No
  • Debt0.54× equity
  • Revenue growth, five yearsStrong, 11.6% a year
  • Buying back its own sharesRoughly flat

The quarter to June 2026

How the business did, compared with the same quarter a year earlier.

  • Sales: $153 million last quarter, down 21% on a year ago.
  • Profit: $17 million, down 67% on a year ago.
  • It keeps 13 cents of each $1 of sales as operating profit, down from 17 cents a year earlier.
  • Spare cash over the past 12 months: $67 million, up from $62 million.
  • About the same number of shares as a year ago.
  • It has $63 million more cash than debt. A year ago debt was $47 million more than cash.
  • Sales grew on a year ago in 2 of the last 4 quarters.
Sales by quarter
Sales by quarter
Quarter toAmount
September 2024$126m
December 2024$144m
March 2025$135m
June 2025$192m
September 2025$204m
December 2025$191m
March 2026$129m
June 2026$153m
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024$17m
December 2024$23m
March 2025$19m
June 2025$51m
September 2025$28m
December 2025$16m
March 2026$7m
June 2026$17m

From the company's quarterly reports to the SEC.

Dates

Next results (estimated)
n/a
Last annual report (10-K)
2 March 2026
Next quarterly (estimated, 10-Q)
5 November 2026

Who owns it

2 long-term investors we follow own it, down from 3 last quarter. 158 funds in all.

Jun '25
Dec '25
Jun '26

Sold out this quarter

Largest holders overall

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

Big holders and activists

6 investors own more than 5%.

  • Weichai Power Co., Ltd.
    at least 47.5%−1.2 pts
    (filed with 1 related holder)
    Since 21 August 2025
    What they said

    Item 4 is hereby amended and supplemented by adding the following: On August 8, 2025, Weichai Amercia filed a notice with the SEC on Form 144 relating to the proposed sale of up to 1,150,000 shares of Common Stock in accordance with Rule 144. From August 18, 2025 to August 21,…

    Read the filing
  • Weichai America Corp.
    at least 46.5%−1.0 pts
    (filed with 2 related holders)
    Since 26 August 2025
    What they said

    Item 4 is hereby amended and supplemented by adding the following: On August 8, 2025, Weichai Amercia filed a notice with the SEC on Form 144 relating to the proposed sale of up to 1,150,000 shares of Common Stock in accordance with Rule 144. From August 22, 2025 to August 26,…

    Read the filing
  • Neil Gagnon
    Passive investor
    at least 7.3%0.0 pts
    (filed with 1 related holder)
    Since 31 December 2024
  • at least 6.5%+1.5 pts
    (filed with 2 related holders)
    Since 30 June 2026
  • Gary S. Winemaster
    6.3%−2.1 pts
    Since 18 September 2025
  • Neil Gagnon
    Passive investor
    at least 5.0%+3.0 pts
    (filed with 2 related holders)
    Since 5 February 2025

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

What insiders did

No insider bought or sold on the open market in the last 12 months.

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.

None of the warning signs we check for were found.

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 2 Mar 2026, plus the 10-Q filed 6 Aug 2026 and 7 later 8-Ks.

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.

What could go wrong

  • Profits run ahead of cash.

Whether the price already reflects the risks is what the deep dive is for.

What changed in the risks this year

Companies must list what could hurt them each year. These are the parts that changed since last year’s report.

  • The increasing use of artificial intelligence technologies by our competitors, customers, and suppliers could impact our competitive position.

    Could happen
    We may also face risks from AI technologies used by third parties, including vendors, customers, and service providers, over which we have limited control. Any material disruption to our supply chain or competitive disadvantage resulting from third-party AI adoption could adversely affect our business, financial condition, and results of operations.
    Read more
  • The Company utilizes a global supply chain to source products, including engines, components and materials, which may subject it to tariffs, including U.S. tariffs imposed on imports from China. The Company also sells its products on a global basis, and therefore its export sales could be impacted by tariffs.

    Could happen
    On February 20, 2026, subsequent to year end, the U.S. Supreme Court struck down tariffs imposed under the International Emergency Economic Powers Act (“IEEPA”). The President immediately imposed replacement tariffs under Section 122 of the Trade Act of 1974, which are temporary (150-day maximum duration), and has indicated intent to impose tariffs under other authorities going forward . The Company may be entitled to refunds of IEEPA tariffs paid during 2025, but to the extent PSI passed tariff costs through to customers, the Company may be required to reimburse customers for such amounts, which could reduce or eliminate any net benefit from refunds. The tariff environment remains highly uncertain.
    Read more
  • The increasing use of artificial intelligence technologies by our competitors, customers, and suppliers could impact our competitive position.

    Could happen
    Artificial intelligence (“AI”) and machine learning technologies are rapidly evolving and are increasingly being adopted across industries, including in manufacturing. Our competitors, customers, and suppliers may adopt AI technologies that could affect our competitive position. If we fail to effectively adopt and integrate AI technologies, or if our competitors do so more successfully, we could experience a decline in our competitive position.
    Read more
  • Our liquidity could be adversely affected by volatility in demand, supply‑chain constraints, and significant capital investment requirements inherent in our engine manufacturing operations.

    Could happen
    We also operate in a capital‑intensive industry that requires ongoing investment in production equipment, testing facilities, tooling, and emissions‑compliance technology. If we are unable to generate sufficient cash from operations or secure financing on favorable terms, we may need to delay or scale back critical investments, which could impair our competitiveness and innovation pipeline.
    Read more
  • Ownership of the Company’s stock is concentrated with Weichai and therefore other stockholders’ ability to influence corporate matters is limited.

    Could happen
    • Legislative or regulatory actions that could restrict or prohibit business relationships with Chinese state-owned entities; and • Increased disclosure requirements or other regulatory burdens applicable to companies with significant foreign government ownership.

Read it in the annual report

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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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.