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Flexible Solutions International

FSI on NYSEAmerican. Market value $78m.

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. 31 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

2 investors own more than 5%.

  • Daniel B. O'Brien
    Insider or founder
    36.1%
    Since 27 January 2026
    What they said

    N/A

    Read the filing
  • Comprehensive Financial Planning, Inc.
    Passive investor
    10.1%
    Since 31 December 2024

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

What insiders did

No insider bought shares on the open market in the last 12 months. 1 sold $715,050.

  • O BRIEN DANIEL B
    Chief Executive Officer, Director
    Sold
    Date
    3 February 2026
    Shares
    16,497
    Price
    $5.78
    Value
    $95,353
  • O BRIEN DANIEL B
    Chief Executive Officer, Director
    Sold
    Date
    29 January 2026
    Shares
    4,003
    Price
    $5.89
    Value
    $23,578
  • O BRIEN DANIEL B
    Chief Executive Officer, Director
    Sold
    Date
    28 January 2026
    Shares
    45,500
    Price
    $5.84
    Value
    $265,720
  • O BRIEN DANIEL B
    Chief Executive Officer, Director
    Sold
    Date
    27 January 2026
    Shares
    56,000
    Price
    $5.90
    Value
    $330,400

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 Flexible Solutions International’s 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 15 Apr 2026, plus the 10-Q filed 14 Aug 2026 and 6 later 8-Ks.

  • Weak checks on its own accounts

    Serious

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

    “Because of the material weaknesses, management has concluded that our ICFR was not effective as of December 31, 2025 and 2024.”
    Show the full paragraph
    During this assessment for the years ended December 31, 2025, management identified material weaknesses in our internal control over financial reporting (“ICFR”) related to a material adjustment identified during the audit process indicating that controls over the financial statement close and review process were not operating effectively to prevent or detect misstatements on a timely basis. A material weakness is a deficiency, or a combination of deficiencies, in ICFR, such that there is a reasonable possibility that a material misstatement of the Company’s financial statements will not be prevented or detected on a timely basis. Because of the material weaknesses, management has concluded that our ICFR was not effective as of December 31, 2025 and 2024. In 2026, we will implemented new procedures to improve our financial statement close and review process.

    From the 10-K filed 15 April 2026, Item 9A. Controls and Procedures. 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.