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Arq

ARQ on Nasdaq. Market value $88m.

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Should I look at this?

We have not checked this company yet

This is not advice.

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Who owns it

1 long-term investor we follow owns it, unchanged from 1 last quarter. 99 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

1 investor owns more than 5%.

  • Daniel Kaufman
    Passive investor
    5.1%
    Since 11 March 2026
  • Orin Hirschman
    Passive investor
    Sold down below 5%
    Since 31 March 2026

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

What insiders did

In the last 12 months, 7 insiders bought $907,417 of shares on the open market. 1 sold $37,929.

  • Steinmetz Shimon
    Chief Financial Officer
    Bought
    Date
    8 September 2026
    Shares
    2,972
    Price
    $2.34
    Value
    $6,953
  • Steinmetz Shimon
    Chief Financial Officer
    Bought
    Date
    4 September 2026
    Shares
    5,758
    Price
    $2.28
    Value
    $13,113
  • Steinmetz Shimon
    Chief Financial Officer
    Bought
    Date
    3 September 2026
    Shares
    16,270
    Price
    $2.22
    Value
    $36,148
  • Voncannon Jay Loring
    Chief Financial Officer
    Sold
    Date
    4 May 2026
    Shares
    16,709
    Price
    $2.27
    Value
    $37,929
  • Campbell-Breeden Richard
    Director
    Bought
    Date
    23 March 2026
    Shares
    150,000
    Price
    $2.21
    Value
    $331,500
  • Wong Joseph M
    Chief Technology Officer
    Bought
    Date
    17 March 2026
    Shares
    10,000
    Price
    $1.89
    Value
    $18,900
  • Smith Claiborne Benson
    Gen Counsel, Corp Secretary
    Bought
    Date
    16 March 2026
    Shares
    1,000
    Price
    $1.92
    Value
    $1,920
  • EICHER CAROL S
    Director
    Bought
    Date
    13 March 2026
    Shares
    77,500
    Price
    $1.95
    Value
    $151,125
  • Smith Claiborne Benson
    Gen Counsel, Corp Secretary
    Bought
    Date
    12 March 2026
    Shares
    1,000
    Price
    $1.92
    Value
    $1,920
  • Voncannon Jay Loring
    Chief Financial Officer
    Bought
    Date
    11 November 2025
    Shares
    6,000
    Price
    $3.55
    Value
    $21,300

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 10 Mar 2026, plus the 10-Q filed 10 Aug 2026 and 11 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.

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.