Cabaletta Bio

CABA on Nasdaq. Cabaletta Bio develops cell therapies to treat people with autoimmune diseases. Market value $353m.

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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.

We can't read total debt from the filing, so debt is left out.

Should I look at this?

Look carefully before going further

Read the warning sign in its own filings

This is not advice. Check the numbers below.

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Cash yield
past 12 months to June 2026
-45.0%low

For every $100 of what the whole company costs, it produced $-45.03 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
n/a

The filings do not give us enough to work this out.

Return on capital
five annual reports to December 2025
n/a

The filings do not give us enough to work this out.

Quality score: not known. Price score: 0 of 100. Our list needs 70 on quality and 60 on price.

$2.02 a share, 10% above its 1-year low

Over the past year the price has ranged from $1.83 to $4.23.

Pays no dividend

Prices from Tuesday’s close (6 October).

Five years of cash, in billions

-0.0
-0.0
-0.1
-0.1
-0.1
-0.2
2021202220232024202512 monthsto Jun '26
Revenue
n/an/an/an/an/a
Operating margin
n/an/an/an/an/a
Debt to equity
n/an/an/an/an/a
Shares outstanding
0.03bn0.04bn0.05bn0.10bn0.17bn

Health checks

  • Free cash flow positive0 of 5 years
  • Accounting looks honest (Beneish)Not enough data
  • Financial strength (Piotroski)Not enough data
  • Profit backed by cash (accruals)No
  • DebtUnknown
  • Revenue growth, five yearsUnknown
  • Buying back its own sharesNo, 484% more shares since 2021

The quarter to June 2026

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

  • A loss of $51 million, compared with a loss of $45 million a year ago.
  • Over the past 12 months it spent $154 million more cash than it brought in, compared with $106 million a year earlier.
  • 144% more shares than a year ago. Each share owns a bit less of the company.
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024-$31m
December 2024-$33m
March 2025-$36m
June 2025-$45m
September 2025-$45m
December 2025-$42m
March 2026-$44m
June 2026-$51m

From the company's quarterly reports to the SEC.

Dates

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

Who owns it

1 long-term investor we follow owns it, unchanged from 1 last quarter. 140 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

11 investors own more than 5%.

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

What insiders did

In the last 12 months, 8 insiders bought $296,210 of shares on the open market.

  • Chang David J.
    Chief Medical Officer
    Bought
    Date
    21 January 2026
    Shares
    8,800
    Price
    $2.26
    Value
    $19,888
  • Binder Gwendolyn
    President, Science & Tech.
    Bought
    Date
    21 January 2026
    Shares
    11,312
    Price
    $2.19
    Value
    $24,773
  • Tomasello Shawn
    Director
    Bought
    Date
    21 January 2026
    Shares
    22,725
    Price
    $2.21
    Value
    $50,222
  • Gavel Steve
    Chief Commercial Officer
    Bought
    Date
    21 January 2026
    Shares
    22,170
    Price
    $2.27
    Value
    $50,326
  • Bollard Catherine
    Director
    Bought
    Date
    21 January 2026
    Shares
    4,405
    Price
    $2.27
    Value
    $9,999
  • Nichtberger Steven
    President & CEO, Director
    Bought
    Date
    21 January 2026
    Shares
    45,000
    Price
    $2.24
    Value
    $100,800
  • Simon Mark
    Director
    Bought
    Date
    21 January 2026
    Shares
    11,061
    Price
    $2.28
    Value
    $25,219
  • Gerard Michael
    General Counsel
    Bought
    Date
    21 January 2026
    Shares
    6,600
    Price
    $2.27
    Value
    $14,982

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 Cabaletta Bio’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 23 Mar 2026, plus the 10-Q filed 13 Aug 2026 and 9 later 8-Ks.

  • Doubt it can keep going

    Serious

    The company or its auditor warned it may not have enough money to last the next year.

    “Accordingly, the Company has concluded that substantial doubt exists about the Company’s ability to continue as a going concern.”
    Show the full paragraph
    The Company expects that its current cash and cash equivalents may be sufficient to fund operations for at least the next twelve months from the date of issuance of these unaudited condensed consolidated financial statements; however, the Company's cash forecast contains estimates and assumptions with significant variability and management cannot predict the amount or timing of all expenditures with certainty. The Company’s ultimate success depends on the outcome of its research and development activities. Management expects to incur additional losses in the future as it continues its research and development and will need to raise additional capital to fully implement its business plan and to fund its operations. The Company intends to raise such additional capital through a combination of equity offerings, debt financings, government funding arrangements, strategic alliances or other sources. However, if such financing is not available at adequate levels and on a timely basis, or such agreements are not available on favorable terms, or at all, as and when needed, the Company will need to reevaluate its operating plan and may be required to delay or discontinue the development of one or more of its product candidates or operational initiatives. Accordingly, the Company has concluded that substantial doubt exists about the Company’s ability to continue as a going concern. The a ccompanying financial statements have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business.

    From the 10-Q filed 13 August 2026, Part I, Item 1. Financial Statements. 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.

What could go wrong

Cheap for a reason is the question the numbers cannot answer.

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

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.