TransDigm Group Incorporated

TDG Industrials · Aerospace & Defense
Delayed 15 min
Last close
$1,134.24
Oct 16, 2026
52-week range
$1,071.25 — $1,463.03
-22% from high
Market cap
62.7B
Diluted basis
Dividend yield
—
No dividend declared
P/E
34.4
Trailing
Filing.fyi verdict · Oct 16, 2026

Fairly valued.

TransDigm's profits grew but negative equity and $29.29 billion of debt define its balance sheet.

Neutral Beneish: -2.31Altman Z″: 0.78Piotroski: 7/9
RED DEEP 67 / 100
Composite Health
Forensic readings · derived from the latest filing

The four readings.

Each score answers a different question. The composite at the top is the average; the disagreement below is the story.
Beneish M Earnings manipulation
-2.31
Clean
−3.0 threshold −1.78 +1.0
Altman Z″ Bankruptcy proximity
0.78
Distress zone
0 threshold 1.10 / 2.60 4.0
Piotroski F Fundamental health (0–9)
7
Strong
0 threshold 6+ 9
AI synthesis · written from this company's SEC filings · not investment advice

What the filing actually says.

AI · forensic preset

The forensic scores should be read together rather than one at a time. The Beneish M-Score is -2.314, which is below the -1.78 threshold and therefore not in the elevated manipulation-risk zone. This is a statistical screen built from accounting ratios, not a finding that the statements are accurate. The Altman Z-Score here is the Z double-prime variant at 0.78, which the label places in the distress zone. This model estimates distress risk from the balance sheet, and a reading in this zone reflects the company's capital structure, including its negative equity, rather than a prediction of default. The Piotroski F-Score is 7 of 9 computable signals, meaning seven of the checks that could be computed were met. The cash-flow comparison deserves a closer look. Operating cash flow divided by net income is 0.98 for fiscal 2025, close to one-to-one, but cash generation did not grow alongside reported earnings. The risk factors describe covenants in the senior secured credit facility and in the indentures governing the senior secured and senior subordinated notes, along with the Securitization Facility. Readers may want to look at the debt footnotes in the 10-K for maturities and swap coverage, which the excerpt does not include. The Simmonds acquisition was excluded from management's internal control assessment as of March 28, 2026, so readers may want to check whether the next annual filing reports on it. The legal proceedings section states that management does not expect a material adverse effect from ordinary-course claims and points to Note 13 for detail.

Catalyst.The filings show fiscal 2025 revenue of $8.83 billion, up 11.2% from $7.94 billion in fiscal 2024, with operating income rising from $3.53 billion to $4.17 billion. The MD&A excerpt, from the 10-Q for the quarter ended March 28, 2026, does not include a results discussion, so the segment and product drivers management cites are not visible here. The most concrete recent development in the excerpt is the Simmonds acquisition, completed in the quarter ended December 27, 2025 and still being integrated. In November 2025 the Board authorized an additional $5.0 billion in share repurchases, and the company repurchased 602,070 shares in the second quarter of fiscal 2026.

Hidden risk.The most material tension is the balance sheet. Total liabilities of $32.59 billion exceed total assets of $22.91 billion, and equity is negative $9.69 billion, compared with negative $6.29 billion a year earlier. Long-term debt rose from $24.39 billion to $29.29 billion, about 20% in one year. The risk factors say a significant portion of the variable-rate debt is tied to Term SOFR, so higher rates would increase debt service. Operating cash flow was flat at $2.04 billion while net income rose to $2.07 billion, and the top ten customers accounted for approximately 40% of fiscal 2025 net sales.

Market signals · from trading data, not filings

What traders are betting.

The scores above come from what TDG reports to the SEC. These readings come from how traders are positioned in its shares. They change quickly, they can be wrong, and they are not part of the verdict.
Short interest Shares sold short · reported twice a month
2.9%
of the shares available to trade
Low
0%5% · 10% · 20%25%+

The metric

Shares that traders have borrowed and sold, betting the price will fall, and not yet bought back. Brokers report the total to FINRA twice a month. Days to cover divides it by the shares that change hands on a typical day.

Shares sold short
1.2M
Change since Aug 31
+33.4%
Days to cover
3.0

What it tells us

Few traders are betting against TDG. Levels this low are common for large, widely held companies.

Short sellers added to their bets: shares sold short grew 33.4% since the Aug 31 report.

At normal trading volume, short sellers would need about 3.0 days to buy back every borrowed share.

How investors use it

  • Squeeze watching. Some aggressive traders seek out heavily shorted stocks, betting that good news will force short sellers to buy back shares and push the price higher.
  • Hedging. Funds short one company to offset risk in another, often owning a stronger business and shorting a weaker one in the same industry.
  • Timing. Chart-based traders pair rising short interest with price patterns, such as a break below a level where buyers used to step in, to decide when to enter or exit.
  • Warning sign. Some owners treat a sharp rise in short interest as a red flag and respond by tightening stop-loss orders or holding smaller positions.

Lesson: short interest, explained →

Short-interest report for Sep 30, 2026, via Yahoo Finance. Reports come out about a week and a half after that date.

SEC filings · last 12 months

Quarterly reports

The quarterly reports (10-Q) and current reports (8-K) TransDigm Group filed in the last 12 months, each linked to the original document on SEC EDGAR.

  • Sep 29, 2026
    8-K
    Current reportItem 1.01: Signed a material agreement; Item 2.03: New debt or other financial obligation
    ★ Curriculum-relevant
    EDGAR →
  • Sep 28, 2026
    8-K
    Current reportItem 8.01: Other events0
    EDGAR →
  • Sep 21, 2026
    8-K
    Current reportItem 8.01: Other events0
    EDGAR →
  • Sep 14, 2026
    8-K
    Current reportItem 7.01: Regulation FD disclosure (investor materials)0
    EDGAR →
  • Sep 14, 2026
    8-K
    Current reportItem 7.01: Regulation FD disclosure (investor materials)0
    EDGAR →
  • Sep 14, 2026
    8-K
    Current reportItem 7.01: Regulation FD disclosure (investor materials)0
    EDGAR →
  • Aug 4, 2026
    10-Q
    Quarterly report0
    EDGAR →
  • Aug 4, 2026
    8-K
    Current reportItem 2.02: Results of operations (earnings)0
    EDGAR →
  • Jul 27, 2026
    8-K
    Current reportItem 8.01: Other events0
    EDGAR →
  • Jul 24, 2026
    8-K
    Current reportItem 5.02: Departure/appointment of officers or directors
    ★ Curriculum-relevant
    EDGAR →
  • Jul 13, 2026
    8-K
    Current reportItem 8.01: Other events0
    EDGAR →
  • May 5, 2026
    10-Q
    Quarterly report (2026-03-28)Period: 2026-03-280
    EDGAR →
Further reading · curated for this filing

If this case caught your eye

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Financial Shenanigans

Howard M. Schilit

Schilit's framework for the seven shenanigan types is the standard reference for the kind of MD&A pattern-matching this site does.

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The Interpretation of Financial Statements

Benjamin Graham

The original — and still the clearest — explanation of why working-capital trends matter more than headline earnings.

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Quality of Earnings

Thornton L. O'glove

Out of print, expensive, worth it. The chapter on receivables-vs-revenue divergence applies almost word-for-word to most distressed filings.

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