TransDigm (TDG)
The desk's stance
Holding since Sep 23, 2026, on the G-Street slate.
Proprietary aerospace parts print 60% gross margins, but a heavy $33.5B debt load keeps us holding rather than adding today.
Add below $1,050 · review for sale near $1,310.
What the company does
Portfolio of sole-source aircraft parts with legendary pricing power — if a jet flies, TransDigm probably owns something on it.
In short: Proprietary engineered aircraft components. Category: Proprietary Aerospace Components Monopoly. Sector: Industrials, Aerospace & Defense.
G-Street Value and Score
G-Street Value: $1,277.40, computed Oct 18, 2026 (confidence: medium).
How we got there: 70% analyst leg $1277.4 (5 analyst targets, credibility- and freshness-weighted, after 8% optimism discount) + 30% GainStreet factor value $1462.64 (30.06× fwd EPS anchored to aerospace-defense multiples) — capped at the analyst leg; factors never out-bull the street.
G-Street Score: 67 out of 100 (Medium).
- Top-line growth & guidance: 22 of 32
- Margin power: 8 of 15
- Revenue visibility & quality: 8 of 11
- Profitability & balance sheet: 21 of 24
- Capital allocation & governance: 5 of 6
- Valuation, sentiment & momentum: 3 of 12
Our current thesis
Updated Oct 18, 2026
The thesis
- Proprietary catalog drives ~60% gross margins with sole-source positions on virtually every aircraft platform.
- Sequential revenue accelerated to $2.74B alongside four straight quarterly EPS beats and raised guidance.
- Double-digit commercial aftermarket expansion and flight-hour growth sustain exceptional pricing power.
Risks
- Massive $33.5B debt load inflates interest expense and restricts further debt-financed special dividends.
- Pentagon and DOJ scrutiny over sole-source parts pricing threatens long-term margins and M&A.
- Peer supplier HWM delivers comparable 24% growth with far cleaner balance sheet leverage.
What we're watching
- Q4 FY2026 earnings release and initial FY2027 guidance expected on November 5, 2026.
- Technical price support holding above the 52-week low of $1,071.25.
- Accretion and integration execution on recently closed bolt-on acquisitions like Prince & Izant.
Latest
TransDigm trades at $1,139.34, stabilizing just above its 52-week low of $1,071.25 as multiple de-rating across aerospace suppliers overshadows operational strength. Fundamental execution remains strong, with quarterly revenue accelerating 22.5% year-over-year to $2.74B alongside a fourth consecutive quarterly beat-and-raise. However, a $33.5B total debt load and rising interest expense continue to weigh on valuation multiples despite resilient aftermarket cash generation.
Key numbers
As of Oct 16, 2026: market cap $63.0B · revenue growth +22.5% year over year · gross margin 59.8% · net margin 21.3% · forward P/E 23.4 · next earnings Nov 5, 2026.
Analyst price targets
Published analyst targets we could trace to a named source.
- Goldman Sachs, Buy: $1,745 target (October 2026). Source: www.tipranks.com
- Morgan Stanley, Equal Weight: $1,300 target (October 2026). Source: www.marketscreener.com
- TD Cowen, Buy: $1,300 target (October 2026). Source: stockanalysis.com
- Susquehanna, Hold: $1,350 target (October 2026). Source: stockanalysis.com
- Wells Fargo, Hold: $1,210 target (September 2026). Source: stockanalysis.com
Decision history
- Sep 23, 2026 — Buy Zone → Holding at $1,105.28. Using the September 23 reference close of $1,105.28, TransDigm is about 11% below our $1,235.48 entry. The aftermarket franchise and proposed $240M Extant asset acquisition support retention, while leverage and refinancing costs remain material risks. The system G-Street Value of $1,420.02 is provisional and its forward earnings period needs verification. Hold; review cash generation and financing terms, without treating the prior entry price as a reason to keep it.
- Aug 13, 2026 — Moved to Buy Zone at $1,235.48. Reopening the position the robot cut over month-old news: the DOJ story was July's $960M Stellant walk-away, while the $2.2B aftermarket deal CLOSED and guidance went UP. 23% growth, 21% margins, zero AI-capex dependence.
- Aug 12, 2026 — Sold at $1,235.48: -1.1% since entry (Cut). DOJ acquisition block stalls the inorganic growth engine; exiting to reallocate into higher-conviction AI energy plays.
- Aug 12, 2026 — Moved to Buy Zone at $1,249.55. Aerospace aftermarket toll booth: 23% growth, 21% margins, raised guidance and a $2.2B bolt-on — and it doesn't live or die on AI capex like most of this slate. Our $1,478 value sits below the street's $1,537.
On the Gainz Lab maps
Who it does business with
- TransDigm supplies Lockheed Martin — Sole-source parts (about $1.0B a year). TransDigm’s sole-source components sit across the primes’ aircraft programs.
- TransDigm supplies General Dynamics — Aircraft components. Gulfstream and defense aircraft carry TransDigm parts.