TransDigm Group INC (TDG) Stock
TDG has an Alpha Score of 42 out of 100 (weak), computed on Oct 29, 2026 from 3 of 4 sub-scores. 14 members of Congress disclosed 46 trades in TDG since 2013: 26 purchases and 20 sales, most recently April McClain Delaney (sale, Aug 25, 2026). 9 of the hedge funds AlphaScala tracks reported TDG in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Citadel's at $126.71M. Company insiders reported 0 open-market buys and 81 sales on SEC Form 4 in the 90 days to Nov 3, 2026. Its trailing P/E ratio is 31.2 and its net margin 21.3% (key statistics as of Nov 3, 2026).
What is TDG's Alpha Score?
How it works →Alpha Score of 42 reflects weak overall profile with weak momentum, weak value, moderate quality. Based on 3 of 4 signals – score is capped at 90 until remaining data ingests.
Computed from 3 of 4 sub-scores; a sub-score is left out when its inputs are missing, and the composite is capped accordingly.
Computed Oct 29, 2026
A rules-based research rating, not a recommendation to buy or sell.
Which members of Congress traded TransDigm Group INC (TDG)?
Most recent: April McClain Delaney (sale, Aug 25, 2026); records start Dec 13, 2013.
| Politician | Trade date | Type | Amount |
|---|---|---|---|
| April McClain Delaney D-MD · House | 2026-08-25 | sale | $100k – $250k |
| April McClain Delaney D-MD · House | 2026-07-28 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-22 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-21 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-13 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-08 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-05-07 | purchase | $1k – $15k |
| April McClain Delaney D-MD · House | 2026-04-29 | purchase | $1k – $15k |
From STOCK Act periodic transaction reports. House filings as of Nov 2, 2026. Senate records here end Oct 21, 2026; later Senate trades are not included.
Every member of Congress who traded TDG, with filing lags →Which hedge funds own TDG?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Citadel Ken Griffin | 95K | $126.71M | +5% |
| Third Point Dan Loeb | 79K | $105.23M | +216% |
| Lone Pine Capital Steve Mandel | 29K | $38.01M | -20% |
| Renaissance Technologies Jim Simons (founder) | 26K | $34.13M | +30% |
| Millennium Management Israel Englander | 14K | $18.23M | +496% |
| Blackstone | 10K | $13.12M | +67% |
| Marshall Wace | 4K | $5.41M | -92% |
| D.E. Shaw David Shaw | 4K | $5.04M | -82% |
| Bridgewater Associates Ray Dalio | 2K | $2.47M | -20% |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are TransDigm Group INC insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 20 | $22K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 100 | $111K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 100 | $111K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 50 | $56K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 60 | $67K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 100 | $112K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 30 | $34K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 60 | $67K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 131 | $147K |
| Oct 15, 26 | Reiss Joel | Co-Chief Operating Officer | SELL | 306 | $344K |
SEC Form 4 filings as of Nov 3, 2026
See cluster-buy signals across all tickers →What are TDG's key statistics?
Key statistics as of Nov 3, 2026
How does TDG's valuation compare with the Industrials sector?
| Metric | TDG | Industrials median | Companies in median |
|---|---|---|---|
| P/E ratio | 31.2 | 28.1 | 173 |
| Net margin | 21.28% | 8.63% | 192 |
| Return on equity | 37.11% | 15.83% | 192 |
Medians over the Industrials stocks whose key statistics were refreshed in the last 35 days (newest Nov 4, 2026). P/E excludes loss-making companies.
TDG price chart
Powered by TradingViewWhat does TransDigm Group INC do?
TransDigm Group Inc. is a global designer, manufacturer, and supplier of highly engineered aerospace components for commercial, military, and regional aircraft. Founded in 1993 and headquartered in the Cleveland, Ohio area, the company specializes in proprietary systems and components critical to aircraft performance and safety. Its product portfolio spans electromechanical actuators, pumps, valves, ignition systems, sensors, latches, and power generation and conversion equipment that serve both original equipment manufacturers and maintenance, repair and overhaul providers. TransDigm operates through three business segments: Power and Control, which encompasses power management and control components; Airframe, covering structural and interior components; and a smaller Non-Aviation segment serving off-road vehicles and mining equipment. The company maintains a global footprint with production facilities and support centers across North America, Europe, Asia-Pacific, Latin America and the Middle East, enabling responsive customer service and efficient aftermarket distribution. Strategic acquisitions of niche aerospace suppliers represent a key growth driver, allowing TransDigm to broaden its product offerings and strengthen its position in specialized market segments. The company emphasizes proprietary designs with strong aftermarket demand and high barriers to entry, positioning itself as a leading provider of mission-critical aerospace components worldwide.