FLY vs TDG vs BA Stock Comparison

Firefly Aerospace, TransDigm and Boeing Prices as of Oct 23, 2026 Peers: Industry group
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FLY Firefly Aerospace Inc.
$18.23 -16.8% 1M -29.8% 1Y
Market cap
$2.95B
P/E
–
Revenue (TTM)
$287.01M
Div. yield
–
Space Industrials
2 wins
TDG TransDigm Group INC
$1,105.84 +0.1% 1M -18.1% 1Y
Market cap
$64.86B
P/E
33.9x
Revenue (TTM)
$10.01B
Div. yield
–
Commercial Aerospace Industrials
6 wins
BA Boeing Co
$188.29 -5.7% 1M -13.5% 1Y
Market cap
$148.46B
P/E
71.0x
Revenue (TTM)
$94.00B
Div. yield
–
Commercial Aerospace Industrials
2 wins

Head to Head

10 decided of 12

TransDigm leads on 6 of the 12 questions below (TransDigm 6, Boeing 2, Firefly Aerospace 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionFLYTDGBALeader
Larger companyMarket capitalisation $2.95B $64.86B $148.46B BA
Cheaper on earningsLower P/E, profitable companies only -8.0x 33.9x 71.0x TDG
Cheaper on forward earningsLower price / next fiscal year consensus EPS — 25.1x — –
Faster revenue growthRevenue growth, trailing twelve months +179.2% +16.6% +24.8% FLY
More profitableNet margin, trailing twelve months -129.1% 19.1% 2.2% TDG
Better return on capitalReturn on invested capital -25.8% 15.5% 7.7% TDG
Less leveragedLower net debt / EBITDA 2.1x 6.1x 3.8x FLY
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -29.8% -18.1% -13.5% BA
Better 5-year returnAnnualised price return, 5 years — +11.3%/yr -2.4%/yr TDG
Less volatileAnnualised volatility, 1 year 106.8% 27.1% 34.4% TDG
Higher overall scoreMean of the five percentile scores vs peers 36/100 66/100 48/100 TDG

Percentile Scorecard

FLYTDGBA

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisFLYTDGBA
Valuation 17 #83 of 100 53 #48 of 100 44 #56 of 100
Growth 59 #40 of 97 67 #33 of 97 81 #19 of 97
Profitability 22 #75 of 96 96 #5 of 96 54 #45 of 96
Financial Health 70 #33 of 106 16 #89 of 106 11 #94 of 106
Shareholder Returns 9 #59 of 65 97 #3 of 65 –
Overall 36 66 48
  • FLY ranked among 107 companies in Aerospace and Defense
  • TDG ranked among 107 companies in Aerospace and Defense
  • BA ranked among 107 companies in Aerospace and Defense

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodFLYTDGBASPY
1 month -16.8%+0.1%-5.7% -1.0%
3 months -7.4%-10.6%-10.2% +2.9%
6 months -48.1%-3.7%-19.0% +6.4%
Year to date -18.5%-16.8%-13.3% +11.4%
1 year -29.8%-18.1%-13.5% +13.1%
3 years —+33.1%+3.3% +79.4%
3 years, per year —+10.0%+1.1% +21.5%
5 years —+70.6%-11.6% +67.7%
5 years, per year —+11.3%-2.4% +10.9%
10 years —+320.7%+38.8% +255.2%
10 years, per year —+15.5%+3.3% +13.5%

Risk

MeasureFLYTDGBASPY
Volatility, 1Y 106.8%27.1%34.4% 12.7%
Downside volatility, 1Y 99.1%28.9%33.2% 12.7%
Beta vs S&P 500, 1Y 3.430.741.23 1.00
Return / volatility, 1Y -0.28-0.67-0.39 1.03
Max drawdown, 5Y -73.0%-33.6%-50.3% -25.4%
From 52-week high -69.0%-23.7%-25.3% -2.5%
52-week high $58.81$1,450.00$252.15 $779.14
52-week low $16.31$1,076.01$179.12 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleFLYTDGBA
P/E now vs peer median -8.0xmedian 26.2x 33.2xmedian 26.2x 71.2xmedian 26.2x
P/S now vs peer median 10.6xmedian 2.9x 6.1xmedian 2.9x 1.6xmedian 2.9x
EV/EBITDA now vs peer median -8.3xmedian 14.7x 18.1xmedian 14.7x 25.7xmedian 14.7x
P/FCF now vs peer median -9.3xmedian 24.9x 31.7xmedian 24.9x -708.7xmedian 24.9x
P/B now vs peer median 2.5xmedian 2.4x -6.2xmedian 2.4x 24.3xmedian 2.4x
PEG now vs peer median —median 0.92 1.57median 0.92 2.15median 0.92

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsFLYTDGBA
Revenue $287.01M $10.01B $94.00B
Gross profit $65.79M $5.96B $4.40B
Operating income -$338.66M $4.61B $4.60B
Net income -$363.46M $2.13B $2.43B
Free cash flow -$326.49M $1.93B -$210.00M
R&D $245.37M – $3.69B
EPS (diluted) $-2.29 $33.29 $2.64
Cash & equivalents $459.82M $2.77B $7.24B
Total debt $372.55M $33.49B $45.90B
Shares (diluted) 161.78M 57.40M 790.80M
Enterprise value -$123.28M $52.87B $55.15B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricFLYTDGBA
P/E -8.0x 33.2x 71.2x
P/FCF -9.3x 31.7x -708.7x
P/Operating cash flow -11.5x 27.8x 40.9x
P/S 10.6x 6.1x 1.6x
P/B 2.5x -6.2x 24.3x
P/Tangible book 2.8x -4.2x 32.5x
EV/EBITDA -8.3x 18.1x 25.7x
EV/EBIT -7.2x 19.9x 38.0x
EV/Revenue 8.4x 9.2x 1.9x
EV/FCF -7.4x 47.7x -831.9x
EV/Operating cash flow -9.2x 41.8x 48.0x
PEG (3Y EPS CAGR) – 1.57 2.15

Growth

14 metrics
MetricFLYTDGBA
Revenue growth (1Y) 179.2% 16.6% 24.8%
Revenue CAGR (3Y) – 17.0% 8.5%
Gross profit growth (1Y) 1,165% 16.9% 1,902%
Gross profit CAGR (3Y) – 17.9% -3.6%
Operating income growth (1Y) -51.0% 16.7% 149.8%
Operating income CAGR (3Y) – 19.4% 49.8%
Net income growth (1Y) -46.1% 10.2% 122.8%
Net income CAGR (3Y) – 22.8% 36.4%
EPS growth (1Y) 89.5% 10.5% 118.3%
EPS CAGR (3Y) – 21.1% 33.1%
Operating cash flow growth (1Y) -63.7% 4.5% 158.8%
Operating cash flow CAGR (3Y) – 22.8% -26.6%
Free cash flow growth (1Y) -77.2% 1.1% 97.5%
Free cash flow CAGR (3Y) – 22.4% -26.6%

Profitability

14 metrics
MetricFLYTDGBA
Gross margin 22.9% 59.6% 4.7%
EBITDA margin -102.3% 50.7% 7.2%
Operating margin -118.0% 46.0% 4.9%
Pretax margin -139.6% 27.4% 3.0%
Net margin -129.1% 19.1% 2.2%
FCF margin -113.8% 19.3% -0.2%
Operating cash flow margin -92.1% 22.0% 3.9%
Return on equity -31.2% – 40.4%
Return on assets -23.2% 8.2% 1.5%
Return on invested capital -25.8% 15.5% 7.7%
Return on capital employed -26.6% 19.6% 8.2%
Asset turnover 0.2x 0.4x 0.6x
Cash conversion (OCF / net income) 0.7x 1.0x 1.5x
Stock comp / revenue 16.1% 1.5% 0.5%

Financial Health

11 metrics
MetricFLYTDGBA
Debt / assets 1.6% 125.2% 27.7%
Debt / equity 0.0x -3.4x 7.5x
Net debt / EBITDA 2.1x 6.1x 3.8x
Debt / FCF -0.1x 17.4x -218.6x
Liabilities / assets 25.4% 136.7% 96.3%
Equity / assets 74.6% -36.7% 3.7%
Interest coverage -18.2x 2.5x 1.8x
Current ratio 2.7x 3.0x 1.1x
Quick ratio 2.4x 1.9x 0.3x
Cash ratio 2.2x 1.1x 0.2x
Altman Z-score 3.20 1.70 1.47

Shareholder Returns

7 metrics
MetricFLYTDGBA
Dividend yield – – –
Net buyback yield -39.3% 2.7% –
Shareholder yield -39.3% 2.7% 0.0%
Payout ratio (earnings) – – –
Payout ratio (FCF) – – –
Dividend growth (1Y) – – –
Dividend CAGR (3Y) – – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusFLYTDGBA
Forward P/E – 25.1xFY2026 –
EPS, next fiscal year $-1.90FY2026 $44.02FY2026 $-1.03FY2026
EPS growth, next FY – +17.9%FY2026 -186.6%FY2026
EPS growth, the year after – +7.9% –
Revenue, next fiscal year $464.32MFY2026 $10.01BFY2026 $91.39BFY2026
Revenue growth, next FY +190.5%FY2026 +13.4%FY2026 +2.2%FY2026
Revenue growth, the year after +41.1% +24.2% +18.3%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersFLYTDGBA
Held by institutions 57.0% 93.2% 75.6%
Institutions holding 267 1,140 2,626
Change in shares held, QoQ +46.3% +1.2% +2.3%
Institutions buying 211 584 1,327
Institutions selling 34 367 843
Buyers to sellers 6.21 1.59 1.57

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

FLYTDGBA
FLY 1.00 0.09 0.26
TDG 0.09 1.00 0.38
BA 0.26 0.38 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, FLY, TDG and BA?

Boeing (BA) is the largest by market capitalisation: Firefly Aerospace (FLY) $2.95B, TransDigm (TDG) $64.86B, Boeing (BA) $148.46B.

Which stock is cheaper, FLY, TDG and BA?

TransDigm (TDG) trades on the lowest price-to-earnings ratio (Firefly Aerospace (FLY) -8.0x, TransDigm (TDG) 33.9x, Boeing (BA) 71.0x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Firefly Aerospace (FLY) grew revenue fastest over the trailing twelve months: Firefly Aerospace (FLY) +179.2%, TransDigm (TDG) +16.6%, Boeing (BA) +24.8%.

Which company is more profitable?

TransDigm (TDG) has the highest net margin (Firefly Aerospace (FLY) -129.1%, TransDigm (TDG) 19.1%, Boeing (BA) 2.2%). On return on invested capital, TransDigm (TDG) leads (Firefly Aerospace (FLY) -25.8%, TransDigm (TDG) 15.5%, Boeing (BA) 7.7%).

Which stock has performed better?

Over the past year Boeing (BA) returned the most: Firefly Aerospace (FLY) -29.8%, TransDigm (TDG) -18.1%, Boeing (BA) -13.5%. Over five years, TransDigm (TDG) compounded fastest (TransDigm (TDG) +11.3%/yr, Boeing (BA) -2.4%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, TransDigm (TDG) has been the steadiest (Firefly Aerospace (FLY) 106.8%, TransDigm (TDG) 27.1%, Boeing (BA) 34.4%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, FLY, TDG and BA?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, TransDigm (TDG) leads on 6. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.