Masimo (MASI) 10-Q 2010 Q2 Quarterly report

Exhibit 12.1

Masimo Corporation

Ratio of Earnings to Fixed Charges

(dollars in thousands)

	Six Months Ended July 3, 2010		Fiscal Year Ended
			January 2, 2010			January 3, 2009		December 29, 2007		December 31, 2006		December  31, 2005
Ratio of earnings to fixed charges:
Income before provision for income taxes	$	61,756	$	82,180		$	72,391	$	68,122	$	314,403	$	7,369
Fixed charges		926		1,768			2,435		3,831		2,882		2,327
Noncontrolling interests in pre-tax (income) loss		469		(1,159	)		—		—		—		—
Total earnings	$	63,151	$	82,789		$	74,826	$	71,953	$	317,285	$	9,696
Fixed charges
Interest expensed	$	13	$	75		$	753	$	2,475	$	1,824	$	1,851
Estimate of interest within rental expense		913		1,693			1,682		1,356		1,058		476
Total fixed charges	$	926	$	1,768		$	2,435	$	3,831	$	2,882	$	2,327
Ratio of earnings to fixed charges		68.20		46.83			30.73		18.78		110.09		4.17
Ratio of earnings to fixed charges and preferred stock dividends:
Income before provision for income taxes	$	61,756	$	82,180		$	72,391	$	68,122	$	314,403	$	7,369
Fixed charges and preferred stock dividends		926		1,768			2,435		11,629		16,689		10,605
Noncontrolling interests in pre-tax (income) loss		469		(1,159	)		—		—		—		—
Total earnings	$	63,151	$	82,789		$	74,826	$	79,751	$	331,092	$	17,974
Fixed charges and preferred stock dividends
Interest expensed	$	13	$	75		$	753	$	2,475	$	1,824	$	1,851
Estimate of interest within rental expense		913		1,693			1,682		1,356		1,058		476
Preferred stock dividend requirement		—		—			—		7,798		13,807		8,278
Total fixed charges and preferred stock dividends	$	926	$	1,768		$	2,435	$	11,629	$	16,689	$	10,605
Ratio of earnings to fixed charges and preferred stock dividends		68.20		46.83			30.73		6.86		19.84		1.69