How to Buy Masimo Corporation (MASI) Stock

Where to buy MASI

13 brokers in our matrix offer MASI. Verify availability and current fees with each broker before trading.

Broker	Commission	Fractional	Extended	Overnight	Options	OTC access
Charles Schwab (thinkorswim)Review	$0	Schwab Stock Slices, S&P 500 only, ≥ $5/slice, up to 30 at once		~1,130	$0.65	Most (3/5)
E*TRADE (Morgan Stanley)Review	$0 listed			~20	$0.65	Most (4/5)
FidelityReview	$0	Stocks by the Slice, 7,000+ stocks/ETFs, from $1			$0.65	Partial (2+0)
FirstradeReview	$0	~4,000+ tickers, ≥ $5		~1,200	$0	Most (4/5)
Interactive BrokersReview	$0 (Lite) / per-share (Pro)			~10,000	per-contract pricing	Full
Merrill EdgeReview	$0				$0.65	Most (3/5)
MoomooReview	$0				$0	Limited only
Public.comReview	$0				rebate model	Limited only
RobinhoodReview	$0	≥ $1 stocks, market cap ≥ $25M		~1,134	$0	None
SoFi Active InvestingReview	$0				$0	Partial (1+2)
tastytradeReview	$0 stocks				$1.00 open, $0 close (capped at $10 per leg)	Limited only
TradeStationReview	$0 listed				$0.50 / $0.60	Most (4/5)
WebullReview	$0				$0	Limited only

24-Hour / Overnight trading

MASI may be eligible for overnight trading via Charles Schwab (thinkorswim), Interactive Brokers, Robinhood, E*TRADE (Morgan Stanley), Webull, Moomoo, Firstrade. Each broker maintains its own eligibility list — confirm before placing an order.

About Masimo Corporation

Masimo Corp is a medical technology company. The company oepates in single segment namely Healthcare. The healthcare business segment is a key revenue driver, develops, manufactures, and markets a variety of noninvasive patient monitoring technologies, hospital automation and connectivity solutions, remote monitoring devices and consumer health products. The company sells its products to hospitals, emergency medical service providers, home care providers, physician offices, veterinarians, and others.

Sector

ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS

Employees

2,200

Headquarters

IRVINE, CA

Listed

2007-08-08

Market cap

$9.36B

Frequently asked

Where can I buy Masimo Corporation (MASI)?

MASI is offered by 13 brokers in our matrix, including Charles Schwab (thinkorswim), E*TRADE (Morgan Stanley), Fidelity, Firstrade, Interactive Brokers. Compare commissions, fractional eligibility, and overnight availability in the broker matrix above.

Can I buy MASI after hours or overnight?

Yes. MASI is on the 24-hour eligibility list for Charles Schwab (thinkorswim), Interactive Brokers, Robinhood, E*TRADE (Morgan Stanley), and others. Overnight sessions route through ATSs with wider spreads and limit-orders only.

Does Robinhood offer MASI?

Yes. Robinhood offers MASI as a regular exchange-listed security.

Does Fidelity offer MASI?

Yes. Fidelity offers MASI as a regular exchange-listed security.

Does Webull offer MASI?

Yes. Webull offers MASI as a regular exchange-listed security.

Is MASI optionable?

Yes. MASI has listed options contracts. Per-contract pricing varies by broker — see the Options column in the matrix.

Is there a tokenized version of MASI?

Not in our current dataset. The tokenized stock universe (Kraken xStocks, Binance Alpha/Ondo, Robinhood EU, Hyperliquid HIP-3) is expanding quickly — we refresh quarterly.

Can I buy a fractional share of MASI?

Yes. Multiple brokers in the matrix support fractional shares for MASI — see the Fractional column above for per-broker eligibility and minimums.