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How to Buy Compass Therapeutics, Inc. Common Stock (CMPX) Stock

Compare 15 brokers offering CMPX, check 24-hour trading availability, see options pricing, and confirm OTC tier access.

CMPX
$0.0000−$1.89 (−100.00%)
Day range
$1.85 – $1.90
52-week range
$1.61 – $6.88
Volume
256.1K
Market cap
$340.37M
Exchange
XNAS
Asset class
common
Optionable
Yes
24-hour trading
Yes
Fractional eligible
Yes
Tokenized
No
Market cap tier
small

Where to buy CMPX

15 brokers in our matrix offer CMPX (penny/OTC-friendly subset). Verify availability and current fees with each broker before trading.

BrokerCommissionFractionalExtendedOvernightOptionsOTCQXOTCQBPink Cur.Pink Ltd.GreySurchargeShort locate
Firstrade logoFirstradeReview$0
~4,000+ tickers, ≥ $5
~1,200
$0FullFullFullFullLimited—limited
Interactive Brokers logoInteractive BrokersReview$0 (Lite) / per-share (Pro)
~10,000
per-contract pricingFullFullFullFullFullPer-share pricing appliesbest
TradeStation logoTradeStationReview$0 listed
$0.50 / $0.60FullFullFullFullLimited$0.005/share OTC (TS Select/TS Go), $0 up to 10,000 sharesstrong
Charles Schwab (thinkorswim) logoCharles Schwab (thinkorswim)Review$0
Schwab Stock Slices, S&P 500 only, ≥ $5/slice, up to 30 at once
~1,130
$0.65FullFullFullLimitedLimitedVariable service fees on certain restrictedmoderate
E*TRADE (Morgan Stanley) logoE*TRADE (Morgan Stanley)Review$0 listed
~20
$0.65FullFullFullFullLimited$6.95 flat on penny stocksmoderate
Fidelity logoFidelityReview$0
Stocks by the Slice, 7,000+ stocks/ETFs, from $1
$0.65FullFullNoNoNo—limited
Merrill Edge logoMerrill EdgeReview$0
$0.65FullFullFullLimitedNo—none
Moomoo logoMoomooReview$0
$0LimitedLimitedLimitedNoNo—limited
Public.com logoPublic.comReview$0
rebate modelLimitedLimitedLimitedNoNo—none
SoFi Active Investing logoSoFi Active InvestingReview$0
$0FullLimitedLimitedNoNo—none
tastytrade logotastytradeReview$0 stocks
$1.00 open, $0 close (capped at $10 per leg)LimitedLimitedLimitedNoNo—limited
Webull logoWebullReview$0
$0LimitedLimitedLimitedNoNo—limited
CenterPoint Securities logoCenterPoint SecuritiesReviewPer-share (day-trader oriented)
per-contractFullFullFullFullFullPer-sharebest
Cobra Trading logoCobra TradingReviewPer-share (day-trader oriented)
per-contractFullFullFullFullFullPer-sharebest
SpeedTrader logoSpeedTraderReviewPer-share (day-trader oriented)
per-contractFullFullFullFullFullPer-sharebest

24-Hour / Overnight trading

CMPX 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.

Overnight sessions route through ATSs, typically have wider spreads, accept limit orders only, and offer no guaranteed fills.

Penny stock / OTC routing

CMPX trades on the OTC markets. Broker support varies sharply by tier (OTCQX, OTCQB, Pink Current, Pink Limited, Grey). Fidelity and Robinhood exclude pink/grey entirely. For short-locate on small-caps, Interactive Brokers and the day-trader specialists (Cobra Trading, SpeedTrader, CenterPoint) have the deepest inventory.

About Compass Therapeutics, Inc. Common Stock

Compass Therapeutics Inc is a clinical-stage oncology-focused biopharmaceutical company that develops proprietary antibody therapeutics to engage the immune system to treat multiple human diseases. The company's scientific focus is on the relationship between angiogenesis, the immune system, and tumor growth. It is engaged in drug discovery by leveraging its proprietary antibody discovery engine to target the immune system and identify optimal combinations empirically broadly. Through StitchMabs and common light chain platforms, these combinatorial insights can be rapidly translated into tailored bispecifics with monoclonal-like manufacturability. Its pipeline is comprised of the following product candidates; CTX-009, CTX-471, CTX-10726, VEGF-A, Bispecific, and CTX-8371.
Sector
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
Employees
39
Headquarters
BOSTON, MA
Listed
2020-11-13
Market cap
$340.37M

Frequently asked

Where can I buy Compass Therapeutics, Inc. Common Stock (CMPX)?

CMPX is offered by 15 brokers in our matrix, including Firstrade, Interactive Brokers, TradeStation, Charles Schwab (thinkorswim), E*TRADE (Morgan Stanley). Compare commissions, fractional eligibility, and overnight availability in the broker matrix above.

Can I buy CMPX after hours or overnight?

Yes. CMPX 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 CMPX?

No. Robinhood does not provide access to the OTC tier CMPX trades on. Interactive Brokers, TradeStation, and Firstrade have the broadest OTC coverage.

Does Fidelity offer CMPX?

Partial. Fidelity's OTC access is tier-limited — see the OTC columns in the matrix to check whether CMPX's specific tier is supported.

Does Webull offer CMPX?

Partial. Webull's OTC access is tier-limited — see the OTC columns in the matrix to check whether CMPX's specific tier is supported.

Is CMPX optionable?

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

Is there a tokenized version of CMPX?

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 CMPX?

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