CTMX stock jumps 56 percent on earnings-driven buying

Published on 09/18/2026 at 20:07 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

CTMX stock surged 56 percent in the latest session on September 18, 2026. Robinhood showed a USD 2.81 quote, a USD 611.21 million market cap and a 52-week range of USD 1.94 to USD 8.21.

CTMX, US23284F1057, Illustration mit AI erstellt.

CytomX Therapeutics stock (CTMX) surged 56 percent in the latest session, and Robinhood showed a USD 2.81 quote, a market capitalization of USD 611.21 million and a 52-week range of USD 1.94 to USD 8.21 on September 18, 2026.

Move and range

Robinhood also listed volume at 610.18K and average volume at 3.79 million, which puts the session far below normal turnover even after the jump. The same quote page showed a daily high of USD 2.86 and a low of USD 2.77.

That leaves CTMX trading near the lower end of its one-year band despite the sharp move. For investors, the distance to the USD 8.21 high is the number that matters most.

Trading level

The stock's current level is still only a small fraction of the 52-week high, and the move was large enough to pull the quote away from the low of USD 1.94. A first.

Robinhood's market-cap figure of USD 611.21 million gives the rally more context than the percentage move alone. The shares are still a small-cap biotech name, which makes every trading day more sensitive to positioning.

Where it stands

The price was USD 2.81 as of September 18, 2026, with volume at 610.18K. The session range of USD 2.77 to USD 2.86 shows a tight band after the opening surge.