12 Best Penny Stocks Under $1 to Buy Now

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4. Mersana Therapeutics Inc. (NASDAQ: MRSN)

Share Price as of July 22: $0.37

Number of Hedge Fund Holders: 13

Mersana Therapeutics Inc. (NASDAQ:MRSN) is one of the best penny stocks under $1 to buy now. Earlier in June, Mersana Therapeutics presented additional positive interim Phase 1 clinical data for emiltatug ledadotin (Emi-Le; XMT-1660) at the American Society of Clinical Oncology/ASCO 2025 Annual Meeting in Chicago, Illinois. Emi-Le is the company’s B7-H4-directed Dolasynthen ADC.

The presentation focused on data from Emi-Le’s Phase 1 dose escalation and backfill cohorts, with a data cut-off of March 8, 2025. These cohorts included patients with triple-negative breast cancer/TNBC, hormone-receptor-positive and human epidermal growth factor receptor 2-negative breast cancer, ovarian cancer, endometrial cancer, and adenoid cystic carcinoma type 1 (ACC-1).

The safety and tolerability profile of Emi-Le, as of the March 8, data cut-off, was consistent with initial data reported in January this year, with no new safety signals observed. Mersana Therapeutics is focusing its initial expansion work on patients with TNBC who have been previously treated with a topoisomerase-1 inhibitor ADC, recognizing this as a population with high unmet need.

Mersana Therapeutics Inc. (NASDAQ:MRSN) is a clinical-stage biopharmaceutical company that develops antibody-drug conjugates/ADC for cancer patients with unmet needs.

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