Pasithea Therapeutics, FOXO Technologies, and Marin Software are the 3 Penny Stocks to watch on May 8, 2025, based on TipRanks’ Penny Stock Screener tool. Penny stocks are defined as stocks that trade at or below $5 per share and have a market capitalization of below $300 million.
The Penny Stock Screener helps investors scan stocks based on numerous parameters, including Sector, Price Target Upside, Smart Score, Analyst Consensus, Dollar Volume, and Price Change.
We leveraged the tool to pick the top three penny stocks with the highest Dollar Volume as of the close on May 7, 2025. Simply put, Dollar Volume is the number of shares traded on a particular day multiplied by the day’s share price.

Pasithea Therapeutics (KTTA) – Pasithea Therapeutics is a clinical-stage biotechnology company engaged in developing novel treatments for central nervous system (CNS) disorders and RASopathies. On May 7, KTTA stock had a Dollar Volume of $343.41 million, while its stock price plunged by 25.7%.
Yesterday, the company announced the closing of a $5 million public offering. The offering comprised a common stock, prefunded warrants, Series C warrants, and Series D warrants, all priced at $1.40 per share. The company intends to use the net proceeds from the offering for general corporate purposes, including ongoing research and pre-clinical studies, acquisitions, and licensing activities.
FOXO Technologies (FOXO) – FOXO Technologies is a holding company that operates through three units: Foxo Labs, a biotechnology company, Myrtle Recovery Centers, a behavioral health facility, and Rennova Community Health, an operator of hospitals. FOXO had a Dollar Volume of $321.13 million yesterday, accompanied by a stock price decline of 52.9%.
The stock price decline seems to be a reversal from the prior day’s surge. On May 6, FOXO stock skyrocketed over 153%, after the company announced that its Myrtle Recovery Centers have reached a key patient care milestone of over 400 patients and has served patients for over 5,000 care days. The management is confident that Myrtle will have served 10,000 patient care days by year end 2025 since inception.
Marin Software (MRIN) – Marin Software is a cloud-based digital marketing company that offers AI-backed software solutions for targeted advertising. On May 7, MRIN had a Dollar Volume of $97.54 million, while its stock price remained nearly stable. However, its stock price is trending lower in pre-market trading, down 8.7% at the time of writing.
There was no specific news for Marin Software yesterday. However, on May 6, Marin announced a series of strategic and operational developments, including the plan for dissolution, putting an end to Marin Software’s legal entity status. MRIN stock skyrocketed over 116% on the news on Tuesday.
To find more penny stocks like these, you can take a look at TipRanks’ Penny Stock Screener tool. It shows a list of all penny stocks, their price movement, and other vital data.