Top Stock Gainers August 2025 - Monthly Performance Ranked
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2 stocks are withheld from this ranking because their price history is under review.
The gain covers the period; price, market cap, sector and country show each company as it is today.
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Over August 2025, 71% of the 4,008 ranked companies finished higher and the median move was +4.2%; Basic Materials led on median (+10.1%) and Utilities lagged (+0.7%). The S&P 500 fund (SPY) moved +2.05% between its Jul 31, 2025 and Aug 29, 2025 closes. A company that began trading during the period is measured from its first close, over a shorter window.
Best performing large-cap stocks in August 2025
August 2025 Stock Market Momentum
This page answers a question about a finished month with data: which US-listed stocks posted the strongest price gains in August 2025. The ranking is based on observed market performance, not analyst ratings, price targets, or investment recommendations.
Use the list to research momentum, market breadth, sector strength, and catalysts behind large moves. Before acting on any stock, review the company's news, SEC filings, liquidity, volatility, and your own risk constraints.
Among the 4,008 NYSE, Nasdaq and NYSE American stocks currently eligible for this ranking, CNTN (Canton Strategic Holdings, Inc.) has the highest gain in August 2025 with +378%. Following are EQ (+345%) and MENS (+188%).
This ranking shows the top performing stocks and biggest stock gainers of August 2025, measured from the last close of July to the last close of August.
Monthly performance rankings can reveal price strength, sustained momentum, sector rotation, and event-driven moves that are not visible in one-day movers lists. The table is informational only and does not recommend any stock to buy, sell, or hold.
What this ranking covers
- Universe
- US-listed companies on NYSE, Nasdaq and NYSE American.
- Floors
- Market cap of at least $100 million, and at least one close inside the month.
- Exclusions
- Stocks whose price history is under review are withheld, and their count is stated above.
- Measured on
- Split-adjusted closes, from the last close of the previous month to the last close of this one.
- Refreshed
- Rebuilt once the session behind those closes has settled. The date above the table names that session, not the moment the table was written. A gain dated earlier than the board date uses the last close stored for that stock.
Frequently Asked Questions
Q Which stock has gained the most in August 2025?
CNTN (Canton Strategic Holdings, Inc.) has the highest monthly gain in this ranking for August 2025, with a gain of 378%. Top performers include CNTN, EQ, MENS.
Q What stocks gained the most in August 2025?
The biggest gainers in August 2025 were: CNTN (+378%), EQ (+345%), MENS (+188%), ONDS (+176%), PGEN (+164%). These monthly rankings show which stocks had the strongest short-term momentum.
Q Does this page recommend the best stocks to buy now?
No. This page is an informational ranking of stocks that have already gone up during August 2025. It does not make buy, sell, or hold recommendations and should be used as a research starting point, not financial advice.
Q How can this ranking help explain current stock market trends?
The ranking shows where price strength is concentrated during August 2025. Comparing the top gainers by sector, market cap, and recent catalysts can help identify momentum themes and market rotation without implying that any listed stock is a recommendation.
Q Which companies does this ranking include?
4,008 companies with a market capitalization above $100 million traded on NYSE, Nasdaq and NYSE American, each with at least one trading day inside August 2025. One close inside the month is enough to qualify, so a company that listed during the month is ranked on the part of it that it traded.
Q Which sectors performed best in August 2025?
The five highest-gaining companies in August 2025 sit in Healthcare and Technology, with the leader CNTN in Healthcare. That describes the top of this list, not a sector ranking; the market-context strip under the table reports the median move of each sector's ranked companies.
Q How is monthly stock performance calculated?
Each gain runs from the last split-adjusted close of the previous month to the last close of the month. A company whose trading history begins inside the month is measured from its first close.
Q Where can I find today's top stock gainers and most active stocks?
This page ranks stocks by their full-month performance in August 2025. For today's top stock gainers, real-time stock movers, and the most active stocks right now, visit our Momentum Scanner, which tracks live intraday activity across US-listed symbols.
Understanding Monthly Stock Performance
Monthly performance rankings reveal short-term momentum patterns and help identify stocks experiencing rapid price movements:
- Momentum Research: Stocks showing strong monthly performance can help identify where market attention and price strength are concentrated.
- Sector Rotation: Monthly rankings can reveal which sectors are gaining favor with investors and where market leadership is shifting.
- Event-Driven Moves: Earnings releases, product launches, and regulatory approvals often create significant monthly price movements.
Using Monthly Data Effectively
- Combine Timeframes: Compare monthly gainers with 52-week and YTD performance to identify stocks with both short and long-term momentum.
- Research the Catalyst: Investigate why top monthly performers moved significantly. The reason for the move matters as much as the percentage gain.
- Watch for Reversals: Extreme monthly gains sometimes precede corrections, so treat the ranking as a research starting point rather than a buy list.
Evaluate Your Positions
Researching one of this month's top movers? Use our Stock Return Calculator to review historical performance, or the Position Size Calculator to model position sizing and risk before making your own decision.