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Atossa Therapeutics, Inc. (ATOS)

NASDAQ

$2.51

$-0.02

(-0.79%)

Previous Close: ⁦$2.53⁩

Market Closed

Atossa Therapeutics, Inc. (ATOS) Live Price Chart

Last updated: ⁦2026-09-06 21:42:40⁩. Prices reflect the latest closing data and will resume updating on the next trading day. Stock price data is sourced from Massive.

Summary

Atossa Therapeutics, Inc. (ATOS) operates in the PHARMACEUTICAL PREPARATIONS sector and is listed on NASDAQ. The stock is currently priced at $2.51, with a market capitalization of $24.55M and a P/E ratio of --. Over the past 52 weeks, its price has ranged from $1.70 to $19.35. This page covers its latest market performance, valuation, price trends and company information.

Key Market Data

Market Cap	$24.55M
Open	$2.51
Day's High	$33,480.00
Day's Low	$1.70
Previous Close	$2.53
Volume	27.37K
Average Volume	--
P/E Ratio	--
52-Week High	$19.35
52-Week Low	$1.70
Dividend Yield	--
Earnings Date	--

Atossa Therapeutics, Inc. (ATOS) Latest Closing Stock Price

Atossa Therapeutics, Inc. (ATOS) last closed at $2.53 as of 2026-09-04 23:31:00, unchanged from the previous close of $2.53.

During the latest regular trading session, ATOS traded between $1.70 and $33,480.00, with a volume of 27.37K shares. The closing price was near the lower end and near the lower end of its 52-week range.

Atossa Therapeutics, Inc. (ATOS) 7-Day Stock Price Change

Over the past seven days, Atossa Therapeutics, Inc. (ATOS) moved from $2.57 to $2.51, representing a decline of 2.33% ($0.06).

The stock traded between $2.50 and $2.58 during the period. The latest price is near the lower end of the 7-day range, indicating moderate downward.

The average daily volume was 49.54 thousand shares, down versus the previous seven-day period, indicating lower trading activity.

ATOS 52-Week Price Position

Position in Range: 4.6%

52W Low$1.70

52W High$19.35

ATOS is currently trading at $2.51, placing it 4.6% of the way from its 52-week low of $1.70 to its 52-week high of $19.35. This percentage reflects the stock's relative position within its 52-week trading range, not its valuation or future performance.

What is Atossa Therapeutics, Inc. (ATOS)?

Atossa Therapeutics Inc is a clinical-stage biopharmaceutical company engaged in the development of proprietary medicines for oncology, with a focus on breast cancer and related conditions. The company's lead product candidate, oral (Z)-endoxifen, is a selective estrogen receptor modulator and degrader (SERM/SERD) in Phase 2 clinical development, being evaluated for the treatment and prevention of breast cancer and other indications.

Atossa Therapeutics, Inc. Information

Industry	PHARMACEUTICAL PREPARATIONS
Employees	14
Exchange	NASDAQ
Company Website	https://www.atossatherapeutics.com

How to Buy Atossa Therapeutics, Inc. (ATOS) Stock on MEXC

Eligible investors can buy real shares of Atossa Therapeutics, Inc. (ATOS) through MEXC RealStocks. Follow these three steps to open a RealStocks account, transfer USDT, and place a US stock order.

Step 1: Open and Verify Your RealStocks Account

Log in to the MEXC App, go to Trade → RealStocks, and select Open Account. Complete the required account-opening and identity verification process with MEXC's partner licensed broker.

Step 2: Transfer USDT to Your RealStocks Account

Go to Wallets → RealStocks and transfer USDT from your Spot Account to your RealStocks Account. RealStocks are quoted in USD, while account funding can be completed using USDT.

Step 3: Search for ATOS and Place Your Order

Open the RealStocks trading page and search for ATOS. Select a market or limit order, enter the price and quantity as required, review the order details, and submit your order. Once filled, the corresponding real shares will be held in your RealStocks Account.

Frequently Asked Questions (FAQ)

1.What is Atossa Therapeutics, Inc. (ATOS) stock price today?

Atossa Therapeutics, Inc. (ATOS) is currently trading at $ 2.51, down 0.79% ($0.02) from the previous close of $ 2.53. Intraday prices update in real time during regular trading hours.

2.Is ATOS stock going up or down today?

As of 2026-09-04 23:31:00, ATOS is trading at $ 2.51, down 0.79% ($0.02) from its previous close of $ 2.53. The stock has traded between $ 1.70 and $ 33,480.00 during today’s regular session. Past price movements do not guarantee future results.

3.What is ATOS pre-market price?

As of 2026-09-04 23:31:00, ATOS is trading at $ 2.53 in pre-market trading, down 0.20% ($0.00) from the previous close of $ 2.53. Pre-market prices reflect trading activity before the regular session opens and may experience lower liquidity and higher volatility.

4.What is ATOS after-hours price?

As of 2026-09-04 23:31:00, ATOS is trading at $ 2.51 in after-hours trading, down 0.99% ($0.02) from the regular-session close of $ 2.53. After-hours prices may differ from the regular session’s opening price due to lower liquidity and wider bid-ask spreads.

5.Is ATOS stock trading now?

ATOS trades on the NASDAQ exchange during regular hours, Monday through Friday, 9:30 AM to 4:00 PM ET, excluding public holidays. Pre-market and after-hours trading are also available through select brokers outside these hours.

6.Where does ATOS sit relative to its 52-week high and low?

Over the past 52 weeks, ATOS has traded between a low of $ 1.70 and a high of $ 19.35. At $ 2.51, the stock is positioned 4.6% of the way from its 52-week low to its 52-week high, providing context for its current price within the one-year trading range.

7.What sector is Atossa Therapeutics, Inc. in?

Atossa Therapeutics, Inc. (ATOS) operates in the PHARMACEUTICAL PREPARATIONS sector. Sector classification helps investors compare it with companies exposed to similar market trends and competitive conditions.

8.What is Atossa Therapeutics, Inc.'s market capitalization and where is it listed?

Atossa Therapeutics, Inc. is listed on the NASDAQ exchange with a market capitalization of $ 24.55M. Market cap reflects the total market value of all outstanding shares and is commonly used to classify stocks by size.

9.How is ATOS valued in terms of P/E ratio and EPS?

ATOS trades at a P/E ratio of --, based on trailing-twelve-month EPS of $ -3.78. P/E ratio compares the stock price to earnings per share and is a common starting point for assessing valuation relative to peers.

10.Does Atossa Therapeutics, Inc. pay a dividend?

Atossa Therapeutics, Inc. pays an indicated annual cash dividend of $ 0.00 per share, with a current dividend yield of 0.00% based on the latest share price. Dividend policies are subject to change at the board's discretion.