What is Altimmune, Inc. (ALT) stock price today?

Altimmune, Inc. (ALT) is currently trading at $2.60, down 2.26% today.

What is ALT P/E ratio?

Altimmune, Inc.'s P/E ratio is -3.42. This is below the market average, suggesting the stock may be undervalued relative to earnings.

What is ALT return on equity (ROE)?

Altimmune, Inc.'s return on equity (ROE) is -31.41%, indicating how efficiently the company generates profit from shareholders' equity. This is below the typical market average of 12-15%.

What is Altimmune, Inc.'s market cap?

Altimmune, Inc. has a market capitalization of $505.63M.

NASDAQ · Biotechnology

Altimmune, Inc. (ALT) Stock

$2.60 -2.26% NASDAQ: ALT Healthcare

Valuation

Metric	Value
Price	$2.60
Market Cap	$505.63M
P/E Ratio	-3.42
P/B Ratio	1.04
P/S Ratio	16749.86
EPS (TTM)	$-1.32
52-Week High	$6.44
52-Week Low	$2.56
Dividend Yield	0.00%

Financials & Margins

Metric	Value
ROE	-31.41%
ROA	-17.40%
ROCE	-19.47%
Gross Margin	—
Operating Margin	—
Net Margin	-2530.03%
Debt/Equity	0.08
Current Ratio	18.53

Annual Financials (USD)

Metric	2021	2022	2023	2024	2025
Revenue	$4.0M	$0	$0	$0	$0
Operating Profit	$-97.0M	$-88.0M	$-96.0M	$-103.0M	$-94.0M
Net Profit	$-97.0M	$-85.0M	$-88.0M	$-95.0M	$-88.0M
EPS	$-2.35	$-1.81	$-1.66	$-1.34	$-1.00
Op Margin	-2197.6%	129029.4%	-22518.5%	-515860.0%	-230461.0%

Balance Sheet (USD)

Metric	2021	2022	2023	2024	2025
Total Assets	$219.0M	$207.0M	$211.0M	$139.0M	$280.0M
Total Liabilities	$20.0M	$22.0M	$17.0M	$16.0M	$55.0M
Cash	$190.0M	$111.0M	$135.0M	$37.0M	$44.0M
Borrowings	$2.0M	$1.0M	$1.0M	$2.0M	$36.0M

Latest News

US Research house initiates Solvonis coverage citing differentiated addiction strategy Proactive · Jul 13, 2026 Leerink Sees Altimmune (ALT) As An Attractive Play In The MASH Therapeutics Market Insider Monkey · Jul 5, 2026 Zacks Industry Outlook Indivior, Aurinia, Ironwood, Altimmune and Marker Zacks · Jun 26, 2026 5 Small Drug Stocks to Invest in Amid a Biotech Comeback Zacks · Jun 25, 2026 Is Altimmune, Inc. (ALT) Still a Buy After Price Target Reduction to $20? Insider Monkey · Jun 24, 2026

Cash Flow (USD)

Metric	2021	2022	2023	2024	2025
Operating Cash Flow	$-78.0M	$-63.0M	$-76.0M	$-80.0M	$-68.0M
Investing Cash Flow	$75.0M	$-74.0M	$14.0M	$-28.0M	$-132.0M
Financing Cash Flow	$0	$0	$0	$0	$-1.0M
Net Cash Flow	$74.0M	$-79.0M	$24.0M	$-98.0M	$7.0M
Free Cash Flow	$-91.0M	$-63.0M	$-76.0M	$-80.0M	$-68.0M

Valuation & Return Ratios

Metric	Value
PEG Ratio	-0.08
EV / EBITDA	-5.31
FCF Yield	-14.74%
Quick Ratio	26.78
Interest Coverage	-28.34
Return 1Y	-33.80%
Return 3Y	-8.09%
Return 5Y	-66.01%

Ownership

Insiders Held0.41%

Institutions Held58.06%

Institutions Float Held58.30%

Institutional Holder	Shares	Report Date
Blackrock Inc.	12,795,277	2026-03-31
State Street Corporation	7,145,550	2026-03-31
Vanguard Capital Management LLC	5,658,049	2026-03-31
Vanguard Portfolio Management LLC	5,382,002	2026-03-31
Marshall Wace LLP	4,017,901	2026-03-31

Peer Comparison

Ticker	Price	Change	P/E	Market Cap	Div Yield
AAPLApple Inc.	$340.42	+1.11%	38.93	$5.00T	0.32%
MSFTMicrosoft Corporation	$522.61	-1.35%	28.68	$3.88T	0.76%
GOOGLAlphabet Inc.	$348.29	-0.63%	16.94	$4.22T	0.26%
AMZNAmazon.com, Inc.	$254.06	-2.25%	19.82	$2.73T	0.00%
METAMeta Platforms, Inc.	$720.89	-0.06%	27.93	$1.84T	0.28%

About Altimmune, Inc.

Altimmune, Inc. is led by CEO Jerome Benedict Durso, employs 59 people, headquartered in US, publicly traded since 2017.

Altimmune, Inc. (ALT) stock trades at $2.60 with a market capitalization of $505.63M. The stock is valued at a price-to-earnings (P/E) ratio of -3.42, price-to-book of 1.04, price-to-sales of 16749.86. Over the past 52 weeks the stock has ranged between $2.56 and $6.44, and currently trades 59.6% below its 52-week high.

On profitability, Altimmune, Inc. generates a return on equity (ROE) of -31.41%, return on capital employed of -19.47%, a net profit margin of -2530.03%.

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