What is Altimmune's shares (diluted)?

Altimmune (ALT) reported shares (diluted) of 124.5M in Q1 2026.

How has Altimmune's shares (diluted) changed year-over-year?

Altimmune's shares (diluted) increased by 64.7% year-over-year, from 75.5M to 124.5M.

What is the long-term trend for Altimmune's shares (diluted)?

Over 4 years (2021 to 2025), Altimmune's shares (diluted) has grown at a 19.7% compound annual growth rate (CAGR), from 162.9M to 334.5M.

What does shares (diluted) mean?

The weighted-average shares outstanding plus all potentially dilutive shares from stock options, RSUs, convertible securities, and warrants, using the treasury stock method.

Altimmune ALT Shares (Diluted)

Shares (Diluted) at other companies

Eli LillyLLY

895.9M-0.5%

Madrigal Pharmaceuticals, Inc.MDGL

29M+3.4%

Viking TherapeuticsVKTX

115.6M+3.1%

Wave Life SciencesWVE

200.2M+23.1%

Delcath SystemsDCTH

36M-8.8%

MeiraGTx Holdings plcMGTX

81.3M+2.9%

Other financials

Income statement

See full

Revenue$26.0K+420%

Operating income-$24.2M-11.1%

Net income-$22.6M-15.3%

EPS (diluted)-$0.18+30.8%

Balance sheet

See full

Cash & equivalents$97.6M+98.7%

Total debt$34.8M+14,092%

Total equity$284.0M+99.8%

Total assets$335.6M+113%

Cash flow

See full

Operating cash flow-$20.9M-24.4%

CapEx$21.0K—

Free cash flow-$21.0M—

Valuation

See full

Market cap$558.14M-2.1%

Enterprise value$495.27M-5.0%

P/S13,613.2×-24,380×

Profitability

See full

Operating margin-230,461%-82,087pp

Net margin-214,861%-76,057pp

FCF margin-17,806.8%-110,030pp

Returns & leverage

See full

Return on equity-42.7%-8.7pp

Debt / equity0.1×+0.1×

Current ratio29.6×+13.7×

Where this comes from

Reported directly by Altimmune in its filing.

Tagged under the XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding.

The official record: Altimmune’s 10-Q, filed May 13, 2026, on SEC EDGAR. View the filing →

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Questions, answered.

What is Altimmune's shares (diluted)?: Altimmune (ALT) reported shares (diluted) of 124.5M in Q1 2026.
How has Altimmune's shares (diluted) changed year-over-year?: Altimmune's shares (diluted) increased by 64.7% year-over-year, from 75.5M to 124.5M.
What is the long-term trend for Altimmune's shares (diluted)?: Over 4 years (2021 to 2025), Altimmune's shares (diluted) has grown at a 19.7% compound annual growth rate (CAGR), from 162.9M to 334.5M.
What does shares (diluted) mean?: The weighted-average shares outstanding plus all potentially dilutive shares from stock options, RSUs, convertible securities, and warrants, using the treasury stock method.