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ATOSAtossa Therapeutics, Inc.
$1.98$17M
Overview & Verdict
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HomeStocksATOSCash Flow

Atossa Therapeutics, Inc. (ATOS) Cash Flow Statement

17Y historyFree accessUpdated daily

The firm continues to burn cash at an unsustainable rate, with free cash flow deficits reaching $10.5 million in 2025Q4, necessitating potential future equity dilution to sustain operations.

ATOS Cash Flow Statement

Income StatementBalance SheetCash FlowRatios
AnnualQuarterly
MetricTTMDec'25Dec'24Dec'23Dec'22Dec'21Dec'20Dec'19Dec'18Dec'17Dec'16Dec'15Dec'14Dec'13Dec'12Dec'11Dec'10Dec'09
Cash from Operations-33.38M-29.76M-21.03M-20.94M-20.76M-16.47M-11.57M-9.13M-8.96M-6.59M-5.37M-13.95M-10.56M-8.83M-3.9M-3.49M-358.11K-75.18K
Operating CF Margin %------------793702.84%-26297.9%-1395.93%-809.39%-232824.27%--
Operating CF Growth %-196.88%-41.52%-0.43%-0.87%-26.03%-42.36%-26.75%-1.86%-35.91%-22.69%61.48%-32.19%-19.54%-126.41%-11.67%-875.22%-376.36%-
Net Income-37.64M-34.77M-25.5M-30.09M-26.96M-20.61M-17.83M-17.24M-11.4M-8.12M-6.37M-12.76M-14.66M-10.78M-5.08M-3.44M-1.09M-122.86K
Depreciation & Amortization16K16K17K23K8K23K46.52K52.79K44.2K128.99K303.48K272.63K564.46K472.93K130.55K15.62K00
Stock-Based Compensation2.08M2.65M2.29M4.62M6.79M5.27M3.02M8.84M2.46M786.55K876.19K840.1K698.66K1.44M121.81K140.06K30.4K0
Deferred Taxes0000002.36M00760.16K-712.86K-3.47M-489.37K663.1K-91.93K3.53M00
Other Non-Cash Items722K01.72M2.99M3K0939.2K5.81K0192.82K1.6M840.1K3.05M389.77K121.81K-3.44M73K0
Working Capital Changes1.44M2.35M448K1.52M-599K-1.16M-111.35K-791.3K-64.41K-339.89K-1.07M326.1K277.45K-1.01M897.64K-297.8K625.42K47.68K
Change in Receivables000743K329K-437K104.72K-221.56K-159.82K-358.28K0321.05K-368.17K-352.27K-140.44K-1.22K00
Change in Inventory0-983K-611K2.54M-329K437K-104.72K00009.28K-39.79K-149.95K-29.88K-92.03K00
Change in Payables1.4M3.61M-127K-2.16M1.25M128K1.3M-60.16K18.43K80.58K-560.13K301.4K346.21K-58.58K3.45K64.77K00
Cash from Investing-14K-23K-19K-14K-4.73M-9K-9.37K-7.63K-110.91K0-9.21K-288.42K-343.26K-489.81K-134.58K-136.93K00
Capital Expenditures-14K-23K-19K-14K-27K-9K-9.37K-7.63K-110.91K0-9.21K-130.74K-343.26K-489.81K-134.58K-136.93K00
CapEx % of Revenue-----------7436.58%855.19%77.43%27.93%9128.73%--
Acquisitions000000000000000000
Investments------------------
Other Investing00000000000-157.68K000000
Cash from Financing003.67M-1.48M0113.3M38.55M11.34M12.29M10.78M4.7M9.46M13.06M13.94M3.85M5.53M284K159.54K
Debt Issued (Net)000000000000-98.48K0-5.08K-183.92K182K5K
Equity Issued (Net)003.67M-1.48M069.67M38.57M11.34M12.29M10.03M4.7M9.46M13.16M13.94M3.85M5.71M102K154.54K
Dividends Paid000000000000000000
Share Repurchases000-1.48M00000000000000
Other Financing0000043.64M-13.82K00749.23K00000000
Net Change in Cash-33.4M-29.79M-17.38M-22.43M-25.49M96.82M26.97M2.2M3.22M4.19M-687.93K-4.78M2.16M4.62M-185.62K1.9M-74.11K84.36K
Free Cash Flow-33.4M-29.79M-21.05M-20.95M-20.79M-16.48M-11.58M-9.14M-9.07M-6.59M-5.38M-14.08M-10.9M-9.32M-4.03M-3.63M-358.11K-75.18K
FCF Margin %------------801139.42%-27153.09%-1473.36%-837.32%-241953%--
FCF Growth %-49.68%-41.5%-0.45%-0.81%-26.13%-42.33%-26.75%-0.7%-37.59%-22.48%61.77%-29.23%-16.94%-131%-11.17%-913.46%-376.34%-
FCF per Share-3.87-3.46-2.51-2.49-2.46-2.11-15.36-16.13-32.73-101.47-328.80-1337.64-1224.16-1625.08-874.79-1074.71-161.02-22.21
FCF Conversion (FCF/Net Income)0.89x0.86x0.82x0.70x0.77x0.80x0.65x0.53x0.79x0.81x0.84x0.89x0.72x0.82x0.77x1.01x0.33x0.61x
Interest Paid000000000000000000
Taxes Paid00000000000000002500

Key Metrics

Growth RegimeContracting
ProfitabilityNegative
Balance SheetAdequate
Cash FlowBurning
Top Statement Risk

Clinical trial funding dependency

Verified Source

Metrics are mathematically derived from official filings.

SEC 10-K (2026Q1)

Earnings Quality and Cash Divergence

According to the provided financial data, the OCF/NI ratio has fluctuated significantly, reaching 1.00 in 2026Q1, which suggests that the company's reported net losses are closely tracking actual cash outflows as the firm lacks the non-cash revenue streams that typically create a gap between accounting and cash.

The alignment between net income and operating cash flow is a direct consequence of the company's pre-revenue status, where expenses are almost entirely cash-based. Investors should monitor this relationship, as any future divergence would likely indicate the introduction of non-cash accounting items or changes in working capital management rather than operational profitability.

Persistent Free Cash Flow Deficits

As reported in financial statements, Atossa Therapeutics has consistently generated negative free cash flow, with quarterly outflows reaching $10.5 million in 2025Q4, highlighting the company's total reliance on external capital to sustain its ongoing clinical research and development activities without any offsetting commercial revenue generation.

The trajectory of free cash flow remains deeply negative, reflecting the high fixed costs associated with clinical trial execution. This trend appears unlikely to reverse until the company achieves a major licensing milestone or regulatory approval, necessitating continued scrutiny of the remaining cash runway.

Volatile Working Capital Impact

Based on reported figures, working capital changes have been highly erratic, swinging from a $1.9 million inflow in 2025Q3 to a $1.5 million outflow in 2024Q4, which suggests that the company's cash position is sensitive to the timing of vendor payments and clinical trial-related accruals.

These fluctuations in working capital appear to be driven by the timing of payments to clinical research organizations rather than underlying operational efficiency. Analysts should interpret these swings as temporary timing differences that do not alter the fundamental reality of the company's ongoing cash burn.

SBC Obscures True Cash Burn

As indicated by the company's cash flow statements, stock-based compensation has been a consistent feature, peaking at $796,000 in 2025Q2, which effectively masks the true economic cost of operations by substituting equity for cash to retain talent during the critical Phase II development phase.

While stock-based compensation preserves immediate liquidity, it represents a real cost to shareholders through dilution. Investors should adjust their cash burn models to account for this non-cash expense, as it suggests that the company's operational costs are higher than the headline cash flow figures imply.

ATOS — Frequently Asked Questions

Quick answers to the most common questions about buying ATOS stock.

How much cash does Atossa Therapeutics, Inc. (ATOS) generate from operations?

Atossa Therapeutics, Inc. (ATOS) generated $-29.8M in net cash from operating activities in 2025. This reflects the cash generated directly from core business operations.

What is Atossa Therapeutics, Inc.'s free cash flow?

Atossa Therapeutics, Inc. (ATOS) reported negative free cash flow of $29.8M in 2025, indicating capital requirements exceeded cash from operations.

What is Atossa Therapeutics, Inc.'s capital expenditure (CapEx)?

Atossa Therapeutics, Inc. (ATOS) spent $0.0M on capital expenditures in 2025. CapEx represents the cash invested in physical assets like property, plant, and equipment to maintain or grow the business.