Anthropic H1 2026: net loss driven by fair-value remeasurement

Anthropic’s H1 2026 net loss was exceptionally large mainly because of huge non-cash fair-value losses below the operating line, not because the core business suddenly became deeply loss-making. In fact, operating performance improved sharply, but that was overwhelmed by a $72.4 billion fair-value loss on convertible notes, derivative liabilities, and SAFEs, plus $8.8 billion of other expense tied to note purchase agreements 378 780.

The biggest driver was the fair-value remeasurement of financing instruments

The single largest reason for the H1 2026 net loss was the line item change in fair value of convertible notes, derivative liabilities, and SAFEs which was negative $72,388 million in the six months ended June 30, 2026, versus negative $10,942 million in H1 2025 780. Management states that this item "was primarily driven by an increase in the fair value of our outstanding convertible promissory notes resulting from an increase in our enterprise valuation from 2025 to 2026"378.

This means the loss was driven largely by the accounting remeasurement of capital instruments as Anthropic’s valuation increased, rather than by a collapse in demand or gross operating deterioration 378.

Core operations were still loss-making, but far less than the net loss suggests

Anthropic remained operating-loss making in H1 2026, but the operating loss was only a small fraction of the total net loss. Revenue rose to $16,286 million in H1 2026 from $1,163 million in H1 2025, while operating loss improved to negative $693 million from negative $2,135 million 780. The company also says, "Our operating loss was $693 million for the six months ended June 30, 2026, down from $2.1 billion for the six months ended June 30, 2025"346.

So the income statement shows a clear split:

Percentage change is omitted where the comparison involves losses or a zero base.

The table makes the key point clear: the negative $80,748 million net loss in H1 2026 was dominated by non-operating valuation effects, not by the operating loss of negative $693 million 780.

A second major hit came from note purchase agreement accounting

Anthropic also recorded negative $8,757 million in other income (expense), net in H1 2026, compared with essentially zero in H1 2025 780. Management says this decrease was "primarily driven by the initial fair value recognition and change in fair value of the assets and liabilities recognized under the note purchase agreements"378.

That is important because it shows the H1 2026 loss was not just one isolated mark-to-market item. There were at least two very large accounting remeasurement effects below operating profit:

• negative $72.4 billion from convertible notes, derivative liabilities, and SAFEs 378

• negative $8.8 billion from note purchase agreement-related fair-value accounting 378

Together, those two items explain almost all of the pre-tax loss 780.

Operating costs were still very high because the business is capital-intensive

Although not the main reason for the enormous net loss, Anthropic’s operating cost base remained very large. In H1 2026, compute and infrastructure expense was $8,945 million, personnel expense was $3,152 million, sales, marketing, and partnerships expense was $3,168 million, and other operating and administrative expense was $1,714 million 780.

Management describes the business as highly capital-intensive and says profitability depends in part on sustaining substantial revenue and improving operating efficiency 165. The risk factor states: "We have a history of net losses and may not generate sufficient revenue to achieve or sustain profitability in the future"165.

Still, on an operating basis the picture improved materially. The company reported that revenue growth, compute efficiency, and operating efficiency drove operating loss down sharply in H1 2026 despite those large spending levels 346.

Bottom line

Anthropic’s H1 2026 net loss was so large primarily because rising enterprise valuation drove a massive non-cash fair-value loss on convertible notes and related instruments, and because note purchase agreement accounting added another large non-operating expense 378. The underlying business was still consuming significant resources, but the reported net loss was far larger than the operating loss because of these financing-related valuation charges 780.

Sources

1. Anthropic · Item 7 - MD&A · 2026

2. Anthropic · Full document · 2026

3. Anthropic · Item 1A - Risk Factors · 2026