ACC 250 · Accounting in the News

Anthropic’s S-1:
Reading an IPO Filing Like an Accountant

The maker of Claude filed to go public on Oct 26, 2026 (ticker ANT, Nasdaq). Seven ideas from this course, found in one real filing.

Figures: six months ended June 30, 2026 (“H1 2026”) unless noted · $ in billions

Background

What is an S-1?

Form S-1 (registration statement)

The document a company files with the SEC before it sells stock to the public for the first time (an IPO).

1
It contains audited financial statements: the balance sheet, income statement, statement of cash flows, and the notes.
2
Plus risk factors and MD&A, where management explains the numbers in plain language.
3
Investors have never seen these numbers before. The financial statements are the same ones we build in class.

Concept 1 · Revenue Recognition (Ch3)

Revenue: record it when it is earned

Reported revenue ($B)

Full year 2025
4.6
H1 2025
1.2
Q1 2026
4.7
Q2 2026
11.6

H1 2026 total = $16.3B, more than 3× all of 2025.

API (pay per use): a developer’s app sends a request → Claude answers → the service is delivered → revenue is earned right then.
Subscriptions paid up front: cash comes in first, but the service is delivered over the month or year.
→ Unearned revenue (a liability) first, then revenue over time (Ch4 adjusting entries).
Key ideaCash collected ≠ revenue earned.

Concept 2 · Matching & Capitalization

Where does the computing cost go?

Running AI needs huge amounts of computing power: in Q2 alone, about $5.6B of compute against $11.6B of revenue.

Serving customers today

Compute that answers customer requests → Cost of revenue. Matched against the revenue it produces in the same period.

Training the next model

Compute spent building future models → R&D expense. Under U.S. GAAP, research is expensed right away, not capitalized, even if it creates future benefits.

Why classification matters: moving a cost between cost of revenue and an operating expense changes gross margin but not operating income. Analysts’ gross margin estimates for Anthropic range from about 40% to 85%, depending on which costs they count.

Concept 3 · The Income Statement (Ch3)

Two different “bottom lines”

Condensed income statement, H1 2026

$B
Revenue16.3
− Cost of revenue and operating expenses(17.0)
Operating income (loss)(0.7)
Change in fair value of convertible notes, etc.(72.4)
All other items, net*(7.6)
Net income (loss)(80.7)

*Derived by subtraction: 80.7 − 0.7 − 72.4.

Ask yourself

An $80.7B loss on $16.3B of revenue. Is the business collapsing?

Operating loss is only $0.7B: the core business nearly breaks even.
About 90% of the net loss comes from one non-operating line. Next slide.

Concept 4 · Liabilities at Fair Value (Ch10)

Why being worth more created a $72B loss

Convertible notes: Amazon lent Anthropic $6.2B (principal). The notes can be converted into Anthropic stock.
As Anthropic’s value soared, the stock the notes convert into became worth far more → the liability is carried at fair value: about $108.6B.
A bigger liability with no new asset → a loss on the income statement.
Journal entry (summary)DebitCredit
Loss on fair value change72.4
Convertible notes payable72.4
The paradoxGood news for the company → bad news on its income statement.

No cash left the company. And on the other side, Amazon records a gain on the same notes.

Concept 5 · Accrual vs. Cash

A big net loss, but positive cash flow

Operating cash flow, indirect method (simplified)

$B
Net loss(80.7)
+ Fair value loss (non-cash)72.4
+ Stock-based compensation (non-cash)+
± Changes in working capital, etc.±
Free cash flow (analyst estimates)≈ +3.4
Accrual accounting records events when they happen. The cash flow statement shows where the cash actually went.
Add back non-cash expenses and the picture flips: the business generated cash in H1 2026.
Cash and short-term investments: about $131.7B, as reported in coverage of the filing.
Key ideaRead all three statements together, never the bottom line alone.

Concept 6 · Stock Compensation & Non-GAAP (Ch11)

“Adjusted” profit vs. GAAP loss

GAAP operating income
−0.7
“Adjusted” operating income
+1.6

The company’s own adjusted measure removes stock-based compensation and some other items.

Paying employees in stockDebitCredit
Compensation expense✓
Additional paid-in capital✓
No cash leaves, but it is a real cost: owners are giving away part of the company.
Key ideaNon-GAAP numbers are management’s choice. GAAP numbers follow the rules.

Bonus · Commitments vs. Liabilities (Ch10)

A $500B+ promise that is not on the balance sheet

Anthropic has signed long-term deals to buy computing capacity: reported at roughly $518–537B over 7–10 years, mostly take-or-pay (it must pay even if it doesn’t use the capacity).

Why not a liability yet?

A liability needs a past event. The cloud providers haven’t delivered the service yet, so it is a future obligation.

So where is it?

In the notes, as commitments. Equipment leases go on the balance sheet only when they start.

Key ideaAlways read the notes. Some of the biggest numbers live there.

Recap

One filing, seven course concepts

ConceptWhere we cover itAnthropic example
Revenue recognitionCh3, Ch4API revenue when used; subscriptions over time
Matching / capitalizationCh3, Ch9Serving compute → cost of revenue; training → R&D
Operating vs. net incomeCh3−$0.7B operating vs. −$80.7B net
Liabilities at fair valueCh10$72.4B loss on Amazon’s convertible notes
Accrual vs. cashCash flowsBig net loss, positive free cash flow
Stock comp & non-GAAPCh11Adjusted +$1.6B vs. GAAP −$0.7B
CommitmentsCh10$500B+ compute deals, in the notes only

Discussion

Questions for you

  1. Q1. If Anthropic’s value fell next year, what would happen to the convertible notes liability and to net income?
  2. Q2. A customer prepays $1,200 for a one-year Claude subscription on Jan 1. How much revenue by Mar 31? What is the journal entry at Jan 1?
  3. Q3. Which number would you use to judge Anthropic: net loss, GAAP operating loss, adjusted operating income, or free cash flow? Why?

Sources

Where the numbers come from

Several figures (free cash flow, cash balance, gross margin, commitment totals) are from press and analyst coverage and are rounded. Check the filing before citing them.