Alphabet (GOOGL): What This Company Actually Does

How Alphabet makes money

Users search and watch videos for free; that traffic flows to Search, YouTube, and Alphabet's apps, where advertisers pay to be seen. Advertising accounts for about 73% of Alphabet's revenue. A portion of that ad revenue — the traffic acquisition cost, or TAC, running at 20.3% — flows back out to the browsers, carriers, and app publishers that sent the traffic in the first place. Separately, enterprise and government customers pay for Google Cloud, now 15% of revenue and growing fast.

Simplified. Advertisers also pay for the ~20.3% traffic acquisition cost Alphabet shares back with partners. Source: 10-K FY2025, p.33–35.

Where the revenue comes from

Within Google Services, advertising (Search, YouTube, and the ad network) makes up $294.7B — 73% of total revenue — while subscriptions, platforms, and devices contribute $48.0B (12%). Alphabet doesn't disclose operating margin at that level of detail.

Source: 10-K FY2025, p.33 (revenue by type), p.36 (segment profitability).

Source: 10-K FY2025, p.34. Over half of revenue comes from outside the U.S., leaving results exposed to currency swings and, given the large EMEA share, EU antitrust enforcement in particular.

Customers and competitors

Alphabet's customer base splits between millions of advertisers, broadly distributed with no disclosed concentration risk, and enterprise/government customers paying for Google Cloud.

• Microsoft — competes directly in cloud (Azure vs. Google Cloud) and increasingly in AI (Copilot vs. Gemini).
• Amazon — AWS leads the cloud market outright, and Amazon's advertising business is also growing into direct competition.
• Meta — competes head-on for the same brand and performance-advertising budgets via Facebook and Instagram.

The metric that matters most in this sector

Two numbers tell the real story here: how much of each advertising dollar Alphabet keeps, and whether its second growth engine (Cloud) is actually turning into a durable profit source.

A falling TAC rate means Alphabet keeps a growing share of every ad dollar. Meanwhile, Google Cloud has gone from a heavy loss-maker to a genuinely profitable segment:

Source: TAC — 10-K FY2025 p.35, FY2023 p.38, FY2021 p.36 (calculated as TAC ÷ Google advertising revenue). Cloud margin — 10-K FY2025 p.36, FY2023 p.39, FY2021 p.38.

Leadership and ownership

Sundar Pichai has been Google's CEO since 2015 and added the Alphabet CEO role in December 2019. Founders Larry Page and Sergey Brin have stepped back from day-to-day management, but they retain roughly 52.7% of total voting power through Class B shares (10 votes each) as of the end of 2025 — real control of the board and major decisions, independent of their economic ownership stake.

Source: 10-K FY2025, p.9 (key-person risk), p.21–22 (share ownership and voting power).

Capital returns

In 2025, Alphabet returned about $55.4B to shareholders — $45.4B in buybacks (Class A $6.5B + Class C $38.9B) plus roughly $10.0B in dividends. The dividend, introduced in 2024, was raised 5% to $0.21 per quarter in April 2025, and a new $70.0B buyback authorization was approved in April 2024. The diluted weighted-average share count fell from about 12.64 billion (2023) to 12.11 billion (2025) — buybacks are outpacing new share issuance from employee compensation.

Source: 10-K FY2025, p.39 (dividend and buyback programs); share-count trend calculated from the income statement, p.49.

How this company could fail

• Advertising concentration plus AI eating into search traffic — the company now explicitly names generative AI's reshaping of information-seeking behavior as a risk to its ad business.
• Antitrust — already showing up in the financials — the DOJ's search antitrust case reached a final remedies order in December 2025 (both sides have appealed), ad-tech litigation continues separately, a $3.5B EU fine was expensed in a single quarter (Q3 2025), and litigation/regulatory provisions stood at $15.6B at year-end 2025.
• AI infrastructure capex — 2025 capital expenditure hit $91.4B, up 74% from $52.5B the year before. If that spending doesn't convert into revenue, free cash flow gets squeezed quickly — it already has (see the reverse-DCF post).

Source: 10-K FY2025, p.9 (Item 1A), p.18 (DOJ litigation), p.35 (EC fine), p.39 (MD&A, provisions).

Five-year financials

Sources: income statement — 10-K FY2025 p.49 (2024–2025), FY2023 p.52 (2021–2023). Cash flow — 10-K FY2025 p.52, FY2023 p.55. Long-term debt — 10-K FY2025 p.48, FY2023 p.51, FY2021 p.49. FCF = operating cash flow − capex, calculated directly.

What we still don't know

• How the DOJ search antitrust appeal will actually change distribution agreements (like the default-search deals with Apple and browser makers) isn't something these filings can answer yet.
• Whether Cloud's margin gains hold once the AI investment cycle cools needs the next 10-Q to confirm.
• How the February 2026 $16.0B Waymo funding round affects Alphabet's stake and future earnings isn't disclosed in the filings reviewed here.