TradingKey - As of August 2026, Nvidia continued to rank first globally with a market capitalization of $5.32 trillion, followed closely by Apple, Microsoft, and Alphabet.

The biggest change in the August global market cap rankings was SpaceX's market value rising to $1.89 trillion, representing a monthly gain of 32.59%. Tesla, SK Hynix, and Micron Technology also posted substantial gains. The Philadelphia Semiconductor Index rose 1.98% in August, showing a slight recovery from a sharp correction of 20.61% in July.

Overall, compared with the concentrated correction in the semiconductor sector in July, the market in August presented a pattern of index recovery, company event-driven moves, and renewed internal divergence within the sector.

August Global Market Cap Rankings: Nvidia Remains First, SpaceX Rises to Seventh

Companies with the highest market capitalizations globally remain concentrated in the AI chip and cloud computing sectors. Nvidia's market cap reached $5.32 trillion, maintaining its position as the world's largest company; Apple ranked second with a market cap of $4.62 trillion; and Google ranked third with a market cap of $4.15 trillion.

Microsoft ranked fourth with a market cap of $3.77 trillion; Amazon ranked fifth with a market cap of $2.80 trillion; TSMC ranked sixth at $2.15 trillion; SpaceX's market cap rose to $1.89 trillion, surpassing Broadcom to rank seventh; Broadcom ranked eighth with a market cap of $1.76 trillion; while Meta Platforms and Tesla ranked ninth and tenth, respectively.

In terms of monthly performance, SpaceX led the list with a 32.59% gain; Tesla rose 18.23%, Micron Technology gained 16.49%, SK Hynix advanced 14.51%, Nvidia climbed 9.98%, and Microsoft added 9.37%.

On the other hand, Broadcom fell 4.87%, Alphabet Class A slipped 4.71%, Amazon declined 4.35%, and Berkshire Hathaway Class A dropped 1.30%.

Nvidia Earnings: AI Compute Demand Continues to Be Core Support for Market Cap Growth

Nvidia reported its fiscal second-quarter financial results after the market close on August 26. The company achieved $96.2 billion in revenue, up 18% quarter-over-quarter and 106% year-over-year, with its data center business contributing $89 billion as the primary driver of revenue growth.

The company also projected that revenue will continue to grow by approximately 70% in the next fiscal year, fiscal 2028. These figures further reinforce Nvidia's core position in the AI computing supply chain and explain its market performance in August, when its stock rose 9.98% and its market capitalization climbed to $5.32 trillion.

Looking at global market capitalization rankings, Nvidia's lead is not merely driven by a cyclical uptick among chipmakers. The data center business has become the company's most important revenue source, and demand for AI model training and inference continues to propagate to upstream segments such as GPUs, networking equipment, and high-bandwidth memory. The key takeaway from Nvidia's August earnings report is not just the continued expansion of its revenue scale, but the further concentration of the data center business's contribution to overall performance.

SpaceX Shares Rise 32% in a Month Amid First Quarterly Earnings and Lockup Pressure

In August, SpaceX released its first quarterly earnings report since going public, drawing intense attention from capital markets. Following the earnings disclosure, the market was briefly concerned about the company's massive investments and post-listing valuation volatility. However, as the key insider lockup period expired in early August, substantial capital poured in, driving the stock up nearly 19% in a week.

As of August 31, SpaceX closed at $143.69, rising 32.59% in August with its market capitalization reaching $1.89 trillion, climbing from eighth in July to seventh and surpassing Broadcom. SpaceX became the top gainer among global companies by market capitalization in August and was one of the most closely watched volatile assets that month.

SpaceX's August performance was not driven by its earnings report, but rather marked the beginning of a market valuation recovery after experiencing a decline of roughly 50%.

Morgan Stanley recently stated that the market is currently pricing SpaceX's AI business extremely conservatively, assigning an implied valuation of only about $12 per share to its AI business (including consumer and enterprise AI), corresponding to a 2028 EV/Sales multiple slightly above 1x, which is even lower than the valuation levels of peer emerging cloud service providers. The firm believes that as progress related to Cursor/Grok continues to be disclosed, this valuation discount is expected to narrow gradually, forming an upward-skewed catalyst path.

Semiconductor Sector Halts Decline and Recovers, but Performance Diverges Across Segments

The Philadelphia Semiconductor Index rose 1.98% in August. Compared with a 20.61% decline in July, the index recovered in August, but the extent of the rebound was modest, indicating that after experiencing a rapid initial adjustment, the market is still reassessing AI capital expenditure, chip demand, and supply chain valuations.

Individual stock performance shows that capital did not flow evenly into all semiconductor companies. Nvidia rose 9.98% in August, TSMC gained 2.74%, but Broadcom fell 4.87%. Memory chip companies performed even stronger, with SK Hynix surging 14.51% and Micron Technology jumping 16.49%. This indicates that in August, capital focus was concentrated more on AI server-related memory demand, as well as rebound opportunities following deep earlier adjustments.

TSMC ranks sixth globally with a market capitalization of $2.15 trillion, remaining the benchmark for advanced nodes and AI chip manufacturing; although Broadcom reached a market capitalization of $1.76 trillion, its stock price fell 4.87% in August, reflecting that market pricing in segments such as custom chips and networking chips did not move in sync with the broader AI hardware sector.

Therefore, the semiconductor market in August did not experience a broad-based rally, but instead exhibited structural characteristics marked by "a modest index recovery, relatively resilient leaders, a strengthening memory sector, and pullbacks in certain high-valuation companies."

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