Pre-breakup AT&T was the biggest business on earth by revenue (~$65B in 1982 vs IBM's ~$34B) but the market paid up for IBM's margins and mainframe monopoly. The 1984 Bell System divestiture removed AT&T from contention permanently, and IBM ruled the decade — peaking around $90B in 1985. Meanwhile the revenue crown belonged to Exxon, then GM — neither ever close to the cap crown in this era.
IBM's slow-motion collapse (revenue peaked at $68.9B in 1990, then shrank while losses mounted to $8B by 1993) let Exxon — a company with nearly twice the revenue and half the glamour — take the crown almost unnoticed. 1990 was a genuine photo finish: IBM ≈$64.6B vs Exxon ≈$64.3B at year-end. 1992 was a three-way squeaker with Walmart and GE within $3B.
Jack Welch's GE held the crown longer in this stretch than any other company (1993–97, 2000–01, 2003–05). Microsoft snatched it at the dot-com peak (1998–99, again briefly in 2002) with one-sixth of GE's revenue. The popular myth that Microsoft stayed #1 through 2000–01 is wrong: MSFT lost ~60% in calendar 2000 and GE ($475B) ended that year comfortably on top. The revenue crown, meanwhile, passed from GM to ExxonMobil to Walmart without either ever threatening the cap crown.
$100+ oil made XOM the only company ever to wear the cap crown with revenue above $400B — and in 2008 and 2011 it held both crowns simultaneously, the only times that has happened since 1980. It held cap #1 through the 2008 crash (its cap fell just 19% while the market halved) and fended off Apple at year-end 2011 ($406B vs $376B).
Apple took year-end #1 in 2012 and held it every year through 2024 except 2018 (Microsoft, during the Q4-2018 selloff). Then 2025 flipped both crowns in the same year: NVIDIA ended at ~$4.6T on $215.9B of FY2026 revenue (a 21.5× multiple, highest since Microsoft 1999), and Amazon ended Walmart's 13-year revenue streak by $3.7B. The last time both crowns changed hands in one calendar year: never, in this dataset.
Sort the 46 market-cap crowns by revenue and the ordering is nearly uncorrelated with when the crown was won. Three regimes are visible in the cap-to-revenue ratio: industrials/oil at 0.7–3×, GE's quality-franchise premium drifting 1.5–3.7×, then software/AI at 7–30× (Microsoft 1999: 30.6×; NVIDIA 2025: 21.5×). The revenue crown is the opposite — a slow, stable grind that has compounded at just 4.4%/yr (roughly nominal GDP plus a hair) and changed hands only on structural shifts: oil shocks, the rise of the suburban big-box, and now e-commerce.
Everything below is extrapolation, not prediction — constant-CAGR curves you can bend with the sliders. The point is to see what different growth assumptions imply, and which assumptions are historically precedented. Defaults are set to the actual 45-year trend rates.
The market-cap crown in 2040. At the 45-year trend rate (11.2%), the 2040 crown is a ~$23T company. The honest answer about who wears it: history says don't bet on the incumbent. Of the seven cap-crown holders, only General Electric and Microsoft ever lost the crown and took it back — every other handoff was permanent. NVIDIA (~$5.0T as of mid-June 2026) wears it today at 21.5× revenue; for it to still wear the crown in 2040 at a sane multiple (say 6–8×), its revenue would need to reach $3T+ — a 19%+ CAGR for 15 straight years. Possible, unprecedented. The base-rate play: the 2040 crown belongs to a company that is currently in the $100B–$1T tier, or doesn't exist yet — that's where Apple was in 2010, Microsoft in 1990, and NVIDIA in 2020 relative to their crowns.
The revenue crown in 2040. Far more predictable — it has compounded at 4.4% for 45 years and its holders change roughly once per generation. At the slider defaults, Amazon holds it comfortably: ~$3.0T by 2040 vs Walmart's ~$1.4T, with the gap becoming irreversible around 2027–28. The interesting scenario is NVIDIA (or whichever AI platform wins): at a sustained 20%+ CAGR, AI infrastructure revenue catches the retailers in the late 2030s — which would make the 2040 revenue crown a technology company for the first time ever. No tech company has ever held the revenue crown; that's the scenario worth watching.
Scope. US-headquartered companies listed on the NYSE or NASDAQ. Market-cap crown = largest by market capitalization at calendar year-end (Dec 31 close). Revenue crown = largest by reported annual revenue for the fiscal year ending in/aligned to that calendar year (Fortune 500 convention: the Fortune list year reflects the prior fiscal year — figures here are re-mapped to the revenue year itself). PetroChina briefly topped global cap rankings in 2007/2009 but is excluded as a non-US company.
Fiscal-year mapping. Microsoft's FY ends June 30; Apple's late September; NVIDIA's late January (calendar 2025 = FY2026: $215.9B); Walmart's January 31 (calendar 2025 = FY2026, Feb 2025–Jan 2026: $713.2B — the year that overlaps calendar 2025 for 11 of 12 months). Amazon reports on calendar years. ExxonMobil cap-crown years use 10-K "total revenues and other income"; revenue-crown years use Fortune 500 figures (which exclude excise taxes for oil companies — hence XOM showing $477.4B in the cap table but $442.9B in the revenue table for 2008). GM's 1999 figure is Fortune's $189.1B (incl. GMAC et al.); GM's own AR headline was $176.6B.
Contested year-ends (†). Market cap: 1980 (IBM ~$39.6B narrowly over AT&T), 1982 (AT&T/IBM virtual tie), 1990 (IBM ≈$64.6B vs Exxon ≈$64.3B — a coin flip), 1992 (Exxon over Walmart/GE by <4%), 1998 (MSFT over GE by ~4%), 2000–01 (frequently misreported as Microsoft; GE held both year-ends). Revenue: 1982–84 Exxon figures are Fortune-list values during the oil glut (sequence $97.2B → $88.6B → $90.9B); 2025 is a 0.5% margin (Amazon $716.9B vs Walmart $713.2B, both from SEC filings).
Verification trail. GE 1991–93 revenues from GE's FY1993 10-K (SEC EDGAR); IBM 1989–93 from IBM's FY1993 10-K; AT&T 1981–83 from contemporaneous UPI reports of the final consolidated Bell System results; Microsoft FY98/FY99 from Microsoft's earnings releases; NVIDIA FY2026 from Feb 2026 earnings coverage; Amazon 2025 ($716.9B) and Walmart FY2026 ($713.2B) from their SEC-filed earnings releases; Fortune #1 sequence cross-checked against LA Times (2008) and Wikipedia (2012) for the contested Walmart/Exxon swaps. Pre-1995 market caps are approximations (±5%) from contemporaneous reporting and share-count arithmetic.