Samsung turned 87% of its added sales into profit in a record 107.4 trillion won quarter

Working back from the 126.6% revenue growth rate ^[2], Samsung's sales a year ago were about 86.1 trillion won ^[14]. The 12.17 trillion won of operating profit it earned then ^[1] was a margin of roughly 14% ^[15]. This quarter's margin is about 55% ^[13]. Over the year, revenue rose by about 109 trillion won and operating profit by about 95 trillion won, so roughly 87 won of every 100 won of added sales reached operating profit ^[16].

Samsung did not break out its divisions or explain what drove the growth ^[5], so the guidance cannot separate price from volume. An incremental margin near 87% is what higher prices on a mostly fixed cost base produce; added volume brings added cost with it. The effect was still building last quarter. On the 13.7% sequential revenue growth ^[3], second-quarter sales were about 171.5 trillion won, and 89.4 trillion won of profit ^[4] put the margin at about 52.1% ^[17]. The 23.5 trillion won of revenue added since then came through at about 77% ^[18].

The forecast miss points the same way. JoongAng Daily put analysts' revenue forecasts at 200.3 trillion won ^[8] and the FnGuide profit consensus at 106 trillion won ^[7]. Together those implied a margin of about 52.9%, and Samsung booked 5.3 trillion won less revenue than forecast and 1.4 trillion won more profit ^[19]. A supplier short of output and paid on price would produce that pattern. Channel NewsAsia's account of the market fits it: soaring demand for AI infrastructure has outstripped memory chip supply growth, according to its report ^[9].

The same numbers allow other readings. JoongAng Daily said a stronger won had been expected to weigh on earnings ^[7], and a currency effect could cut reported sales with no change in supply. The link to memory comes from the press coverage, which credited booming demand for AI chips with driving strong memory earnings ^[12]. Until Samsung reports by division, the 55% margin ^[13] is a blend of all its businesses, and those figures arrive with full results later this month ^[6].

I think the guidance supports a narrower claim than memory being the scarcest input in AI infrastructure. The three reports discuss memory alone. They show that memory is short and that Samsung's margins rose with it, but they cannot rank memory against processors or any other component. The quarter's profit is also still an estimate ^[1], and it beat the FnGuide consensus by about 1.3% ^[19].