Apple on Tuesday posted its fiscal fourth quarter results. For the period ending September 26, 2015, the Cupertino-based company reported revenue of $51.5 billion with a net profit of $11.1 billion, or $1.96 per diluted share. Gross margin for the quarter was 39.9 percent.

In the year-ago quarter, the company brought in revenue of $42.1 billion and a net profit of $8.5 billion, or $1.42 per share. Gross margin a year ago checked in at 38 percent.

Apple CEO Tim Cook said the growth was fueled by record fourth quarter sales of the iPhone, expanded availability of the Apple Watch and all-time records for Mac sales.

The iPhone continues to be Apple's biggest money-maker, generating $32.21 billion in revenue on the sale of 48 million handsets. Apple moved 9.88 million iPads during the quarter, contributing $4.28 billion in revenue while the sale of 5.71 million Macs added another $6.88 billion. Revenue from "other" product categories including the Apple Watch and its set-top box totaled $3.05 billion.

It's worth noting that Apple's iPhone 6s and iPhone 6s Plus weren't released until September 25 and thus, likely has very little impact on the quarterly performance.

The majority of Apple's sales - 62 percent, to be exact - came from international markets.

Looking ahead, Apple said it expects revenue between $75.5 billion and $77.5 billion for the fiscal 2016 first quarter that includes the always-lucrative holiday buying season, slightly higher than last year's performance of $74.6 billion. Those figures could be on the low side considering Apple will have two new iPhones, a revised Apple TV that ships later this week and the new iPad Pro.