Key Apple suppliers SanDisk Corp, Broadcom, TriQuint Semiconductor, Intersil, Sharp Corp, Elpida Memory, RF Micro Devices and Fairchild Semiconductor International have all been snapped up since 2013.
Loop Capital Markets analyst Betsy Van Hees, has seen 35 chip companies swallowed since 2014. "You have less competition, less pricing pressure," she said.
"Which may be why Apple is going more internally than externally."
In the past, it was easier for Apple to squeeze outside suppliers to improve profit margins, she added.
This year is particularly important for Apple because it's preparing to launch three iPhones, including a flagship device with a major new design. The installation of new manufacturing lines and processes is costly, so Apple needs to find savings elsewhere. "To avoid taking a hit you put some pressure" on the suppliers, BGC Partners analyst Colin Gillis said.
Cost isn't the only incentive for Apple to develop its own components. It also helps the company couple its hardware more seamlessly with its software, Chief Financial Officer Luca Maestri explained at a Feb. 14 conference in San Francisco.
"We have better control over timing, over cost, over quality," he said.
Expansion into new markets and products may also require hardware unique to Apple's needs that isn't immediately available from outside suppliers. The AirPods Bluetooth headphones, released last year, use low-energy communications chips that Apple got through its purchase of Passif Semiconductor Corp. in 2013. In 2012, Apple spent $356 million acquiring AuthenTec Inc., which had fingerprint sensors and related chipsets that helped build the fingerprint scanner on the iPhone.
Apple was in acquisition talks last year with Imagination Technologies. The Kings Langley, England-based company designs a type of chip called a graphics processing unit that's used in iPhones and iPads, and analysts theorized Apple wanted to take the technology in house and push it forward on its own terms. Apple decided against making an offer.
Then, on April 3, Imagination said Apple would stop using its graphics technology after developing its own solutions. Apple also hired several employees from Imagination, including former Chief Operating Officer John Metcalfe. The British company lost about two-thirds of its market value that day. On Wednesday, UBS estimated Apple will pay Imagination one-third of its current royalty rate as their relationship winds down over the next two years.
We have better control over timing, over cost, over quality.
That prompted analysts and investors to cast a keener eye over what other suppliers may be next. One immediate example was Dialog, which slumped 20 percent April 11 after Bankhaus Lampe analyst Karsten Iltgen suggested Apple may cease using Dialog's power-management chips. Apple is setting up power-management design centers in Munich and California, Iltgen noted, and there's been a steady flow of engineers from Dialog to Apple over the past year.
Synaptics, whose products help control the iPhone's touch screen, could also be vulnerable, Pacific Crest Securities analyst John Vinh wrote in an April 12 note. Apple has hired "a significant number" of engineers from the company, suggesting that it's working on products that would render Synaptics redundant, Vinh said.
Vinh also highlighted Cirrus Logic, which makes audio chips used in iPhones, even as he deemed the risk of Apple developing its own competing components "medium to low."
Hiring in-house experts doesn't come cheap (Cirrus spends $200 million a year on research, Vinh noted). In the past five years, Apple doubled research and development spending as a percentage of revenue, an increase CFO Maestri attributed to new product categories and developing more of its own underlying technology, among other factors.
Semiconductor research is among the most expensive in the technology industry, often exceeding 18 per cent of revenue. Apple spends 4.7 per cent of its income on R&D, up from 2.2 per cent in 2012.
The pay-off from the investment could be substantial. Semiconductors account for about a third of iPhone manufacturing costs, according to Timothy Arcuri, a Cowen & Co. analyst. Tapering growth of smartphone sales has meanwhile heightened the need to squeeze every last dollar of profit out of the handsets that Apple does sell.
The main risk is that Apple misses new technology trends that bubble up through a large supply chain. Relying more on internally created components, it'll have fewer suppliers lining up to show it the latest innovations. When Nokia was the world's largest mobile phone maker, it focused more on cost cutting and controlling component supply and missed out on important changes in the market, according to Mike Walkley, an Apple analyst at Canaccord Genuity.
"You've seen what they've done to Imagination and Dialog Semi and all of these people who supply to Apple," he said. "It's kind of what Nokia did back in the day when they were king of the world."
An Apple spokesman declined to comment.
Then there's the risk that some partners decide they don't want to deal with Apple anymore. Bill Amelio, former chief executive officer of Lenovo Group Ltd. who now runs Avnet, said he walked away from supplying Apple and it's helped improve earnings.
The Phoenix, Arizona-based distributor of chips and other computer components had a gross profit margin of 13.7 per cent in its most recent quarter. That's 2 percentage points wider than it was a year earlier -- thanks in part to cutting ties with Apple.
