Apple (Nasdaq: AAPL) Chief Executive Officer Tim Cook says the iPhone maker will “thoroughly consider” a push by Greenlight Capital Inc.’s David Einhorn to use some of its $137.1 billion in cash and securities for preferred stock.

Cook also spelled out plans for further acquisitions, the addition of more retail stores and the expansion of others.

[Apple operates two stores in the Research Triangle Park, N.C. area, one in Durham and another in Raleigh.]

Eighteen months after succeeding Steve Jobs as CEO, Cook is facing pressure from shareholders who have seen the stock slump more than 30 percent since a September high amid slowing sales growth and tightening competition from rivals such as Samsung Electronics Co. Greenlight is suing Apple to block a proposal to eliminate the board’s ability to issue preferred stock without seeking shareholder approval, a legal effort Cook described as a “silly sideshow.”

“We welcome all ideas from all of our shareholders, including Greenlight, and we’re going to seriously consider it,” Cook said today at an investor conference in San Francisco hosted by Goldman Sachs Group Inc. “The management team and the board are in very active discussions.”

Einhorn is recommending that Apple issue $50 billion of preferred stock, to be traded alongside common shares and funded by operating cash flow. It would have a 4 percent annual cash dividend, paid quarterly, he said in a letter to shareholders. Preferred stock can have a higher yield and be issued without diluting the value of common shares.

Slowing Growth

Whatever the outcome of Greenlight’s suit, Apple won’t issue preferred stock without shareholder approval, Cook said.
“We would clearly go for a vote, whether our charter requires it or not,” Cook said.

Greenlight’s effort comes as growth is slowing for the iPhone, Apple’s biggest source of revenue and profit, as the smartphone market becomes increasingly saturated. At the same time, new products such as the iPad mini — priced to challenge tablets from Google Inc. and Amazon.com Inc. — are eroding profit margins.

“I was encouraged to hear that Cook thought the Einhorn proposal was creative, even if that’s not what they ultimately do,” said Josh Spencer, a fund manager at T. Rowe Price Group Inc., which held 2.5 percent of Apple shares as of Sept. 30. “I think they’re going to return a large amount of cash to shareholders.”

Apple, based in Cupertino, California, fell 2 percent to $470.34 at 12:15 p.m. in New York.

Acquisition Strategy

Cook also discussed Apple’s acquisition strategy. Apple will continue to buy about one company every two months, Cook said. While Cook has looked at some companies for large deals, none have passed muster, he said.

“Cash isn’t burning a hole in our pocket,” Cook said. “We’re disciplined and thoughtful and we don’t feel a pressure to go out and acquire revenue. We want to make great products. If a large company could help us do that even better, we’d consider it.”

Asked whether Apple might make a less-expensive iPhone to appeal to budget-conscious customers and users in developing countries, Cook pointed to price cuts for older models of the iPhone and iPod. The iPhone 4 is available for free with a wireless contract in the U.S., compared with a $199 starting price for the iPhone 5.

IPhone Surprise

The popularity of the iPhone 4 following a price reduction last year caught Apple off guard, Cook said.

“We didn’t have enough supply of the iPhone 4,” he said. “So it surprised us, as to the level of demand we had for it.”

Apple will enlarge 20 of its stores this year, and add 30 more retail outlets, including its first in Turkey, Cook said. On average, each store is generating about $50 million in annual sales.

To bolster gross margins, the company could sell more software and services, Cook said.

“We’re not a hardware company,” Cook said. “We have other ways to make money and reward shareholders.

One option could be a payments service linked to the more than 500 million credit cards associated with users’ iTunes accounts, Katy Huberty, an analyst at Morgan Stanley, wrote in a research report.

Cook said he’s ‘‘never been more bullish” on the innovative products in Apple’s pipeline.

“We are managing Apple for the long term,” Cook said. “I know people worry about quarters. We care, but the product decisions we make are for Apple’s long-term health, not for the short 90-day clock.”