In a market where stock splits have become rarer, there may be more of this to come than just the two stocks with four-digit stock prices in the Standard & Poor's 500 index - Google and Priceline.com, which hit $1,000 earlier this year.

Historically, once share prices got too high - even around $125 a share - companies split shares to make them more accessible to Main Street investors. But splits have become few and far between, and big numbers are more the norm for familiar names like Apple Inc, Chipotle Mexican Grill Inc, Netflix Inc and Visa Inc.

Stock splits peaked in 1986 and 1987, when there were 114 and 111 splits, respectively, and they surged again in the go-go days of the dot-com bubble, with 102 splits in 1997, back when retail investors hungrily chased the tech boom, according to S&P Dow Jones Indices.

That frenzy ended after the bubble burst, and has diminished further since the last peak in 2007. The trend now, according to Richard Peterson, director of S&P Capital IQ Global Markets Intelligence group, is for companies to let prices rise as retail and individual investors are not as likely to balk as they once were.

"Many retail investors have migrated off to exchange-traded funds or mutual funds. And many of the trading companies don't want a split because if you split the shares you inherently increase the trading costs," said Peterson.

Peterson added that if the trend continues, the market could see more companies join Priceline and Google above the $1,000 a share mark.

"Maybe next year or the year after we could see double digits reach the four digit," he said.

In 1980, just two stocks in the S&P 500 had a price above $125, and 64 companies split their stocks. That figure has slowly dwindled, and in 2013, there were 41 stocks with share prices north of $125 - and just 11 splits, according to S&P Dow Jones Indices.

Meanwhile, outside of the S&P 500, only a couple have such massive prices: Berkshire Hathaway's A-class shares, which at $175,748.00 trade just a few hundred shares daily.

The company's B shares - first issued in 1996 to attract "investors with a long-term perspective," as Buffett put it then, are the more active. That security was once a $1,000 stock until Warren Buffett's conglomerate bought railroad Burlington Northern Santa Fe in 2009. The B shares edged down 0.04 percent to $116.97 on the New York Stock Exchange on Friday.

Another $1,000 name is Seaboard Corp, which at $2,810.98 also only trades a few times daily.

To be sure, companies are splitting more now than they did during and immediately after the recession when share prices took a tumble. In 2008, nine S&P companies split their stock, followed by 10 in 2009.

(Reporting by Julia Edwards; Editing by Richard Chang)

By Julia Edwards