WASHINGTON A US House of Representatives panel on Friday demanded internal emails, detailed

financial information and other company records from top executives of Amazon.com Inc., Facebook Inc, Apple Inc, and Alphabet Inc’s Google, widening the antitrust probe of Big Tech.The letters seek by Oct. 14 internal emails over the last decade from Apple CEO Tim Cook, Amazon CEO Jeff Bezos, Facebook CEO Mark Zuckerberg and Alphabet CEO Larry Page, among others, about acquisitions.Apple shares fell about 1.8% after the market opened. While Apple had been mentioned as a potential target, the House letter offered the first concrete evidence of a wide-ranging antitrust investigation. Apple has faced general led a group of 50 attorneys general

from U.S. states and territories in a probe of whether Google abuses its market power in advertising. “There is growing evidence that a handful of corporations have come to capture an outsized share of online commerce and communications,” said House Judiciary Committee chairman Jerrold Nadler, a Democrat, who signed the letters along with Ranking Republican

Representative Doug Collins and Representative David Cicilline, who chairs the antitrust subcommittee and ranking Republican Jim Sensenbrenner.“

This information is key in helping determine whether anticompetitive

behavior is occurring, whether our antitrust enforcement agencies should investigate specific issues and whether or not our antitrust laws need improvement to better promote competition

in the digital markets,” Collins said in a statement.The lawmakers seek emails from senior executives on topics including acquisitions like Amazon’s purchase of AbeBooks, PillPack, Eero, Ring, Zappos and Whole Foods; and Google’s acquisition

of AdMob, YouTube, Android and DoubleClick.They also seek information on various

policies including Google’s decision to automatically sign into Chrome any user to logs into any Google service. Apple did not immediately respond to a request for comment, while Amazon and Facebook declined to comment. Google referred to a blog post this week that said its services “create choice for consumers.”The committee requested information from the companies’ executives on market share, competitors, their largest customers for specific products and documents from other investigations.It asked Apple for information on App Store concerns such as the decision to remove some parental control apps and its policy regarding whether iPhone users can set non-Apple apps as defaults. The committee seeks communications on Facebook’s purchase of Instagram, WhatsApp and Onavo and its decisions to integrate Instagram, Facebook Messenger and WhatsApp and