CEO Rometty Bought $3 Million In IBM Stock On Heels Of Red Hat Deal

IBM CEO Ginni Rometty upped her personal stake in Big Blue on Friday after negotiating the largest acquisition in the company's history.

In a show of confidence in the blockbuster $34 billion deal to acquire Red Hat, Rometty invested another $3 million of her own money in the company she leads, according to an SEC filing.

Rometty, IBM's chairman of the board as well as CEO and president, bought 8,500 shares at $117.51 and 17,291 shares at $115.67—roughly $2 million and $1 million purchases respectively.

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IBM told CNBC that Rometty made the $2 million buy through a retirement fund, and the $1 million buy on the open stock market. That brought the IBM leader's personal stake to 314,000 shares—worth more than $37 million at Monday's stock price above $120.

Armonk, N.Y.-based IBM last week agreed to buy enterprise software giant Red Hat for $34 billion, or $190 a share, a 63 percent premium on Red Hat's stock price at the time of the deal.

Other IBM board members and executive leaders also added to their IBM investments, CNBC reported.