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Jeffrey R. Immelt, the chief executive of General Electric, says he spent his whole 2013 cash bonus on G.E. stock.

Mr. Immelt bought about 105,000 shares on Monday for a little more than $2.6 million, according to a company filing.

“I am investing right alongside of you,” Mr. Immelt said in his annual letter, which is to be released later this month. A quote from the letter was provided by Seth Martin, a G.E. spokesman. “I have invested my entire bonus in G.E. stock. Like the rest of our leaders, I believe in G.E.”

Mr. Immelt’s purchase of his company’s stock represents one of the largest by a chief executive in the last year, and comes on top of the 40,000 shares he bought in January for about $1 million.

His latest investment represents a relatively small portion of the 1.9 million shares Mr. Immelt owns directly in G.E.

“Considering he’s been the C.E.O. for about a decade and been paid a lot of money, that’s not particularly impressive,” said Alan Johnson, head of the compensation consulting firm Johnson Associates, referring to Mr. Immelt’s new investment. “It’s a nice gesture, but it’s a gesture.”

Mr. Immelt ranked 20th on a list of the highest-paid chief executives in 2012 compiled by Equilar, an executive compensation data firm. His salary and bonus in 2012 totaled nearly $8 million, and he also earned a long-term performance award of $12 million.

Mr. Martin would not disclose Mr. Immelt’s bonus for 2013.

While Mr. Immelt may have spent his whole cash bonus on G.E. stock, he could still earn a stock award for 2013. He did not receive such an award in 2012.

G.E. stock has risen about 10 percent in the last year, and was trading at about $25.60 at midday on Tuesday.

Chief executives sometimes spend their own money on company stock as a way to shore up investor confidence.

In 2011, when Morgan Stanley’s stock had fallen to $20 a share, the bank’s chief executive, James P. Gorman, bought 100,000 shares. Mr. Gorman would ride his investment all the way down to $12 a share at one point in 2012.

That bet now looks like it may have paid off. Morgan Stanley’s stock is trading around $30, yielding a gain of about $1 million on paper for Mr. Gorman.