Shares in Care.com Inc soared 18 percent in extended trading, after the home care provider announced a $46.35 million investment from Google Capital, the growth equity arm of Alphabet Inc.

Google Capital’s investment makes it the largest shareholder in Care.com, and Laela Sturdy, a partner at the fund, will join the company’s board, Care.com said Wednesday in a statement. The company provides child, adult, senior, pet and home-care services and had a market capitalization of $276 million as of Wednesday. 

Google Capital was founded in 2013 and has invested in numerous private companies. It pairs its companies with advisers spread across Alphabet, and in the last six months has tapped 300 different people to give advice to its companies, Sturdy said. This deal marks its first investment in a public company.

Care.com said it used a portion of the Google Capital investment to repurchase 3.7 million shares of its common stock from Matrix Partners at a price of $8.25 per share, a 5 percent discount to the 30-day volume-weighted average price. It also issued a new series of convertible preferred stock to Google Capital at an initial conversion price of $10.50 per share. Dividends on the stock will accrue at 5.5 percent annually, the company said.

Matrix had been an investor since 2006 and wanted to make some divestments, so it was a good time to do a buyback, said Sheila Marcelo, Care.com chairwoman and chief executive officer. “It helps us reduce pressure on our stock,” she said.

Once the transaction closes, the company expects a share dilution of approximately 2 percent with a net share increase of about 700,000 shares, she said. The company has about 32.6 million shares outstanding, according to data compiled by Bloomberg.

The shares reached as high as $10 in extended trading after closing at $8.47 in New York.

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