SEATTLE (

TheStreet

) --

Amazon.com

(AMZN) - Get Report

is acquiring Quidsi, the parent company of Diapers.com and Soap.com, according to a published media report.

The price tag is $540 million in cash, according to the report, which was posted on

Fortune's

Web site Saturday. That's $200 million more than Quidsi's valuation in its latest round of venture financing, the report added.

Quidsi's co-founders Marc Lore and Vinnie Bharara have agreed to multiyear employment contracts at Seattle-based Amazon, the report also said.

The electronic-retailing giant planned to announce the deal on Monday, the report said.

Amazon shares closed Friday at $170.77.

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This article was written by a staff member of TheStreet.