NEW YORK (TheStreet) -- Stock futures slipped on Wednesday on reports Greece's latest proposed reforms had been rejected by eurozone creditors. 

S&P 500 futures were down 0.21%, Dow Jones Industrial Average futures fell 0.33%, and Nasdaq futures slipped 0.17%.

Greece's list of reforms submitted on Monday reportedly were rejected by eurozone leaders, according to Bloomberg. Creditors have reportedly returned a list of revised terms. Eurozone leaders will meet again at the end of the week. Talks have escalated as Greece faces a crucial repayment to the International Monetary Fund by the end of the month.

Stocks edged higher on Tuesday with the Nasdaq reaching a new record close as investors held out hope that a deal to resolve Greece's lingering debt problems could be reached by the weekend. Click here for more.

The final estimate of first-quarter GDP showed the U.S. economy contracted at a slower-than-expected pace than originally believed. GDP was revised to reflect a 0.2% contraction compared to a previously estimated 0.7% decline. 

Lennar (LEN) added nearly 5% in premarket trading after reporting second-quarter earnings of 79 cents a share, 15 cents above estimates. The homebuilder generated revenue of $2.39 billion, up 31.3% from a year earlier.

Monsanto (MON) shares were on watch after the agricultural chemicals company reported a mixed quarter. The company earned $2.39 a share, 32 cents higher than expected, while revenue of $4.58 billion fell short of estimates. 

Netflix (NFLX) jumped 2.6% before the bell after announcing it will execute a 7-for-1 stock split on July 14. Shares moved above $700 for the first time. 

Ahold (AHONY) and Delhaize Group (DEG) announced plans to merge, a deal that would create a supermarket giant in the U.S. and Europe. Ahold shareholders will own 61% of the combined company. 

Boeing (BA) has named Dennis Muilenberg as its new CEO effective July 1. Current CEO James McNerney has served in the position since 2005.