Home Depot Inc.  (HD) shares were active in premarket trading Wednesday after the home-improvement retailer reaffirmed its full-year sales and earnings guidance ahead of an investor day conference call from its Atlanta headquarters and outlined a $15 billion share buyback plan.

Home Depot said it expects full-year sales to rise 6.3% from 2016, with same-store sales rising 6.5%. Full-year diluted earnings per share are expected to grow 14% to $7.36, the company said, and said it will repurchase an additional $2.1 billion of shares in the current fiscal quarter, taking full-year buybacks to $8 billion. The company also said it announced a "a $15 billion share repurchase program, replacing its previous authorization. Since 2002 and through the third quarter of fiscal 2017, the company has returned approximately $73 billion of cash to shareholders through repurchases, repurchasing approximately 1.3 billion shares."

"The retail landscape is changing at unprecedented rates and we plan to invest for the future to address the evolving needs of our customers. We will accelerate our investments, while continuing to focus on delivering the value our shareholders expect from The Home Depot," said CEO Craig Menear.

Home Depot shares were marked 0.19% lower from their Tuesday close in premarket trading in New York, indicating an opening price of $182.50, a move that would take its six-month gain to around 18%.

Home Depot posted a whopping 7.9% increase in comparable-store sales in the third quarter, exceeding the Wall Street estimate of 5.8%. It also crushed earnings, reporting $1.84 a share, 2 cents ahead of forecasts. Total revenue for the Atlanta-based retailer was $25.03 billion, up 8% from the same period last year. Third-quarter earnings rose 15% from a year earlier. Comp sales in the U.S. increased slightly more slowly, at 7.7%.

More of What's Trending on TheStreet:

More from Markets

Week Ahead: Trade Fears and Stress Tests Signal More Volatility To Come

Week Ahead: Trade Fears and Stress Tests Signal More Volatility To Come

Trump Takes Aim at Auto Imports; Markets End Mixed -- ICYMI

Trump Takes Aim at Auto Imports; Markets End Mixed -- ICYMI

Video: What Oprah's Content Partnership With Apple Means for the Rest of Tech

Video: What Oprah's Content Partnership With Apple Means for the Rest of Tech

REPLAY: Jim Cramer on the Markets, Oil, Starbucks, Tesla, Okta and Red Hat

REPLAY: Jim Cramer on the Markets, Oil, Starbucks, Tesla, Okta and Red Hat

Flashback Friday: The Market Movers

Flashback Friday: The Market Movers