Macy's (M) - Get Report and Kohl's (KSS) - Get Report stocks headed for more declines on Thursday after tumbling more than 10% on Wednesday after the retailers said they saw lower-than-expected comparable store sales in the months headed into the holiday season. The share prices of their vendors could also suffer today.

Macy's top suppliers include Ralph Lauren (RL) - Get Report , Michael Kors (KORS) and Under Armour (UAA) - Get Report . Kohl's primary vendors include Nike (NKE) - Get Report and PVH (PVH) - Get Report - the maker of Calvin and Tommy Hilfiger, according to data compiled by the Bloomberg database.

After Macy's and Kohl's both announced late on Wednesday that same-store sales decreased 2.1% year-over-year in November and December, shares of the companies slipped in after-hours trading, as did some of their key vendors.

Nike stock fell $1.32, or 2.5%, to $51.74 a share, Ralph Lauren stock fell by 74 cents, or 0.82%, to $89.88 and Michael Kors stock plunged $1.35, or 3.1%, to $42.15 in after-hours trading Wednesday.

Macy's stock slipped $3.64, or 10.16%, to $32.20 a share and Kohl's stock fell $7.93, 15.29%, to $43.95 a share in after-hours trading yesterday.

As a result of the slip in comparable store sales, Macy's reduced its full-year diluted earnings per share guidance to between $2.95 and $3.10, versus its prior expectation of diluted earnings of $3.15 to $3.40. And Kohl's said it now expects 2016 diluted earnings per share in the range of $2.92 and $2.97, compared to its previous expectations of $3.12 to $3.32 per diluted share, according to two separate statements from the retailers issued Wednesday evening.

Macy's is expected to release its full-year earnings report on Feb. 21 and Kohl's is set to report on Feb. 23.

On Wednesday, Macy's also announced that it will close 68 stores by the spring of 2017 - as part of a larger initiative to shutter 100 locations in the next few years - but said it said the store reduction will result in a $575 million hit on its sales for 2017.

The retailer did say it will open 50 Backstage off-price stores and 50 Bluemercury beauty stores over the next two years to compensate for the closings.