Stocks making the biggest moves after hours: WD-40 Company, Costco and more

Check retired the companies making headlines aft the bell: 

WD-40 Company — Shares gained 11% aft the shaper of metallic lubricants reported fiscal third-quarter results that bushed analysts' expectations. WD-40 posted net of $1.46 per stock connected gross of $155 million, higher than the net of $1.39 per stock connected gross of $145.8 cardinal analysts were expecting, according to FactSet.

PriceSmart — The rank warehouse nine relation added 6% aft posting a fiscal third-quarter net and gross beat. PriceSmart's adjusted net came to $1.08 per share, portion analysts polled by FactSet had expected $1.01 per share. The company's $1.23 cardinal successful gross was besides higher than the $1.21 cardinal statement estimate.

Costco Wholesale — Shares gained 3% aft the membership-only retail concatenation announced its archetypal membership complaint increase since 2017. Costco said it would beryllium raising its rank by $5 for yearly memberships, portion its higher-tier program would spot a $10 increase.

On Semiconductor, Microchip Technology — The semiconductor stocks some mislaid 2% successful extended-hours trading. This was a crisp reversal from their large gains successful the regular session, erstwhile the stocks added 4.2% and 3.9%, respectively.