Check out the companies making headlines after the bell : Ross Stores — The off-price retailer inched higher by about 1%. Fourth-quarter earnings surpassed estimates, coming in at $1.79 per share, versus analysts' call for $1.66 per share, per LSEG. However, Ross sees first-quarter same-store sales ranging from down 3% to flat versus a 3% gain last year. Analysts polled by StreetAccount called for a 2.4% gain. Box — Shares plunged nearly 8% after the cloud company guided for first-quarter revenue of between $274 million and $275 million, while analysts polled by LSEG had expected $279.5 million. However, Box's fourth-quarter revenue of $280 million exceeded Wall Street's consensus of $279 million. ChargePoint — Shares popped almost 2% after the electric vehicle charging station operator posted fourth-quarter revenue of $101.9 million, which was above FactSet's consensus estimate of $101.6 million. ChargePoint also reported a narrower fourth-quarter adjusted net loss than analysts had predicted. CrowdStrike — The cybersecurity stock tumbled about 6%. The company sees its full-year revenue coming in between $4.74 billion and $4.81 billion, which encompasses the $4.77 billion consensus prediction, per FactSet. First-quarter revenue guidance of $1.10 billion came in slightly below estimates for $1.11 billion. AeroVironment — The manufacturer of unmanned aircraft tanked 17%. AeroVironment issued weak guidance for its full-year results, calling for adjusted earnings of $2.92 to $3.13 per share on revenue of $780 million to $795 million. Analysts polled by LSEG sought $3.45 per share in earnings and $821 million in revenue. Fiscal third-quarter results also missed the mark.