Check out the companies making the biggest moves midday: Stride — The for-profit education company plunged 50%, on pace for its worst day ever, on much weaker-than-expected guidance. The company sees fiscal second-quarter revenue between $620 million and $640 million. Analysts on average expected an outlook of $613.3 million. Full-year revenue and operating income guidance also fell short of estimates. Caterpillar — The construction and agriculture equipment manufacturer jumped 12% on better-than-expected results for the third quarter. Caterpillar earned $4.95 per share, adjusted, on revenue of $17.64 billion. Analysts polled by LSEG expected a profit of $4.59 per share on revenue of $16.77 billion. The stock was on pace for its biggest one-day gain since 2009. Avantor — Shares of the phar

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