Stock Market Movers: 30 October 2026

Worst Performers

10. SNDK: SanDisk Corp. (SNDK) sheds 13.47% on AI tech selloff.

9. TXG: 10X Genomics (TXG) loses 14% ahead of health conference participation.

8. BFLY: Butterfly Network (BFLY) drops 14.91% as CEO proposes sale of 90.6K shares.

7. TWLO: Twilio Inc. (TWLO) loses 15.24% following Q3 earnings and weak Q4 outlook.

6. BFAM: Bright Horizons Family Solutions (BFAM) decreases 17.92% on net losses and lower FY growth outlook.

5. RBLX: Roblox (RBLX) declines 18.05% as growth slumps.

4. ILMN: Illumina Inc. (ILMN) loses 18.64% on weak growth outlook and China business.

3. INTC: Intel Corp. (INTC) falls 28.58% as chipmaker blames PC slowdown for weak guidance.

2. RDDT: Reddit Inc. (RDDT) loses 29% as Q3 traffic down sharply.

1. ATEC: Alphatec Holdings (ATEC) slashes 38.08% on lower revenue forecast.

Highest Gainers

10. TMUS: T-Mobile (TMUS) jumps 6.21% on raised free cash flow outlook.

9. KOS: Kosmos Energy (KOS) climbs 6.74% on bargain-hunting.

8. AZN: AstraZeneca (AZN) jumps 7.02% on strong Q3 earnings and cost-cutting plan.

7. CSGP: Costar Group (CSGP) up 7.21% on bargain-hunting after strong Q3 and higher growth outlook.

6. RKT: Rocket Companies (RKT) climbs 7.38% on earnings beat.

5. OLN: Olin Corp. (OLN) surges 9.73% on Q3 revenue growth.

4. BTSG: BrightSpring (BTSG) soars 11.08% after earnings and higher growth guidance.

3. GPN: Global Payments (GPN) jumps 12.97% on reported $40B merger with CD&R.

2. CPRI: Capri Holdings (CPRI) soars 16.31% on higher growth outlook despite revenue drop.

1. GDYN: Grid Dynamics (GDYN) soars 40.78% on strong earnings.