These are the biggest stock movers from Thursday’s US session (July 23, 2026) — one up and one down for each market-cap tier. TSLA -14.52% led overall in the mega-cap bucket. Each ticker block has the catalyst (or an honest “no clear catalyst” if there isn’t one) plus what a pattern-recognition algorithm would actually flag in the move — base breakout, momentum continuation, failed breakdown, sympathy selloff, or noise.

Mega-cap movers (Companies above $200B)

↑ TMO +8.71%

$572.32 · Mega-cap · $3.0B traded

Why: Thermo Fisher beat Q2 earnings and revenue estimates, with analysts highlighting standout performance in its core businesses that lifted shares sharply in a tough tape.

Pattern: Strong gap-up on nearly $3B in dollar volume breaks TMO out of a multi-month consolidation range — clean earnings breakout if it holds above the prior ceiling.

↓ TSLA -14.52%

$319.69 · Mega-cap · $36.4B traded

Why: Tesla led a broad Magnificent 7 selloff that erased ~$800B in market value, the group’s worst session since April 2025, amid renewed AI spending doubts and profit-taking.

Pattern: Massive volume day ($36B+) slices through near-term support — looks like a momentum reversal after a parabolic run, not a buyable dip until a base forms.

Large-cap movers ($10B to $200B)

↑ RTX +7.33%

$209.16 · Large-cap · $1.8B traded

Why: RTX posted a Q2 earnings beat with strong growth across segments and raised its full-year outlook, joining Lockheed Martin in a defense-sector breakout session.

Pattern: Earnings gap pushes RTX to new highs on elevated volume — textbook breakout from a tight ascending base, clean continuation pattern for trend followers.

↓ CMCSA -6.80%

$21.92 · Large-cap · $1.1B traded

Why: Despite beating earnings estimates, Comcast sold off as persistent broadband subscriber losses overshadowed a 25% jump in media revenue ahead of the NBCUniversal separation.

Pattern: Sell-the-news reaction on a stock already in a long-term downtrend — no base structure to support a bounce, more likely continuation lower.

Mid-cap movers ($2B to $10B)

↑ FCEL +3.69%

$23.30 · Mid-cap · $271M traded

Why: FuelCell Energy drifted higher on continued data-center and hydrogen narrative interest, though recent analysis suggests shares may already be fully valued after a recent equity raise.

Pattern: Modest +3.7% move on moderate volume looks like noise within a wide trading range — no clean breakout or base completion, choppy price action persists.

↓ OPEN -12.21%

$3.85 · Mid-cap · $330M traded

Why: No clear catalyst — Opendoor dropped sharply with no major headlines, likely caught in the broader risk-off rotation hitting speculative and rate-sensitive names.

Pattern: Heavy volume selloff in a low-priced name already near multi-year lows — breakdown pattern with no visible support structure, classic falling-knife setup.

Small-cap movers ($300M to $2B)

↑ HUT +7.11%

$117.67 · Small-cap · $717M traded

Why: Hut 8 rallied after Morgan Stanley backed the stock and highlighted the AI data-center pivot as a catalyst for upside across bitcoin mining names.

Pattern: Strong volume day ($717M) on an analyst endorsement — HUT is building a higher-low pattern, and this move tests resistance from the prior swing high.

↓ MVIS -8.23%

$0.28 · Small-cap · $2M traded

Why: No clear catalyst — MicroVision continued its slide on thin $2.4M dollar volume, drifting lower with no news to arrest the decline.

Pattern: Sub-$1 stock on minimal volume grinding toward all-time lows — no technical structure to trade, just persistent distribution with no buyers stepping in.

Today’s biggest stock movers — bottom line

Thursday’s tape was mixed — even split between up- and down-movers across the cap tiers. The Movers recap drops daily Tue-Sat morning Melbourne time, covering the prior US session’s biggest stock movers in every cap tier — mega, large, mid, and small.

Read next: Daily Stock Movers · Gamma Squeeze Mechanics · What Is a P/E Ratio?