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No. 14
Market temperatureSmall Cap Market Map heatVery hot

Market breadthUp1,519Down1,362Flat86Gap-ups (≥1M shares) 1,404

No. 14Closed 16:00 ETRanking stored Inside: Top movers A2 Why they moved A3 HOD timing A4 Market map & FESCI A5 Articles A6

Sections of this recap

Lead · largest opening gap

Top gappers on : GRML, GLND and BTTC

Rank 1GRMLGreenland Mines Ltd

Opening gap
+157.19%
Day
+230.53%
HOD (ET)
11.6811:21 ET
Est. turnover
$1.8B
Gap-ups (≥1M shares)
1,404

On Monday, September 21, 2026, 1,404 US-listed common stocks and common-stock ADRs opened above their previous close with at least 1M shares of daily volume. The largest opening gap was GRML at +157.19%.

GRML (Greenland Mines Ltd) opened at 7.33, +157.19% from the previous close of 2.85. Its high of day was 11.68 at 11:21 ET. It closed at 9.42, +230.53% on the day, on an estimated $1.8B of turnover. SEC filings and news were not collected for this session.

Morning: 5 of 10 highs of day.

Across the small caps the map tracks, 1,519 advanced and 1,362 declined, with an estimated $19.2B in dollar volume.

Behind it in the ranking: GLND +151.25% (+140.00% on the day); BTTC +76.44% (+117.75% on the day); VEEE +69.00% (+100.93% on the day); NCPL +57.96% (+36.36% on the day); LOBO +33.77% (+32.08% on the day); PRTH +33.53% (+33.79% on the day).

SEC filings and news were not collected for this session.

Continued in Why they moved

Stocks in focus

  1. Rank 2GLND+151.25%Day +140.00%

    Greenland Energy Co

    High of day 3.72 at 04:00 ET; estimated turnover $558.1M.

  2. Rank 3BTTC+76.44%Day +117.75%

    Black Titan Corp

    High of day 0.98 at 10:29 ET; estimated turnover $307.3M.

  3. Rank 4VEEE+69.00%Day +100.93%

    Twin Vee PowerCats, Co.

    High of day 22.85 at 10:16 ET; estimated turnover $531.6M.

  4. Rank 5NCPL+57.96%Day +36.36%

    Netcapital Inc.

    High of day 1.41 at 08:38 ET; estimated turnover $113.1M.

  5. Rank 6LOBO+33.77%Day +32.08%

    LOBO TECHNOLOGIES LTD.

    High of day 1.29 at 10:02 ET; estimated turnover $142.5M.

Stored Top Gappers ranking and HOD archive

Market map & FESCI

The Small Cap Market Map for this session loads here.Market Map data as of

Small-cap dollar volume (est.)
$19.2B

Top movers

  1. 1GRML+157.19%+230.53%
  2. 2GLND+151.25%+140.00%
  3. 3BTTC+76.44%+117.75%
  4. 4VEEE+69.00%+100.93%
  5. 5NCPL+57.96%+36.36%
  6. 6LOBO+33.77%+32.08%
  7. 7PRTH+33.53%+33.79%
  8. 8AVAT+29.63%+73.15%
  9. 9CRML+29.20%+38.63%
  10. 10USDE+28.07%+23.65%

Further reading

A diagonal gap separates stone steps from a landing, interrupting a band of sunlight.Reading the sessionGap up, gap down, and premarket change: which price are you comparing?Learn how gap up and gap down are calculated, how opening gaps differ from premarket changes, and why the reference price and timestamp matter.By Greta Ji · 4 min read

Further reading

Why they moved

SEC filings and news were not collected for this session.

HOD timing

Morning: 5 of 10 highs of day

The Gapper HOD Timeline for this session loads here.

  1. Pre-market04:00–09:303 of 10
  2. First 30 minutes09:30–10:002 of 10
  3. Morning10:00–12:005 of 10
  4. Afternoon12:00–16:000 of 10
  5. After hours16:00–20:000 of 10

Learning corner

Lessons and terms behind this session

Method

Top Gappers Calendar default method: US-listed common stocks and common-stock ADRs, daily volume ≥ 1,000,000 shares, opening gap highest first

Every session in September 2026

Retrospective data built after the session from stored records, with links to the original sources. Not real-time, not investment advice and not a recommendation to buy or sell any security.