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No. 11
Market temperatureSmall Cap Market Map heatVery hot

Market breadthUp1,041Down1,847Flat84Gap-ups (≥1M shares) 1,104

No. 11Closed 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 : ZTG, MEDS and DLXY

2 of the top 10 had an SEC filing or a trading halt between the previous close and this session’s close.

Rank 1ZTGZenta Group Co Ltd

Opening gap
+243.24%
Day
+75.33%
HOD (ET)
3.6207:25 ET
Est. turnover
$236.4M
Gap-ups (≥1M shares)
1,104

On Wednesday, September 16, 2026, 1,104 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 ZTG at +243.24%.

ZTG (Zenta Group Co Ltd) opened at 2.31, +243.24% from the previous close of 0.673. Its high of day was 3.62 at 07:25 ET. It closed at 1.18, +75.33% on the day, on an estimated $236.4M of turnover. By the close the record held 6-K at 02:03 ET: Form 6-K filed with the SEC.

Pre-market: 3 of 10 highs of day.

Across the small caps the map tracks, 1,041 advanced and 1,847 declined, with an estimated $18.8B in dollar volume.

Behind it in the ranking: MEDS +149.07% (+274.69% on the day); DLXY +145.78% (+451.81% on the day); RETO +61.43% (-34.29% on the day); TPST +41.65% (+60.18% on the day); BENF +37.00% (+36.06% on the day); YFOR +25.71% (+22.86% on the day).

2 of the top 10 had an SEC filing or a trading halt between the previous close and this session’s close.

Continued in Why they moved

Stocks in focus

  1. Rank 2MEDS+149.07%Day +274.69%

    DataMeds AI, Inc.8-K

    Form 8-K filed with the SEC

    SEC EDGAR

  2. Rank 3DLXY+145.78%Day +451.81%

    Delixy Holdings Ltd

    High of day 4.45 at 12:40 ET; estimated turnover $277.0M.

  3. Rank 4RETO+61.43%Day -34.29%

    ReTo Eco-Solutions, Inc.

    High of day 20.85 at 11:16 ET; estimated turnover $1.2B.

  4. Rank 5TPST+41.65%Day +60.18%

    Tempest Therapeutics, Inc.

    High of day 1.48 at 14:19 ET; estimated turnover $122.3M.

  5. Rank 6BENF+37.00%Day +36.06%

    Beneficient

    High of day 1.32 at 12:44 ET; estimated turnover $155.9M.

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.)
$18.8B

Top movers

  1. 1ZTG+243.24%+75.33%
  2. 2MEDS+149.07%+274.69%
  3. 3DLXY+145.78%+451.81%
  4. 4RETO+61.43%-34.29%
  5. 5TPST+41.65%+60.18%
  6. 6BENF+37.00%+36.06%
  7. 7YFOR+25.71%+22.86%
  8. 8MGN+24.75%+3.26%
  9. 9JZXN+24.30%+20.56%
  10. 10WAFU+22.30%+6.47%

Today’s feature

A tablet and stylus on a silver desk, with research content softened by a window reflection.Research processA stock suddenly moves: how do you establish what happened?Research why a stock moved using company announcements, SEC filings, and a source-linked timeline. Separate confirmed events from explanations and unknowns.By Mike Captain · 6 min read

Why they moved

2 of the top 10 had an SEC filing or a trading halt between the previous close and this session’s close.

HOD timing

Pre-market: 3 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 minutes09:30–10:000 of 10
  3. Morning10:00–12:003 of 10
  4. Afternoon12:00–16:003 of 10
  5. After hours16:00–20:001 of 10

Learning corner

Lessons and terms behind this session

Further reading

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.