Biggest stock gainers: September 2026
monthly roundup · biggest single-day percent gain · 21 recorded packs · every day linked
Data provenance
Built from 21 committed daily packs: 2026-09-01 through 2026-09-30 (US regular sessions, ET).
Stock movers record begins Wednesday, June 10, 2026. Quotes delayed at least 15 min · delayed-redistributable · How we source data
Across 20 recorded trading days with gainer rows in September 2026, TGE posted the biggest single-day gain in Tapeboard's close snapshots, up 109.6% on Wednesday, September 30, 2026, closing at $1.74 on 191.0M shares.
Top movers
Biggest stock gainers: September 2026, best recorded biggest single-day percent gain
| Rank | Symbol | Best day gain | Close | Volume | Recorded |
|---|---|---|---|---|---|
| 1 | TGE | +109.6% | $1.74 | 191.0M | Sep 30, 2026 |
| 2 | BTTC | +99.5% | $0.73 | not recorded | Sep 21, 2026 |
| 3 | SNYR | +96.7% | $0.16 | 1.1B | Sep 16, 2026 |
| 4 | QNME | +89.6% | $0.55 | 326.0M | Sep 18, 2026 |
| 5 | NIVF | +85.7% | $0.13 | 850.7M | Sep 30, 2026 |
| 6 | FLYE | +85.2% | $2.52 | 80.8M | Sep 1, 2026 |
| 7 | LHSW | +84.6% | $0.80 | 344.5M | Sep 22, 2026 |
| 8 | GLND | +79.0% | $5.21 | 155.4M | Sep 24, 2026 |
| 9 | BDRX | +70.8% | $1.14 | 141.3M | Sep 11, 2026 |
| 10 | SUNE | +67.1% | $3.96 | 119.3M | Sep 9, 2026 |
How this is BUILT
How this roundup is built
This roundup is built only from the committed daily close packs for this period. For each symbol the table shows its single best recorded daily percent gain in the period, with the close price and volume from that same day. Nothing is interpolated: a session with no committed pack has no row here, and months with no packs have no roundup at all.
Recorded DAYS
Every recorded day of September 2026 (21 packs)
- Sep 30, 2026
- Sep 29, 2026
- Sep 28, 2026
- Sep 24, 2026
- Sep 23, 2026
- Sep 22, 2026
- Sep 21, 2026
- Sep 18, 2026
- Sep 17, 2026
- Sep 16, 2026
- Sep 15, 2026
- Sep 14, 2026
- Sep 11, 2026
- Sep 10, 2026
- Sep 9, 2026
- Sep 8, 2026
- Sep 7, 2026 (no rows recorded)
- Sep 4, 2026
- Sep 3, 2026
- Sep 2, 2026
- Sep 1, 2026
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