Biggest stock gainers: October 2026
monthly roundup · biggest single-day percent gain · 17 recorded packs · every day linked
Data provenance
Built from 17 committed daily packs: 2026-10-01 through 2026-10-23 (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 17 recorded trading days with gainer rows in October 2026, MI posted the biggest single-day gain in Tapeboard's close snapshots, up 506.7% on Monday, October 5, 2026, closing at $5.40 on 165.5M shares.
Top movers
Biggest stock gainers: October 2026, best recorded biggest single-day percent gain
| Rank | Symbol | Best day gain | Close | Volume | Recorded |
|---|---|---|---|---|---|
| 1 | MI | +506.7% | $5.40 | 165.5M | Oct 5, 2026 |
| 2 | WFF | +342.4% | $9.07 | 143.3M | Oct 9, 2026 |
| 3 | TCRT | +253.3% | $3.71 | 251.3M | Oct 13, 2026 |
| 4 | JBDI | +200.0% | $2.91 | 91.7M | Oct 13, 2026 |
| 5 | AMOD | +199.1% | $3.50 | 192.6M | Oct 2, 2026 |
| 6 | MNDR | +190.6% | $2.47 | 191.4M | Oct 12, 2026 |
| 7 | SDEV | +127.3% | $8.32 | 147.9M | Oct 2, 2026 |
| 8 | SHFS | +120.0% | $0.33 | 933.8M | Oct 22, 2026 |
| 9 | WORX | +118.1% | $3.01 | 117.3M | Oct 19, 2026 |
| 10 | YMAT | +107.0% | $2.65 | 84.9M | Oct 12, 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 October 2026 (17 packs)
- Oct 23, 2026
- Oct 22, 2026
- Oct 21, 2026
- Oct 20, 2026
- Oct 19, 2026
- Oct 16, 2026
- Oct 15, 2026
- Oct 14, 2026
- Oct 13, 2026
- Oct 12, 2026
- Oct 9, 2026
- Oct 8, 2026
- Oct 7, 2026
- Oct 6, 2026
- Oct 5, 2026
- Oct 2, 2026
- Oct 1, 2026
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