Most Shorted Stocks Today: May 21, 2026 — Top 25 Squeeze Candidates
On May 21, 2026, Enveric Biosciences (ENVB) tops the Tapeboard short-squeeze leaderboard with a 100/100 score driven by a 246.4% annualized borrow fee and 45.7% short interest, with 21 of the top 25 names flagged on the FINRA threshold list.
On May 21, 2026, Enveric Biosciences (ENVB) leads the Tapeboard short squeeze leaderboard with a perfect 100 score, driven by a 246.4% annualized borrow fee and 45.7% short interest as a percent of float. The broader picture: 21 of the top 25 names print on the FINRA threshold list, three names carry borrow fees north of 10% annualized, and seven names show days to cover above 10 sessions — a leaderboard skewed toward sustained short pressure rather than single-session flow.
May 21, 2026 Top 25 Short Squeeze Candidates
| Rank | Symbol | Squeeze Score | SI % Float | Borrow Fee | Days to Cover | T |
|---|---|---|---|---|---|---|
| 1 | ENVB | 100 | 45.7% | 246.4% | 0.1 | |
| 2 | GRPN | 92.1 | 59.2% | 0.8% | 6.7 | T |
| 4 | RH | 76.5 | 55.8% | 0.4% | 3.2 | T |
| 5 | CLSK | 74.1 | 49.5% | 0.3% | 4.5 | T |
| 6 | RXRX | 67.5 | 34.2% | 1.0% | 15.0 | T |
| 7 | NVAX | 67.0 | 30.3% | 0.5% | 15.6 | T |
| 8 | IBRX | 66.3 | 35.6% | 6.2% | 9.3 | T |
| 9 | EVGO | 65.5 | 33.5% | 0.7% | 11.9 | T |
| 10 | BTDR | 65.2 | 34.7% | 0.9% | 8.2 | T |
| 11 | NTLA | 65.0 | 39.3% | 0.4% | 6.8 | T |
| 12 | AI | 64.4 | 35.2% | 0.3% | 10.2 | |
| 14 | INDI | 62.0 | 29.4% | 2.9% | 13.4 | T |
| 15 | PLAY | 60.7 | 34.0% | 0.5% | 4.5 | |
| 16 | LCID | 60.5 | 35.8% | 10.3% | 3.0 | T |
| 17 | PCRX | 59.9 | 28.6% | 0.4% | 14.9 | T |
| 18 | CSIQ | 59.7 | 31.4% | 0.9% | 6.7 | T |
| 19 | ZS | 58.8 | — | — | — | T |
| 21 | ARCT | 57.8 | 28.2% | 0.5% | 15.5 | T |
| 22 | TRIP | 57.7 | 31.9% | 0.4% | 9.1 | T |
| 23 | UPST | 56.8 | 32.3% | 0.4% | 6.2 | T |
| 24 | BEAM | 55.4 | 31.5% | 0.3% | 9.7 | T |
| 25 | KITT | 55.3 | 39.1% | 24.0% | 1.4 | T |
| 26 | PRME | 55.2 | 21.5% | 0.4% | 16.4 | T |
| 27 | ASAN | 55.1 | 30.9% | 0.5% | 4.5 | T |
| 28 | IOVA | 55.1 | 27.5% | 0.4% | 8.1 |
Today's Top 5 Squeeze Candidates
1. ENVB — Squeeze Score 100
ENVB (Enveric Biosciences) tops the board with the most expensive locate on the leaderboard at a 246.4% annualized borrow fee, paired with 45.7% short interest and 24.6% float utilization. The stock prints $2.21 and is not on the threshold list — days to cover sits at just 0.09 because recent volume has been heavy enough to clear the short book in hours. The squeeze mechanic here is the cost of carry, not the math of covering: at 246% annualized, every additional day a short stays open burns meaningful P&L, and any tightening of locate availability at the prime brokerage would force buy-ins as positions can't be rolled.
2. GRPN — Squeeze Score 92.1
GRPN (Groupon) carries the highest pure short interest on the board at 59.2% of float, with 57.1% float utilization and 6.65 days to cover. Borrow fee is benign at 0.79% annualized — shorts are not paying to be in the trade — but more than half the float is locked up on the short side and the stock prints $18.20 on the FINRA threshold list. This is a high-SI / low-cost configuration; the catalyst would be a positive print forcing covering against a thin available-to-borrow pool, with days-to-cover suggesting roughly a week of average volume needed to unwind.
4. RH — Squeeze Score 76.5
RH (RH, the home-furnishings retailer) shows 55.8% short interest on a 0.36% borrow fee, with 3.2 days to cover and 38.1% float utilization. The stock is up 8.77% over the trailing five sessions and prints $139.65 on the threshold list. This is the cheap-borrow / heavy-SI / positive-momentum setup — shorts have been comfortable adding into weakness, but a continuation move forces covering into a moving tape, and the low days-to-cover means the squeeze can resolve quickly once buy-ins begin.
5. CLSK — Squeeze Score 74.1
CLSK (CleanSpark) carries 49.5% short interest, a 0.30% borrow fee, 4.48 days to cover, 40.4% float utilization, and a +12.73% 5-day move. Price is $15.82 and the symbol is threshold-flagged. This is a momentum-confirmed high-SI setup in a Bitcoin-correlated name; cheap borrow keeps shorts in the trade, but continued strength in the underlying crypto tape or a forward-guidance catalyst would chase shorts against accelerating price action.
6. RXRX — Squeeze Score 67.5
RXRX (Recursion Pharmaceuticals) carries 34.2% short interest at a 1.03% borrow fee, with 15.03 days to cover — meaning the entire short book would need roughly three weeks of average volume to unwind cleanly. Float utilization is 33.4%, price is $3.10, and the name is threshold-flagged. The squeeze mechanic here is duration, not cost: any forced-cover event would chase a thin biotech tape with no easy exit, and a clinical or partnership headline would turn days-to-cover into the binding constraint.
Stocks Flagged on the FINRA Threshold List
The T flag indicates the symbol appears on the FINRA Consolidated NMS daily short-volume file with more than 50% of recent volume executed on the short side over the last seven trading days — sustained heavy short-side pressure rather than a single-session spike. Today, 21 of the top 25 names carry the flag, including all five of the top names below ENVB. See /methodology/short-squeeze-score for the exact definition.
How the Tapeboard Squeeze Score Is Built
The Tapeboard squeeze score is a 0–100 composite weighting 35% short interest as a percent of float (Yahoo Finance), 25% borrow fee (IBKR via iborrowdesk.com), 20% float utilization, 15% days to cover, and 5% trailing 5-day momentum (Schwab). Names missing one input — ZS today, for example, with no SI / fee data — are scored on the metrics that are available. The full weighting, normalization rules, and threshold-flag bonus are documented at /methodology/short-squeeze-score.
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