Most Shorted Stocks Today: May 15, 2026 — Top 25 Squeeze Candidates
Enveric Biosciences (ENVB) leads Tapeboard's most shorted stocks on May 15, 2026 with a perfect 100 squeeze score, a 340.7% annualized borrow fee, and 45.7% short interest as a fraction of float.
Enveric Biosciences (ENVB) tops the Tapeboard most shorted stocks leaderboard on May 15, 2026 with a perfect 100 short squeeze score, a 340.7% annualized borrow fee, and 45.7% short interest as a fraction of free float. Groupon (GRPN) ranks second at an 82.3 score and carries today's highest raw SI on the board at 59.2% of float on a still-cheap 1.0% borrow. Twenty-four of today's top 25 names are flagged on the FINRA threshold list, signaling sustained heavy short-side volume across biotech, clean-energy, and consumer names.
May 15, 2026 Top 25 Short Squeeze Candidates
| Rank | Symbol | Squeeze Score | SI % Float | Borrow Fee | Days to Cover | T |
|---|---|---|---|---|---|---|
| 1 | ENVB | 100 | 45.7% | 340.7% | 0.1 | T |
| 2 | GRPN | 82.3 | 59.2% | 1.0% | 6.7 | T |
| 4 | RH | 69.6 | 55.8% | 0.4% | 3.2 | T |
| 5 | CLSK | 64.0 | 49.5% | 0.4% | 4.5 | T |
| 6 | RXRX | 62.7 | 34.2% | 0.8% | 15.0 | T |
| 7 | NVAX | 60.6 | 30.3% | 0.4% | 15.6 | |
| 8 | NTLA | 58.5 | 39.3% | 0.5% | 6.8 | T |
| 9 | BTDR | 57.9 | 34.7% | 0.9% | 8.2 | T |
| 11 | IBRX | 57.2 | 35.6% | 3.7% | 9.3 | T |
| 12 | EVGO | 57.1 | 33.5% | 0.7% | 11.9 | T |
| 13 | AI | 56.8 | 35.2% | 0.4% | 10.2 | T |
| 14 | PLAY | 54.1 | 34.0% | 0.5% | 4.5 | T |
| 15 | INDI | 53.9 | 29.4% | 3.4% | 13.4 | T |
| 16 | UPST | 53.0 | 32.3% | 0.4% | 6.2 | T |
| 17 | PCRX | 52.7 | 28.6% | 0.4% | 14.9 | T |
| 18 | TRIP | 52.3 | 31.9% | 0.4% | 9.1 | T |
| 19 | ARCT | 51.7 | 28.2% | 0.5% | 15.5 | T |
| 20 | LCID | 51.6 | 35.8% | 7.8% | 3.0 | T |
| 21 | CSIQ | 51.1 | 31.4% | 0.8% | 6.7 | T |
| 22 | PRME | 50.9 | 21.5% | 0.4% | 16.4 | T |
| 23 | TWST | 50.6 | 28.7% | 0.3% | 11.0 | T |
| 24 | SRPT | 50.0 | 28.3% | 0.3% | 10.1 | T |
| 26 | TGTX | 49.5 | 25.5% | 0.3% | 14.9 | T |
| 27 | BEAM | 49.0 | 31.5% | 0.3% | 9.7 | T |
| 28 | SNDX | 48.2 | 22.9% | 0.3% | 12.9 | T |
Top 5 Most Shorted Stocks on May 15, 2026
1. ENVB — Squeeze Score 100
ENVB is the textbook hard-to-borrow micro-cap: $2.25 share price, 45.7% SI of float, and an annualized borrow rate of 340.7% — meaning the yearly stock-loan cost on a short position runs more than three times the current share price. Days to cover sits at 0.1, so a single average-volume session can theoretically flatten the entire short book, but the borrow rate signals that lendable supply is effectively gone. With float utilization at 47.9%, a -21.1% 5-day move already in the tape, and the threshold flag active, any marginal buyer meets shorts who are already paying punitive carry and who would lose the ability to roll their borrow if a single lender pulls inventory.
2. GRPN — Squeeze Score 82.3
GRPN carries today's highest raw short interest at 59.2% of float, against a still-cheap 1.0% borrow fee and 6.7 days to cover at $17.50. Float utilization is 56.5% and 5-day momentum is roughly flat at -1.8%. This is the comfortable crowded short — shorts are not under fee pressure, but with nearly seven full sessions of average volume needed to exit and over half of float locked into the position, even a modest sustained rally creates a covering bottleneck where the exit price moves materially against the trade before the book is flat.
4. RH — Squeeze Score 69.6
RH is the high-conviction fundamental short on the board: 55.8% SI of float on a $123.25 mid-cap with a trivial 0.4% borrow fee and just 3.2 days to cover. Float utilization of 34.0% confirms the conviction is concentrated in a smaller pool of lenders. With the threshold flag active and borrow this cheap, shorts have no cost-side urgency — but the asymmetric setup means a single positive comp print or guidance raise can force institutional shorts to mark-to-market a 55%-of-float position in a name that takes just over three average sessions to flatten.
5. CLSK — Squeeze Score 64
CLSK is the crowded bitcoin-miner short: 49.5% SI of float, a 0.4% borrow fee, 4.5 days to cover, 36.4% float utilization, and a -7.7% 5-day momentum confirming shorts are currently in the money at $13.03. Cheap borrow lets the position be pressed indefinitely, but mining names trade as high-beta proxies to bitcoin spot — a sharp BTC move higher flips the P&L on roughly half the float at once, and the threshold flag indicates short-side volume has dominated the recent tape, which is exactly the inventory that has to unwind first.
6. RXRX — Squeeze Score 62.7
RXRX sits at $2.92 with 34.2% SI of float, a 0.8% borrow fee, and 15.0 days to cover — among the highest DTC on today's board. Float utilization is 33.4% and the threshold flag is active. This is an AI-biotech setup where the exit problem is the story: at current average volume, the short side cannot flatten in any reasonable window. A clinical readout, partnership disclosure, or platform validation forces buying into a name that already lacks natural marginal demand, and elevated DTC means each successive cover prints at progressively worse levels.
Stocks Flagged on the FINRA Threshold List
The T column marks symbols on the FINRA Consolidated NMS daily short-volume threshold list — meaning short-side trades exceeded 50% of total reported volume on at least one of the last seven trading sessions. It is a direct signal of fresh, sustained short pressure, distinct from the accumulated short interest figure. Twenty-four of today's top 25 carry the flag; the lone exception is NVAX at rank 7 with a 60.6 score. See /methodology/short-squeeze-score for how the flag feeds into the composite.
How the Tapeboard Squeeze Score Is Built
The Tapeboard score weights five inputs: 35% short interest as a percentage of float (Yahoo), 25% borrow fee (IBKR via iborrowdesk), 20% float utilization, 15% days to cover, and 5% 5-day price momentum (Schwab). The composite intentionally over-weights crowding and borrow cost because those are the mechanical drivers of forced covering — momentum is included as a small confirming signal, not a forecast. Full methodology and edge-case handling live at /methodology/short-squeeze-score.
For tomorrow's update and intraday changes to the rankings, see the live leaderboard.