Soleno Therapeutics Inc
SLNODelisted May 18, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001484565
Soleno Therapeutics Inc was delisted on May 18, 2026; its insiders filed their last Form 4 on May 18, 2026; 230 institutions reported holding it in 13F filings for Q1 2026, worth $2.09B in total; no superinvestor held it.
Four kinds of short-selling data, each measuring something different:
- Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
- Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
- Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
- ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.
More in the glossary.
Short interest
Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.
- Short interest
- 4.41M
- Shares, settlement May 15, 2026
- Change
- −2.12M
- −32.5% vs. Apr 30, 2026
- Days to cover
- 2.31
- Short interest ÷ average daily volume
- Average daily volume
- 1.91M
- Shares, as reported by FINRA
| Settlement date | Short interest | Change | Change % | Avg. daily volume | Days to cover |
|---|---|---|---|---|---|
| May 15, 2026 | 4.41M | −2.12M | −32.5% | 1.91M | 2.31 |
| Apr 30, 2026 | 6.53M | +726.2K | +12.5% | 2.27M | 2.88 |
| Apr 15, 2026 | 5.80M | −2.65M | −31.4% | 11.6M | 1.00 |
| Mar 31, 2026 | 8.45M | −878.9K | −9.4% | 1.58M | 5.36 |
| Mar 13, 2026 | 9.33M | +459.0K | +5.2% | 1.69M | 5.52 |
| Feb 27, 2026 | 8.87M | −833.0K | −8.6% | 1.39M | 6.40 |
| Feb 13, 2026 | 9.70M | −732.9K | −7.0% | 1.47M | 6.61 |
| Jan 30, 2026 | 10.4M | −1.04M | −9.0% | 1.43M | 7.32 |
| Jan 15, 2026 | 11.5M | +543.6K | +5.0% | 2.00M | 5.74 |
| Dec 31, 2025 | 10.9M | +1.68M | +18.1% | 1.14M | 9.58 |
| Dec 15, 2025 | 9.25M | +158.7K | +1.8% | 1.49M | 6.21 |
| Nov 28, 2025 | 9.09M | −636.8K | −6.5% | 1.65M | 5.50 |
| Nov 14, 2025 | 9.73M | +1.25M | +14.7% | 3.29M | 2.96 |
| Oct 31, 2025 | 8.48M | +49.3K | +0.6% | 1.30M | 6.51 |
| Oct 15, 2025 | 8.44M | −190.0K | −2.2% | 1.45M | 5.80 |
| Sep 30, 2025 | 8.63M | +1.38M | +19.0% | 2.59M | 3.33 |
| Sep 15, 2025 | 7.25M | −335.4K | −4.4% | 2.19M | 3.30 |
| Aug 29, 2025 | 7.58M | +1.27M | +20.2% | 1.24M | 6.13 |
| Aug 15, 2025 | 6.31M | +267.0K | +4.4% | 1.90M | 3.32 |
| Jul 31, 2025 | 6.04M | +174.8K | +3.0% | 1.10M | 5.50 |
| Jul 15, 2025 | 5.87M | +512.2K | +9.6% | 1.63M | 3.61 |
| Jun 30, 2025 | 5.35M | +1.29M | +31.7% | 1.44M | 3.73 |
| Jun 13, 2025 | 4.06M | +75.8K | +1.9% | 676.4K | 6.01 |
| May 30, 2025 | 3.99M | −157.0K | −3.8% | 620.5K | 6.43 |
| May 15, 2025 | 4.15M | −18.3K | −0.4% | 837.2K | 4.95 |
| Apr 30, 2025 | 4.16M | −847.1K | −16.9% | 950.0K | 4.38 |
| Apr 15, 2025 | 5.01M | +349.9K | +7.5% | 1.72M | 2.92 |
| Mar 31, 2025 | 4.66M | −327.1K | −6.6% | 2.93M | 1.59 |
| Mar 14, 2025 | 4.99M | +180.2K | +3.8% | 695.1K | 7.18 |
| Feb 28, 2025 | 4.81M | +267.0K | +5.9% | 435.6K | 11.04 |
| Feb 14, 2025 | 4.54M | +191.6K | +4.4% | 402.9K | 11.27 |
| Jan 31, 2025 | 4.35M | −382.4K | −8.1% | 386.5K | 11.25 |
| Jan 15, 2025 | 4.73M | +140.2K | +3.1% | 497.4K | 9.51 |
| Dec 31, 2024 | 4.59M | +164.4K | +3.7% | 646.4K | 7.10 |
| Dec 13, 2024 | 4.43M | −129.2K | −2.8% | 683.1K | 6.48 |
| Nov 29, 2024 | 4.56M | −185.1K | −3.9% | 744.4K | 6.12 |
| Nov 15, 2024 | 4.74M | −1.43M | −23.2% | 496.2K | 9.56 |
| Oct 31, 2024 | 6.17M | +459.9K | +8.1% | 563.4K | 10.95 |
| Oct 15, 2024 | 5.71M | +749.1K | +15.1% | 969.5K | 5.89 |
| Sep 30, 2024 | 4.96M | +297.5K | +6.4% | 527.3K | 9.41 |
| Sep 13, 2024 | 4.66M | +175.7K | +3.9% | 402.6K | 11.59 |
| Aug 30, 2024 | 4.49M | +517.0K | +13.0% | 756.1K | 5.94 |
| Aug 15, 2024 | 3.97M | +11.3K | +0.3% | 392.1K | 10.13 |
| Jul 31, 2024 | 3.96M | −34.2K | −0.9% | 306.8K | 12.91 |
| Jul 15, 2024 | 3.99M | +482.8K | +13.8% | 427.3K | 9.35 |
| Jun 28, 2024 | 3.51M | +154.5K | +4.6% | 985.9K | 3.56 |
| Jun 14, 2024 | 3.36M | −45.4K | −1.3% | 315.9K | 10.63 |
| May 31, 2024 | 3.40M | +221.8K | +7.0% | 335.3K | 10.15 |
| May 15, 2024 | 3.18M | −233.7K | −6.9% | 507.9K | 6.26 |
Fails-to-deliver
Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.
| Settlement date | Shares | Price | Value |
|---|---|---|---|
| May 20, 2026 | 201 | $53.01 | $10.7K |
| May 19, 2026 | 64,409 | $53.01 | $3.41M |
| May 18, 2026 | 64,482 | $53.01 | $3.42M |
| May 15, 2026 | 194,854 | $52.99 | $10.3M |
| May 14, 2026 | 34,067 | $52.95 | $1.80M |
| May 13, 2026 | 9,562 | $52.93 | $506.1K |
| May 7, 2026 | 4,600 | $52.94 | $243.5K |
| May 6, 2026 | 598 | $52.92 | $31.6K |
| May 5, 2026 | 281 | $52.90 | $14.9K |
| May 1, 2026 | 465 | $52.82 | $24.6K |
| Apr 20, 2026 | 5,647 | $52.78 | $298.0K |
| Apr 10, 2026 | 8,027 | $52.51 | $421.5K |
| Apr 6, 2026 | 1,187 | $39.49 | $46.9K |
| Mar 30, 2026 | 25,443 | $30.05 | $764.6K |
| Mar 27, 2026 | 240,354 | $31.86 | $7.66M |
| Feb 27, 2026 | 1,300 | $38.09 | $49.5K |
| Feb 20, 2026 | 665 | $39.41 | $26.2K |
| Feb 6, 2026 | 293 | $39.58 | $11.6K |
| Feb 4, 2026 | 6,944 | $43.98 | $305.4K |
| Jan 27, 2026 | 555 | $42.81 | $23.8K |
| Jan 20, 2026 | 182 | $42.48 | $7.73K |
| Jan 14, 2026 | 75 | $41.51 | $3.11K |
| Jan 8, 2026 | 53,613 | $44.39 | $2.38M |
| Dec 18, 2025 | 600 | $49.25 | $29.6K |
| Dec 17, 2025 | 39,395 | $49.50 | $1.95M |
| Dec 16, 2025 | 193 | $49.95 | $9.64K |
| Dec 15, 2025 | 1,470 | $52.00 | $76.4K |
| Dec 8, 2025 | 3,107 | $51.37 | $159.6K |
| Dec 4, 2025 | 911 | $50.72 | $46.2K |
| Dec 1, 2025 | 240 | $50.45 | $12.1K |
Daily short volume
Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.
The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.
| Trade date | Short volume | Short exempt | Off-exchange volume | Short volume ratio |
|---|---|---|---|---|
| May 15, 2026 | 134,565 | 0 | 440,187 | 30.6% |
| May 14, 2026 | 87,552 | 0 | 349,085 | 25.1% |
| May 13, 2026 | 67,576 | 0 | 293,049 | 23.1% |
| May 12, 2026 | 121,042 | 16 | 651,523 | 18.6% |
| May 11, 2026 | 114,769 | 1 | 294,388 | 39.0% |
| May 8, 2026 | 99,967 | 1 | 377,437 | 26.5% |
| May 7, 2026 | 235,054 | 6,875 | 646,671 | 36.3% |
| May 6, 2026 | 151,069 | 93 | 576,665 | 26.2% |
| May 5, 2026 | 379,172 | 0 | 570,050 | 66.5% |
| May 4, 2026 | 347,413 | 0 | 931,276 | 37.3% |
| May 1, 2026 | 127,197 | 19 | 323,129 | 39.4% |
| Apr 30, 2026 | 189,221 | 0 | 318,171 | 59.5% |
| Apr 29, 2026 | 92,286 | 0 | 1,302,238 | 7.1% |
| Apr 28, 2026 | 160,633 | 295 | 434,917 | 36.9% |
| Apr 27, 2026 | 107,860 | 0 | 392,624 | 27.5% |
| Apr 24, 2026 | 208,495 | 2 | 2,034,712 | 10.2% |
| Apr 23, 2026 | 242,831 | 147 | 507,249 | 47.9% |
| Apr 22, 2026 | 172,382 | 3,501 | 351,472 | 49.0% |
| Apr 21, 2026 | 314,863 | 198 | 611,340 | 51.5% |
| Apr 20, 2026 | 314,333 | 411 | 974,992 | 32.2% |
| Apr 17, 2026 | 273,868 | 1 | 1,587,596 | 17.3% |
| Apr 16, 2026 | 287,292 | 1,545 | 1,287,238 | 22.3% |
| Apr 15, 2026 | 158,269 | 31 | 1,709,176 | 9.3% |
| Apr 14, 2026 | 334,604 | 2,201 | 1,974,833 | 16.9% |
| Apr 13, 2026 | 437,056 | 486 | 1,011,224 | 43.2% |
| Apr 10, 2026 | 121,265 | 368 | 1,649,842 | 7.4% |
| Apr 9, 2026 | 1,325,813 | 4,944 | 3,819,332 | 34.7% |
| Apr 8, 2026 | 891,394 | 539 | 4,124,175 | 21.6% |
| Apr 7, 2026 | 1,070,925 | 8,552 | 10,392,544 | 10.3% |
| Apr 6, 2026 | 3,933,424 | 17,362 | 18,967,782 | 20.7% |
ATS (dark pool) volume
Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.
| Week of | Tier | ATS shares | ATS trades | Other OTC shares | Other OTC trades | ATS share |
|---|---|---|---|---|---|---|
| May 11, 2026 | T2 | 1,277,755 | 18,225 | 3,164,604 | 2,557 | 28.8% |
| May 4, 2026 | T2 | 1,598,141 | 21,699 | 1,555,944 | 4,367 | 50.7% |
| Apr 27, 2026 | T2 | 1,337,175 | 20,903 | 2,030,343 | 3,339 | 39.7% |
| Apr 20, 2026 | T2 | 2,230,697 | 23,681 | 3,230,943 | 5,163 | 40.8% |
| Apr 13, 2026 | T2 | 4,399,837 | 37,417 | 4,161,416 | 6,304 | 51.4% |
| Apr 6, 2026 | T2 | 20,008,145 | 124,038 | 26,122,661 | 23,044 | 43.4% |
| Mar 30, 2026 | T2 | 3,138,903 | 43,005 | 2,058,694 | 6,723 | 60.4% |
| Mar 23, 2026 | T2 | 2,028,834 | 37,120 | 1,957,543 | 5,358 | 50.9% |
| Mar 16, 2026 | T2 | 2,240,550 | 39,077 | 653,530 | 5,111 | 77.4% |
| Mar 9, 2026 | T2 | 3,162,412 | 49,063 | 1,277,225 | 6,672 | 71.2% |
| Mar 2, 2026 | T2 | 2,453,789 | 39,183 | 1,015,807 | 4,763 | 70.7% |
| Feb 23, 2026 | T2 | 2,991,249 | 48,323 | 851,992 | 5,174 | 77.8% |