Biomarin Pharmaceutical Inc. short interest
Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back. Brokers submit it twice a month, and days to cover is how many days of normal trading it would take to buy them all back.
Short interest in Biomarin Pharmaceutical Inc. was 10.1 million shares at the 15 September 2026 settlement, up 2.0% on the previous settlement, with 5.53 days to cover at an average daily volume of 1.8 million shares, as reported to FINRA.
| Settlement | Shares short | Change | Average daily volume | Days to cover |
|---|---|---|---|---|
| 15 September 2026 | 10,075,655 | +2.0% | 1,822,750 | 5.53 |
| 31 August 2026 | 9,877,553 | -3.2% | 1,713,708 | 5.76 |
| 14 August 2026 | 10,202,950 | -18.4% | 2,767,411 | 3.69 |
| 31 July 2026 | 12,504,131 | -12.7% | 1,684,263 | 7.42 |
| 15 July 2026 | 14,315,984 | +2.9% | 1,409,304 | 10.16 |
| 30 June 2026 | 13,908,847 | +11.1% | 2,301,848 | 6.04 |
| 15 June 2026 | 12,516,448 | +7.8% | 2,066,601 | 6.06 |
| 29 May 2026 | 11,605,279 | +2.2% | 2,921,395 | 3.97 |
| 15 May 2026 | 11,359,229 | +5.2% | 2,096,087 | 5.42 |
| 30 April 2026 | 10,792,859 | +6.3% | 1,482,676 | 7.28 |
| 15 April 2026 | 10,151,216 | +14.9% | 1,581,415 | 6.42 |
| 31 March 2026 | 8,832,493 | +3.9% | 2,100,926 | 4.20 |
FINRA publishes consolidated short interest twice a month, about ten days after each settlement.
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Days to cover is shares short over average daily volume. Short interest as a share of the float is not shown: the float is not in the public record.Source
FINRA equity short interest data, the public dataset.
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