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WDC · Western Digital Corp · Short Interest

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$454.46 +0.98 (+0.22%) At close · Sep 30
S&P 500 member Nasdaq-100 member Russell 1000 member Rebalance outlook locked
Market Cap
$164.70B
Shares
360.54M
Volume · Sep 30 6.96M Avg daily vol (3M) 7.27M

Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.

Pull short interest history through the short interest API or MCP →

WDC Latest Reported Short Interest

FINRA reported 17,280,387 WDC shares sold short as of the September 15, 2026 settlement date, a decrease of 2,607,404 shares. Days to cover was 3.13 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent splits of this listing

WDC Short Interest Forecast

Equibles' model estimates 17,737,750 shares sold short for the September 30, 2026 settlement, +2.6% versus the latest reported position, with a likely range of 15,375,505 to 20,379,106 shares. This model prediction uses FINRA data through September 30, 2026; FINRA's official release is expected October 9, 2026.

Model estimate

Expected Sep 30 short interest

as of Sep 30 Low confidence 52% chance it rises
17,737,750 +2.6% vs reported
Likely range 15,375,505 to 20,379,106 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
53/100
Short interest 4.8% of shares — P70 Days to cover 3.1 — P46 Price vs VWAP -7.0% — P45 Short-volume trend +3.5% — P61 Short interest change -13.1% — P18 Worst FTD 0.01% of shares — P46

Positioning score 52.7 + catalyst boost 0 (total capped at 100). This is a screening index, not a probability of a squeeze.

Method and coverage limits

Factor percentiles compare eligible primary operating-company stocks reporting short interest at the latest settlement date (2026-09-15). The weighted mean uses short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, and fails-to-deliver 10%. Missing factors redistribute their weight; incomplete coverage is not evidence of low risk. Price, volume, and earnings boosts add 10 each, capped at 20.

Shares outstanding are not free float. Borrow fees, utilization, lendable supply, recalls, and dealer inventory are not measured. Short-sale volume does not measure the change in open shorts; fails to deliver are not a borrow-cost measurement; price vs VWAP does not establish short sellers' entry prices. Earnings can move prices in either direction.

The weights are judgment-based, not calibrated to future squeeze outcomes. The separate options assessment below does not change this universe ranking.

Options positioning & squeeze sensitivity

Nearest expiration after today within 30 calendar days; same-day expirations and later maturities are excluded.

Open interest is incomplete, stale, or dated inconsistently; positioning totals are unavailable.

Open interest has both a buyer and a seller; it does not reveal dealer hedge direction. Gross gamma sums both calls and puts without netting and uses a local 1% price-change approximation. It measures sensitivity, not predicted buying or a squeeze probability.

Assessment prepared 2026-10-01 04:58 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 Scheduled
    FINRA publishes Oct 9
    		 — — — —
    2026-09-15 17,280,387 19,887,791 -2,607,404 3.13
    2026-08-31 19,887,791 20,281,115 -393,324 3.14
    2026-08-14 20,281,115 24,599,617 -4,318,502 2.26
    2026-07-31 24,599,617 23,258,520 +1,341,097 3.18
    2026-07-15 23,258,520 22,377,149 +881,371 3.43
    2026-06-30 22,377,149 26,449,406 -4,072,257 1.62
    2026-06-15 26,449,406 31,871,127 -5,421,721 3.87
    2026-05-29 31,871,127 29,765,534 +2,105,593 5.02
    2026-05-15 29,765,534 29,140,914 +624,620 3.50
    2026-04-30 29,140,914 26,758,181 +2,382,733 4.18
    2026-04-15 26,758,181 26,653,778 +104,403 3.56
    2026-03-31 26,653,778 27,567,965 -914,187 2.81
    2026-03-13 27,567,965 29,882,601 -2,314,636 3.53
    2026-02-27 29,882,601 31,585,632 -1,703,031 3.36
    2026-02-13 31,585,632 31,540,967 +44,665 2.67
    2026-01-30 31,540,967 33,513,366 -1,972,399 2.95
    2026-01-15 33,513,366 36,866,308 -3,352,942 3.50
    2025-12-31 36,866,308 31,351,861 +5,514,447 4.54
    2025-12-15 31,351,861 30,825,377 +526,484 4.77
    2025-11-28 30,825,377 33,625,289 -2,799,912 3.93
    2025-11-14 33,625,289 31,956,205 +1,669,084 3.40
    2025-10-31 31,956,205 34,186,289 -2,230,084 3.10
    2025-10-15 34,186,289 36,849,266 -2,662,977 3.29

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 106040 CUSIP 958102105 13F (30d) 27 filings 20 filers Visit website Investor relations