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HALO · Halozyme Therapeutics, Inc. · Short Interest

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$124.54 -0.29 (-0.23%)
S&P 400 member Russell 1000 member Rebalance outlook locked
Market Cap
$14.17B
Shares
113.50M
Volume · Oct 22 5.1M Avg daily vol (3M) 2.31M

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 →

HALO Latest Reported Short Interest

FINRA reported 15,295,841 HALO shares sold short as of the September 30, 2026 settlement date, an increase of 141,427 shares. Days to cover was 4.54 based on FINRA's reported average daily volume.

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

HALO Short Interest Forecast

Equibles' model estimates 16,692,899 shares sold short for the October 15, 2026 settlement, +9.1% versus the latest reported position, with a likely range of 14,715,659 to 19,075,083 shares. This model prediction uses FINRA data through October 15, 2026; FINRA's official release is expected October 26, 2026.

Model estimate

Expected Oct 15 short interest

as of Oct 15 High confidence 64% chance it rises
16,692,899 +9.1% vs reported
Likely range 14,715,659 to 19,075,083 The latest estimate appears in the chart below. Official release expected Oct 26. Methodology
Short Squeeze Score
82/100
Short interest 13.5% of shares — P93 Days to cover 4.5 — P66 Price vs VWAP +16.6% — P96 Short-volume trend +27.4% — P97 Short interest change +0.9% — P53 Worst FTD 0.02% of shares — P60

Positioning score 81.5 + 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 (2026-09-30). 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 2026-10-22 23:09 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.

1M 3M 6M 1Y 5Y All
Dimensions
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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 15,295,841 15,154,414 +141,427 4.54
    2026-09-15 15,154,414 14,880,707 +273,707 11.59
    2026-08-31 14,880,707 14,636,927 +243,780 8.69
    2026-08-14 14,636,927 14,022,134 +614,793 5.01
    2026-07-31 14,022,134 13,295,961 +726,173 8.35
    2026-07-15 13,295,961 13,226,223 +69,738 7.27
    2026-06-30 13,226,223 12,948,289 +277,934 6.27
    2026-06-15 12,948,289 13,644,245 -695,956 7.84
    2026-05-29 13,644,245 13,389,887 +254,358 8.12
    2026-05-15 13,389,887 14,381,741 -991,854 6.72
    2026-04-30 14,381,741 14,257,845 +123,896 10.22
    2026-04-15 14,257,845 14,046,350 +211,495 10.57
    2026-03-31 14,046,350 13,701,015 +345,335 9.41
    2026-03-13 13,701,015 13,498,344 +202,671 8.40
    2026-02-27 13,498,344 13,795,570 -297,226 6.14
    2026-02-13 13,795,570 13,515,827 +279,743 6.46
    2026-01-30 13,515,827 13,593,503 -77,676 9.07
    2026-01-15 13,593,503 13,800,472 -206,969 6.10
    2025-12-31 13,800,472 12,500,858 +1,299,614 9.89
    2025-12-15 12,500,858 12,372,896 +127,962 4.44
    2025-11-28 12,372,896 12,479,411 -106,515 6.06
    2025-11-14 12,479,411 11,305,141 +1,174,270 3.91
    2025-10-31 11,305,141 11,510,110 -204,969 7.65

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1159036 CUSIP 40637H109 13F (30d) 136 filings 133 filers Visit website Investor relations