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UNP · Union Pacific Corp · Short Interest

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$273.85 -0.31 (-0.11%)
S&P 500 member Russell 1000 member Rebalance outlook locked
Market Cap
$162.65B
Shares
594.08M
Volume · Sep 30 1.12M Avg daily vol (3M) 2.66M

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 →

UNP Latest Reported Short Interest

FINRA reported 27,430,602 UNP shares sold short as of the September 15, 2026 settlement date, a decrease of 309,771 shares. Days to cover was 14.38 based on FINRA's reported average daily volume.

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

UNP Short Interest Forecast

Equibles' model estimates 27,537,657 shares sold short for the September 30, 2026 settlement, +0.4% versus the latest reported position, with a likely range of 25,096,008 to 29,899,526 shares. This model prediction uses FINRA data through September 29, 2026; FINRA's official release is expected October 9, 2026.

Model estimate

Expected Sep 30 short interest

as of Sep 29 Low confidence 60% chance it falls
27,537,657 +0.4% vs reported
Likely range 25,096,008 to 29,899,526 The latest estimate appears in the chart below. Official release expected Oct 9. Methodology
Short Squeeze Score
63/100
Short interest 4.6% of shares — P69 Days to cover 14.4 — P94 Price vs VWAP -5.8% — P49 Short-volume trend +1.3% — P51 Short interest change -1.1% — P38 Worst FTD 0.00% of shares — P41

Positioning score 62.6 + 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 2026-09-30 19:26 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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Dimensions
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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 27,430,602 27,740,373 -309,771 14.38
    2026-08-31 27,740,373 25,944,217 +1,796,156 10.75
    2026-08-14 25,944,217 26,281,287 -337,070 11.74
    2026-07-31 26,281,287 28,233,358 -1,952,071 6.86
    2026-07-15 28,233,358 28,484,157 -250,799 12.49
    2026-06-30 28,484,157 29,458,961 -974,804 9.34
    2026-06-15 29,458,961 29,652,815 -193,854 11.71
    2026-05-29 29,652,815 28,916,554 +736,261 7.84
    2026-05-15 28,916,554 29,367,094 -450,540 11.90
    2026-04-30 29,367,094 26,536,709 +2,830,385 7.88
    2026-04-15 26,536,709 28,203,927 -1,667,218 10.76
    2026-03-31 28,203,927 26,520,645 +1,683,282 9.46
    2026-03-13 26,520,645 27,857,473 -1,336,828 9.26
    2026-02-27 27,857,473 28,109,310 -251,837 8.51
    2026-02-13 28,109,310 26,543,751 +1,565,559 5.96
    2026-01-30 26,543,751 25,275,570 +1,268,181 6.42
    2026-01-15 25,275,570 24,820,661 +454,909 9.15
    2025-12-31 24,820,661 24,315,985 +504,676 11.30
    2025-12-15 24,315,985 22,308,388 +2,007,597 7.01
    2025-11-28 22,308,388 20,809,880 +1,498,508 6.87
    2025-11-14 20,809,880 19,914,219 +895,661 6.83
    2025-10-31 19,914,219 18,338,494 +1,575,725 5.78
    2025-10-15 18,338,494 17,205,349 +1,133,145 6.14
    2025-09-30 17,205,349 14,491,431 +2,713,918 3.09

    Full FINRA short interest reporting calendar

    Showing 1–24 of 24 settlements
    Key facts CIK 100885 CUSIP 907818108 13F (30d) 52 filings 33 filers Visit website Investor relations