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AMPX · Amprius Technologies, Inc. · Short Interest

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$8.18 +0.27 (+3.41%) At close · Oct 23
Russell 2000 member Rebalance outlook locked
Market Cap
$1.21B
Shares
146.08M
Volume · Oct 23 6.16M Avg daily vol (3M) 5.59M

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 →

AMPX Latest Reported Short Interest

FINRA reported 22,815,859 AMPX shares sold short as of the September 30, 2026 settlement date, an increase of 130,381 shares. Days to cover was 3.80 based on FINRA's reported average daily volume.

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

AMPX Short Interest Forecast

Equibles' model estimates 22,802,119 shares sold short for the October 15, 2026 settlement, -0.1% versus the latest reported position, with a likely range of 20,422,097 to 25,416,373 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 Low confidence 49% chance it rises
22,802,119 -0.1% vs reported
Likely range 20,422,097 to 25,416,373 The latest estimate appears in the chart below. Official release expected Oct 26. Methodology
Short Squeeze Score
64/100
Short interest 15.6% of shares — P95 Days to cover 3.8 — P58 Price vs VWAP -16.8% — P27 Short-volume trend +3.4% — P66 Short interest change +0.6% — P52 Worst FTD 0.01% of shares — P50

Positioning score 64.3 + 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 2026-10-24 16:07 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
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 Scheduled
    FINRA publishes Oct 26
    		 — — — —
    2026-09-30 22,815,859 22,685,478 +130,381 3.80
    2026-09-15 22,685,478 23,159,125 -473,647 5.08
    2026-08-31 23,159,125 22,146,891 +1,012,234 5.28
    2026-08-14 22,146,891 23,928,102 -1,781,211 3.09
    2026-07-31 23,928,102 28,034,609 -4,106,507 4.16
    2026-07-15 28,034,609 26,309,329 +1,725,280 4.22
    2026-06-30 26,309,329 22,816,138 +3,493,191 3.21
    2026-06-15 22,816,138 25,637,309 -2,821,171 3.13
    2026-05-29 25,637,309 22,692,523 +2,944,786 2.35
    2026-05-15 22,692,523 23,225,858 -533,335 2.24
    2026-04-30 23,225,858 21,551,498 +1,674,360 2.72
    2026-04-15 21,551,498 17,909,138 +3,642,360 2.96
    2026-03-31 17,909,138 17,846,503 +62,635 2.27
    2026-03-13 17,846,503 19,141,715 -1,295,212 1.28
    2026-02-27 19,141,715 17,042,918 +2,098,797 3.20
    2026-02-13 17,042,918 17,620,761 -577,843 1.86
    2026-01-30 17,620,761 17,246,418 +374,343 1.79
    2026-01-15 17,246,418 16,283,031 +963,387 2.48
    2025-12-31 16,283,031 13,292,515 +2,990,516 2.75
    2025-12-15 13,292,515 13,514,161 -221,646 2.67
    2025-11-28 13,514,161 16,066,241 -2,552,080 2.29
    2025-11-14 16,066,241 15,356,669 +709,572 1.66
    2025-10-31 15,356,669 16,851,368 -1,494,699 1.84

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1899287 CUSIP 03214Q108 13F (30d) 36 filings 36 filers Visit website Investor relations