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PRLB · Proto Labs Inc

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$78.91 +0.42 (+0.54%)
S&P 600 member Russell 2000 member Rebalance outlook locked
Market Cap
$1.88B
Shares
23.92M

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

PRLB Latest Reported Short Interest

FINRA reported 656,363 PRLB shares sold short as of the August 14, 2026 settlement date, a decrease of 19,127 shares. Days to cover was 2.99 based on FINRA's reported average daily volume.

Official FINRA short-interest data · share counts are restated for subsequent stock splits

PRLB Short Interest Forecast

Equibles' model estimates 642,371 shares sold short for the August 31, 2026 settlement, -2.1% versus the latest reported position, with a likely range of 551,751 to 730,567 shares. This model prediction uses FINRA data through August 31, 2026; FINRA's official release is expected September 10, 2026.

Model estimate

Expected Aug 31 short interest

as of Aug 31 High confidence 70% chance it falls
642,371 -2.1% vs reported
Likely range 551,751 to 730,567 The latest estimate appears in the chart below. Official release expected Sep 10. Methodology
Short Squeeze Score
51/100
Short interest 2.7% of shares — P57 Days to cover 3.0 — P49 Price vs VWAP -1.4% — P49 Short-volume trend +1.6% — P57 Short interest change -2.8% — P42 Worst FTD 0.00% of shares — P39

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-08-14). Weighted mean of the available factors (short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, fails-to-deliver 10%) plus catalyst boosts (price spike, volume surge, earnings within days), capped at +20 and clamped to 100.

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    • Short Interest History

    Settlement Date Current Position Previous Position Change Days to Cover
    2026-09-15 Scheduled
    FINRA publishes Sep 24
    		 — — — —
    2026-08-31 Scheduled
    FINRA publishes Sep 10
    		 — — — —
    2026-08-14 656,363 675,490 -19,127 2.99
    2026-07-31 675,490 676,418 -928 4.11
    2026-07-15 676,418 679,916 -3,498 2.76
    2026-06-30 679,916 700,174 -20,258 2.21
    2026-06-15 700,174 644,067 +56,107 3.33
    2026-05-29 644,067 643,691 +376 3.34
    2026-05-15 643,691 612,973 +30,718 2.88
    2026-04-30 612,973 647,664 -34,691 4.49
    2026-04-15 647,664 630,613 +17,051 4.46
    2026-03-31 630,613 586,703 +43,910 3.82
    2026-03-13 586,703 540,900 +45,803 3.44
    2026-02-27 540,900 535,467 +5,433 3.10
    2026-02-13 535,467 515,791 +19,676 1.76
    2026-01-30 515,791 456,341 +59,450 2.95
    2026-01-15 456,341 461,538 -5,197 3.47
    2025-12-31 461,538 542,670 -81,132 2.80
    2025-12-15 542,670 601,534 -58,864 4.65
    2025-11-28 601,534 703,045 -101,511 3.73
    2025-11-14 703,045 609,446 +93,599 2.79
    2025-10-31 609,446 593,032 +16,414 2.54
    2025-10-15 593,032 631,522 -38,490 3.40
    2025-09-30 631,522 688,674 -57,152 3.16
    2025-09-15 688,674 680,732 +7,942 4.83

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1443669 CUSIP 743713109 13F (30d) 219 filings 218 filers Visit website Investor relations

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