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RPID · Rapid Micro Biosystems, Inc. · Short Interest

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$0.79 +0.01 (+0.64%) At close · Oct 26
Rebalance outlook locked
Market Cap
$39.12M
Shares
50.16M
Volume · Oct 26 35.06K Avg daily vol (3M) 242.94K

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 →

RPID Latest Reported Short Interest

FINRA reported 888,578 RPID shares sold short as of the October 15, 2026 settlement date, an increase of 34,606 shares. Days to cover was 3.83 based on FINRA's reported average daily volume.

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

RPID Short Interest Forecast

Equibles' model estimates 847,195 shares sold short for the October 30, 2026 settlement, -4.7% versus the latest reported position, with a likely range of 724,312 to 976,581 shares. This model prediction uses FINRA data through October 26, 2026; FINRA's official release is expected November 10, 2026.

Model estimate

Expected Oct 30 short interest

as of Oct 26 Low confidence 61% chance it falls
847,195 -4.7% vs reported
Likely range 724,312 to 976,581 The latest estimate appears in the chart below. Official release expected Nov 10. Methodology
Short Squeeze Score
50/100
Short interest 1.8% of shares — P46 Days to cover 3.8 — P55 Price vs VWAP -39.3% — P8 Short-volume trend +2.5% — P62 Short interest change +4.1% — P65 Worst FTD 0.10% of shares — P83

Positioning score 50.1 + 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 (2026-10-15). 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.

No active listed options were found.

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 2026-10-27 02:16 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
    2026-11-13 Scheduled
    FINRA publishes Nov 24
    		 — — — —
    2026-10-30 Scheduled
    FINRA publishes Nov 10
    		 — — — —
    2026-10-15 888,578 853,972 +34,606 3.83
    2026-09-30 853,972 940,376 -86,404 2.28
    2026-09-15 940,376 869,421 +70,955 3.73
    2026-08-31 869,421 843,821 +25,600 4.48
    2026-08-14 843,821 825,765 +18,056 2.99
    2026-07-31 825,765 842,336 -16,571 5.05
    2026-07-15 842,336 738,469 +103,867 3.19
    2026-06-30 738,469 613,997 +124,472 3.70
    2026-06-15 613,997 748,445 -134,448 4.86
    2026-05-29 748,445 659,825 +88,620 3.91
    2026-05-15 659,825 808,896 -149,071 5.16
    2026-04-30 808,896 543,866 +265,030 4.18
    2026-04-15 543,866 377,502 +166,364 2.94
    2026-03-31 377,502 317,445 +60,057 1.36
    2026-03-13 317,445 216,880 +100,565 1.35
    2026-02-27 216,880 177,566 +39,314 2.16
    2026-02-13 177,566 166,073 +11,493 1.00
    2026-01-30 166,073 178,556 -12,483 1.00
    2026-01-15 178,556 178,907 -351 1.00
    2025-12-31 178,907 161,309 +17,598 1.22
    2025-12-15 161,309 238,781 -77,472 1.52
    2025-11-28 238,781 301,487 -62,706 2.35
    2025-11-14 301,487 310,680 -9,193 1.87
    2025-10-31 310,680 322,737 -12,057 3.78

    Full FINRA short interest reporting calendar

    Showing 1–24 of 24 settlements
    Key facts CIK 1380106 CUSIP 75340L104 13F (30d) 22 filings 5 filers Visit website Investor relations