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MRNA · Moderna, Inc.

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$138.89 +0.90 (+0.65%) At close · Aug 31
S&P 500 member Russell 1000 member Rebalance outlook locked
Market Cap
$55.09B
Shares
399.24M

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

MRNA Latest Reported Short Interest

FINRA reported 52,809,184 MRNA shares sold short as of the August 14, 2026 settlement date, an increase of 3,040,302 shares. Days to cover was 9.15 based on FINRA's reported average daily volume.

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

MRNA Short Interest Forecast

Equibles' model estimates 57,544,271 shares sold short for the August 31, 2026 settlement, +9.0% versus the latest reported position. This model prediction uses FINRA data through August 21, 2026; FINRA's official release is expected September 10, 2026.

Model estimate

Expected Aug 31 short interest

as of Aug 21
57,544,271 +9.0% vs reported
The latest estimate appears in the chart below. Official release expected Sep 10. Methodology
Short Squeeze Score
85/100
Short interest 13.2% of shares — P94 Days to cover 9.2 — P88 Price vs VWAP +20.4% — P93 Short-volume trend +3.2% — P63 Short interest change +6.1% — P71 Worst FTD 0.11% of shares — P84

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 52,809,184 49,768,882 +3,040,302 9.15
    2026-07-31 49,768,882 52,401,842 -2,632,960 10.22
    2026-07-15 52,401,842 53,185,640 -783,798 6.07
    2026-06-30 53,185,640 58,664,960 -5,479,320 4.61
    2026-06-15 58,664,960 57,806,124 +858,836 10.48
    2026-05-29 57,806,124 58,071,415 -265,291 12.27
    2026-05-15 58,071,415 58,309,643 -238,228 5.63
    2026-04-30 58,309,643 59,437,562 -1,127,919 10.15
    2026-04-15 59,437,562 60,649,602 -1,212,040 11.45
    2026-03-31 60,649,602 66,188,177 -5,538,575 9.05
    2026-03-13 66,188,177 70,233,907 -4,045,730 6.16
    2026-02-27 70,233,907 71,341,687 -1,107,780 8.08
    2026-02-13 71,341,687 71,505,698 -164,011 6.55
    2026-01-30 71,505,698 70,268,867 +1,236,831 4.54
    2026-01-15 70,268,867 68,321,865 +1,947,002 5.29
    2025-12-31 68,321,865 69,679,477 -1,357,612 6.89
    2025-12-15 69,679,477 68,075,313 +1,604,164 6.90
    2025-11-28 68,075,313 64,356,094 +3,719,219 7.27
    2025-11-14 64,356,094 63,656,197 +699,897 5.66
    2025-10-31 63,656,197 65,036,951 -1,380,754 5.23
    2025-10-15 65,036,951 64,337,988 +698,963 6.92
    2025-09-30 64,337,988 63,310,000 +1,027,988 5.57
    2025-09-15 63,310,000 59,842,399 +3,467,601 4.85

    Full FINRA short interest reporting calendar

    Showing 1–23 of 23 settlements
    Key facts CIK 1682852 CUSIP 60770K107 13F (30d) 538 filings 514 filers Visit website Investor relations

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