ALT · Altimmune, Inc.

$2.81 -0.06 (-2.09%) At close · Jul 20

Market Cap

$546.47M

194.47M

Total shares sold short and not yet covered, reported to FINRA by broker-dealers and published twice a month (bi-monthly). Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.

Short Squeeze Score

78/100

Short interest 24.5% of shares — P99 Days to cover 8.1 — P93 Price vs VWAP -3.8% — P43 Short-volume trend +2.7% — P62 Short interest change +13.6% — P71 Worst FTD 0.08% of shares — P72

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-06-30). 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.

1M 3M 6M 1Y 5Y All

Short Interest History

Settlement Date	Current Position	Previous Position	Change	Avg Daily Volume	Days to Cover
2026-06-30	47,634,141	41,927,428	+5,706,713	5,904,250	8.07
2026-06-15	41,927,428	39,121,187	+2,806,241	2,878,363	14.57
2026-05-29	39,121,187	37,637,361	+1,483,826	2,704,753	14.46
2026-05-15	37,637,361	35,446,379	+2,190,982	3,416,478	11.02
2026-04-30	35,446,379	28,734,631	+6,711,748	7,192,208	4.93
2026-04-15	28,734,631	29,248,014	-513,383	2,095,235	13.71
2026-03-31	29,248,014	26,485,081	+2,762,933	3,820,795	7.65
2026-03-13	26,485,081	25,499,023	+986,058	3,807,152	6.96
2026-02-27	25,499,023	25,131,694	+367,329	2,556,547	9.97
2026-02-13	25,131,694	24,163,422	+968,272	3,471,785	7.24
2026-01-30	24,163,422	26,407,860	-2,244,438	6,907,580	3.50
2026-01-15	26,407,860	25,810,012	+597,848	6,232,330	4.24
2025-12-31	25,810,012	23,718,017	+2,091,995	5,502,996	4.69
2025-12-15	23,718,017	23,157,756	+560,261	3,799,388	6.24
2025-11-28	23,157,756	23,285,097	-127,341	3,289,773	7.04
2025-11-14	23,285,097	21,780,366	+1,504,731	3,270,364	7.12
2025-10-31	21,780,366	21,503,786	+276,580	2,504,764	8.70
2025-10-15	21,503,786	26,194,292	-4,690,506	2,968,083	7.25
2025-09-30	26,194,292	25,084,923	+1,109,369	3,012,028	8.70
2025-09-15	25,084,923	26,765,712	-1,680,789	1,905,221	13.17
2025-08-29	26,765,712	25,460,460	+1,305,252	3,116,352	8.59
2025-08-15	25,460,460	25,760,339	-299,879	2,783,367	9.15
2025-07-31	25,760,339	28,097,407	-2,337,068	3,274,029	7.87

Showing 1–23 of 23 settlements

Key facts CIK 1326190 CUSIP 02155H200 13F (30d) 15 filings 15 filers Visit website Investor relations