FAST · Fastenal Co

$47.02 +0.87 (+1.87%) At close · Jul 24

Market Cap

$53.96B

1.15B

Total shares sold short and not yet covered, reported to FINRA by broker-dealers twice a month. Each reading settles on the 15th and the last business day of the month and is published seven business days later — the next scheduled dates are listed at the top of the table. Days to cover divides the short position by average daily volume; a high value (above 5) can signal short-squeeze potential.

Short Squeeze Score

57/100

Short interest 2.7% of shares — P57 Days to cover 3.4 — P51 Price vs VWAP +1.3% — P66 Short-volume trend +6.2% — P66 Short interest change +1.8% — P57 Worst FTD 0.02% of shares — P48

Peer-relative percentile rank across all stocks reporting short interest at the latest settlement date (2026-07-15). 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
2026-08-14 Scheduled FINRA publishes Aug 25	—	—	—	—	—
2026-07-31 Scheduled FINRA publishes Aug 11	—	—	—	—	—
2026-07-15	31,475,902	30,905,562	+570,340	9,245,045	3.40
2026-06-30	30,905,562	31,320,552	-414,990	8,236,391	3.75
2026-06-15	31,320,552	28,459,231	+2,861,321	6,509,896	4.81
2026-05-29	28,459,231	28,159,863	+299,368	6,899,617	4.12
2026-05-15	28,159,863	24,523,768	+3,636,095	6,480,655	4.35
2026-04-30	24,523,768	24,252,255	+271,513	6,176,169	3.97
2026-04-15	24,252,255	27,514,034	-3,261,779	8,479,192	2.86
2026-03-31	27,514,034	31,136,708	-3,622,674	8,399,912	3.28
2026-03-13	31,136,708	31,926,847	-790,139	7,878,362	3.95
2026-02-27	31,926,847	33,154,548	-1,227,701	6,432,878	4.96
2026-02-13	33,154,548	34,665,326	-1,510,778	10,063,508	3.29
2026-01-30	34,665,326	31,511,673	+3,153,653	10,308,865	3.36
2026-01-15	31,511,673	31,434,778	+76,895	8,560,770	3.68
2025-12-31	31,434,778	31,452,298	-17,520	6,936,731	4.53
2025-12-15	31,452,298	29,427,595	+2,024,703	6,928,861	4.54
2025-11-28	29,427,595	27,692,749	+1,734,846	6,758,443	4.35
2025-11-14	27,692,749	26,285,149	+1,407,600	6,600,282	4.20
2025-10-31	26,285,149	23,784,347	+2,500,802	5,779,015	4.55
2025-10-15	23,784,347	25,848,771	-2,064,424	7,964,787	2.99
2025-09-30	25,848,771	24,264,136	+1,584,635	6,030,249	4.29
2025-09-15	24,264,136	25,224,369	-960,233	6,056,335	4.01
2025-08-29	25,224,369	24,709,243	+515,126	5,336,371	4.73
2025-08-15	24,709,243	25,447,460	-738,217	5,637,721	4.38
2025-07-31	25,447,460	25,333,413	+114,047	6,580,909	3.87

Showing 1–24 of 24 settlements

Key facts CIK 815556 CUSIP 311900104 13F (30d) 429 filings 412 filers Visit website Investor relations