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Builders FirstSource (BLDR) Short Interest Ratio & Short Volume

Builders FirstSource logo
$65.69 +1.52 (+2.36%)
As of 01:41 PM Eastern
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Builders FirstSource Short Interest Overview

As of August 14, 2026, Builders FirstSource (BLDR) had a short interest of 7.26 million shares sold short, representing 6.94% of the public float. This marks a -9.34% decrease in short interest since the prior report. The short interest ratio (days to cover) is 3.8, meaning it would take 3.8 days of the average trading volume of 2.38 million shares to cover all short positions.

Current Short Interest
7,264,682 shares
Previous Short Interest
8,013,450 shares
Change Vs. Previous Month
-9.34%
Dollar Volume Sold Short
$526.83 million
Short Interest Ratio
3.8 Days to Cover
Last Record Date
August 14, 2026
Outstanding Shares
107,600,000 shares
Short Percent of Float
6.94%
Today's Trading Volume
854,696 shares
Average Trading Volume
2,381,032 shares
Today's Volume Vs. Average
36%
Short Selling Builders FirstSource?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

BLDR Short Interest Over Time

BLDR Days to Cover Over Time

BLDR Percentage of Float Shorted Over Time

Builders FirstSource Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
8/14/20267,264,682 shares $526.83 million -9.3%6.9%3.75 $72.52
7/31/20268,013,450 shares $532.39 million +11.3%7.7%3.05 $66.44
7/15/20267,200,190 shares $548.44 million -5.3%6.9%3.61 $76.17
6/30/20267,603,336 shares $680.59 million -4.2%7.3%2.87 $89.51
6/15/20267,936,719 shares $616.29 million -9.8%7.6%3.57 $77.65
5/29/20268,797,863 shares $670.41 million +1.3%8.4%2.59 $76.20
5/15/20268,682,445 shares $609.84 million +7.7%8.3%2.85 $70.24
4/30/20268,059,726 shares $638.17 million +11.5%7.7%3.14 $79.18
4/15/20267,230,744 shares $614.88 million +2.1%6.9%3.75 $85.04
3/31/20267,084,828 shares $582.83 million +7.3%6.8%3.28 $82.27
3/13/20266,603,493 shares $581.77 million +18.4%6.1%2.19 $88.10
2/27/20265,576,445 shares $580.30 million +18.7%5.3%2.63 $104.06
2/13/20264,698,707 shares $540.61 million +4.2%4.5%1.73 $115.06
1/30/20264,508,345 shares $515.57 million -5.2%4.2%2.42 $114.36
1/15/20264,753,876 shares $612.06 million -0.3%4.4%2.12 $128.75
12/31/20254,765,888 shares $490.36 million +4.1%4.4%3.21 $102.89
12/15/20254,578,394 shares $479.18 million -10.6%4.2%2.55 $104.66
11/28/20255,122,241 shares $574.87 million -8.1%4.7%1.97 $112.23
11/14/20255,573,309 shares $575.47 million -5.3%5.1%2.2 $103.25
10/31/20255,884,781 shares $684.24 million -6.2%5.4%3.27 $116.27
10/15/20256,280,000 shares $793.29 million -8.5%5.8%3.2 $126.32
9/30/20256,860,000 shares $831.16 million -14.5%6.4%3.4 $121.16
9/15/20258,020,000 shares $1.12 billion +12.8%7.5%3.7 $140.23
8/31/20257,110,000 shares $986.37 million +9.4%6.6%3.2 $138.73
8/15/20256,500,000 shares $890.63 million +7.8%6.1%2.9 $137.02
7/31/20256,030,000 shares $768.20 million -12.0%5.6%2.7 $127.40
7/15/20256,850,000 shares $863.13 million +11.0%6.4%3.2 $126.01
6/30/20256,170,000 shares $720.84 million -6.8%5.7%2.8 $116.83
6/15/20256,620,000 shares $735.95 million +8.5%6.2%3.3 $111.17
5/31/20256,100,000 shares $656.36 million +25.0%5.7%3.2 $107.60
5/15/20254,880,000 shares $575.21 million +13.2%4.5%2.6 $117.87
4/30/20254,310,000 shares $514.10 million +10.5%4.0%2.4 $119.28
4/15/20253,900,000 shares $461.58 million -7.1%3.5%2.3 $118.36
3/31/20254,200,000 shares $524.84 million -14.8%3.8%2.4 $124.96
3/15/20254,930,000 shares $622.15 million +18.8%4.4%2.8 $126.20
2/28/20254,150,000 shares $576.97 million +20.3%3.7%2.5 $139.03
2/15/20253,450,000 shares $530.96 million -14.4%3.1%2.2 $153.90
1/31/20254,030,000 shares $674.16 million +15.5%3.6%2.8 $167.29
1/15/20253,490,000 shares $563.18 million +10.4%3.1%2.4 $161.37
12/31/20243,160,000 shares $451.66 million +22.0%2.8%2.4 $142.93
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12/15/20242,590,000 shares $431.05 million +22.8%2.3%2 $166.43
11/30/20242,110,000 shares $393.45 million -7.5%1.9%1.6 $186.47
11/15/20242,280,000 shares $401.92 million -8.1%2.0%1.7 $176.28
10/31/20242,480,000 shares $425.07 million -9.5%2.2%1.8 $171.40
10/15/20242,740,000 shares $536.27 million -6.2%2.4%1.8 $195.72
9/30/20242,920,000 shares $566.07 million -18.2%2.6%1.7 $193.86
9/15/20243,570,000 shares $654.38 million -1.4%3.1%1.9 $183.30
8/31/20243,620,000 shares $629.88 million +11.0%3.2%2 $174.00
8/15/20243,260,000 shares $536.99 million +21.2%2.9%1.7 $164.72
7/31/20242,690,000 shares $450.23 million -7.9%2.4%1.2 $167.37
7/15/20242,920,000 shares $447.26 million -6.1%2.4%1.4 $153.17
6/30/20243,110,000 shares $430.46 million +2.3%2.6%1.6 $138.41
6/15/20243,040,000 shares $454.63 million -19.8%2.5%1.7 $149.55
5/31/20243,790,000 shares $609.39 million +21.9%3.2%2.3 $160.79
5/15/20243,110,000 shares $534.73 million +20.5%2.6%2 $171.94
4/30/20242,580,000 shares $471.68 million -3.4%2.2%1.8 $182.82
4/15/20242,670,000 shares $492.37 million -1.8%2.2%2.1 $184.41
3/31/20242,720,000 shares $567.26 million -13.1%2.3%2.3 $208.55
3/15/20243,130,000 shares $611.92 million -5.2%2.6%2.5 $195.50
2/29/20243,300,000 shares $643.63 million -3.5%2.8%1.9 $195.04
2/15/20243,420,000 shares $639.64 million No Change2.9%1.9 $187.03
1/31/20243,420,000 shares $594.26 million -3.9%2.8%1.9 $173.76
1/15/20243,560,000 shares $595.91 million -5.1%3.0%1.8 $167.39
12/31/20233,750,000 shares $626.03 million -12.0%3.1%1.9 $166.94
12/15/20234,260,000 shares $694.55 million -1.2%3.5%2.1 $163.04
11/30/20234,310,000 shares $577.54 million -4.2%3.6%2.7 $134.00
11/15/20234,500,000 shares $579.51 million -14.6%3.7%2.9 $128.78
10/31/20235,270,000 shares $571.90 million +22.6%4.4%3.4 $108.52
10/15/20234,300,000 shares $499.96 million -1.8%3.5%2.9 $116.27
9/30/20234,380,000 shares $545.27 million +5.5%3.6%3 $124.49
9/15/20234,150,000 shares $527.63 million -2.1%3.4%2.7 $127.14
8/31/20234,240,000 shares $615.22 million -4.5%3.5%2.4 $145.10
8/15/20234,440,000 shares $669.51 million +23.7%3.6%2.2 $150.79
7/31/20233,590,000 shares $518.58 million No Change2.9%1.7 $144.45
7/15/20233,590,000 shares $506.76 million -8.9%2.9%1.6 $141.16
6/30/20233,940,000 shares $535.64 million -30.8%3.2%1.6 $135.95
6/15/20235,690,000 shares $699.98 million +14.0%4.6%2.3 $123.02
5/31/20234,990,000 shares $577.74 million +2.5%4.0%2.1 $115.78
5/15/20234,870,000 shares $575.44 million -1.4%3.9%2.2 $118.16
4/30/20234,940,000 shares $468.16 million -9.4%4.4%2.3 $94.77
4/15/20235,450,000 shares $514.26 million +29.2%4.0%2.8 $94.36
3/31/20234,220,000 shares $374.65 million +0.5%3.1%2.3 $88.78
3/15/20234,200,000 shares $334.03 million +3.5%3.1%2.3 $79.53
2/28/20234,060,000 shares $344.21 million -6.5%3.0%2.3 $84.78
2/15/20234,340,000 shares $363.61 million -13.7%3.0%2.5 $83.78
1/31/20235,030,000 shares $400.89 million -10.0%3.5%2.7 $79.70
1/15/20235,590,000 shares $402.09 million -5.1%3.9%3.1 $71.93
12/30/20225,890,000 shares $382.14 million -4.5%4.1%3 $64.88
12/15/20226,170,000 shares $421.23 million -2.1%4.3%3 $68.27
11/30/20226,300,000 shares $402.76 million +0.3%4.4%2.9 $63.93
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Jim Rickards believes the Trump administration is about to take a direct stake in a $2 stock sitting on the largest mineral reserve in the country - enough gold for a new Fort Knox, enough copper to rebuild the U.S. electric grid 25 times over. The Trump administration has previously staked positions in MP Materials, Lithium America, Trilogy Metals, and USA Rare Earth - each time shares moved higher. A landmark policy decision expected before November 3 could reprice this stock from $2 to $20 or more within a year.tc pixel

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11/15/20226,280,000 shares $402.30 million -7.9%4.3%3 $64.06
10/31/20226,820,000 shares $420.52 million -7.2%4.4%3.3 $61.66
10/15/20227,350,000 shares $426.01 million -6.0%4.8%3.4 $57.96
9/30/20227,820,000 shares $460.75 million -15.1%5.1%3.5 $58.92
9/15/20229,210,000 shares $509.31 million +17.3%6.0%4 $55.30
8/31/20227,850,000 shares $460.09 million +2.9%5.1%3.2 $58.61
8/15/20227,630,000 shares $531.51 million -7.5%5.0%2.9 $69.66
7/31/20228,250,000 shares $561 million -0.7%4.9%2.9 $68.00
7/15/20228,310,000 shares $530.51 million +9.5%4.9%2.9 $63.84
6/30/20227,590,000 shares $407.58 million +6.8%4.5%2.6 $53.70
6/15/20227,110,000 shares $394.32 million -3.5%4.2%2.4 $55.46
5/31/20227,370,000 shares $479.71 million +21.6%4.4%2.8 $65.09
5/15/20226,060,000 shares $405.35 million -10.8%3.6%2.2 $66.89
4/30/20226,790,000 shares $418.06 million -5.7%3.9%2.7 $61.57
4/15/20227,200,000 shares $440.35 million +4.7%4.2%2.8 $61.16
3/31/20226,880,000 shares $444.04 million -0.9%4.0%2.7 $64.54
3/15/20226,940,000 shares $509.12 million +15.7%4.0%2.8 $73.36
2/28/20226,000,000 shares $446.52 million -4.8%3.5%2.2 $74.42
2/15/20226,300,000 shares $449.44 million -2.5%3.6%2.4 $71.34
1/31/20226,460,000 shares $439.22 million +10.1%3.4%2.4 $67.99
1/15/20225,870,000 shares $461.85 million +0.2%3.1%2.2 $78.68
12/31/20215,860,000 shares $502.26 million -16.6%3.1%2.3 $85.71
12/15/20217,030,000 shares $550.17 million -13.0%3.7%3 $78.26

BLDR Short Interest - Frequently Asked Questions

Short interest is the volume of Builders FirstSource shares that have been sold short but have not yet been closed out or covered. As of August 14th, traders have sold 7,264,682 shares of BLDR short. 6.94% of Builders FirstSource's shares are currently sold short. Learn More on Builders FirstSource's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. BLDR shares currently have a short interest ratio of 3.8. Learn More on Builders FirstSource's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 6.94% of Builders FirstSource's floating shares are currently sold short.

Builders FirstSource saw a decline in short interest during the month of August. As of August 14th, there was short interest totaling 7,264,682 shares, a decline of 9.3% from the previous total of 8,013,450 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

6.94% of Builders FirstSource's shares are currently sold short. Here is how the short interest of companies compare to Builders FirstSource: UFP Industries, Inc. (3.65%), Boise Cascade, L.L.C. (4.26%), Fortune Brands Innovations, Inc. (5.51%), KB Home (12.76%), Lennar Corporation (7.96%), PulteGroup, Inc. (4.55%), Tecnoglass Inc. (3.23%), Toll Brothers Inc. (3.90%), Williams-Sonoma, Inc. (4.55%), Carlisle Companies Incorporated (5.46%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.57 billion), Invesco QQQ ($46.97 billion), iShares Russell 2000 ETF ($24.02 billion), Nebius Group N.V. ($15.37 billion), Sandisk Corporation ($12.60 billion), SPDR S&P Biotech ETF ($12.14 billion), Western Digital Corporation ($10.32 billion), iShares 20+ Year Treasury Bond ETF ($8.38 billion), VanEck Semiconductor ETF ($7.62 billion), and iShares iBoxx $ High Yield Corporate Bond ETF ($7.07 billion). View all of the most shorted stocks.

Short selling BLDR is an investing strategy that aims to generate trading profit from Builders FirstSource as its price is falling. BLDR shares are trading up $1.05 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for Builders FirstSource occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of BLDR, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including BLDR, twice per month. The most recent reporting period available is August, 14 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like BLDR:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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Short Interest Tools

Short interest data for NYSE:BLDR is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/25/2026. FINRA publishes updated short interest twice a month.
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