XOOMAR

SPDR S&P 500 ETF TRUST (SPY)

Every FINRA and SEC series the site collects for SPDR S&P 500 ETF TRUST: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE.

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81.7M

Short interest

settlement 2026-08-31

2.2

Days to cover

-11.4% vs prior

43.1%

Short share of volume

2026-09-17

55,184

Fails to deliver

settlement 2026-08-31

As of 2026-09-17.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 31 August 2026, short interest in SPY is 81,719,964 shares, down 12,647,975 shares over the last month. Over the last 48 readings it ranged from 81,719,964 shares (31 August 2026) to 133,961,230 shares (31 March 2026). The latest reading sits at the bottom of that range. At the reported average volume of 36.5M shares a day that is 2.2 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-3181,719,964-11.4%36,546,3102.24
2026-08-1492,190,734-2.3%43,194,6192.13
2026-07-3194,367,939-2.5%51,300,0581.84
2026-07-1596,827,747-11.8%44,940,3592.15
2026-06-30109,815,483+7.3%64,365,1681.71
2026-06-15102,343,601-4.7%61,042,0221.68
2026-05-29107,433,983-1.6%45,870,0282.34
2026-05-15109,192,514-8.8%48,391,1002.26
2026-04-30119,797,329-4.2%50,213,6802.39
2026-04-15125,003,596-6.7%64,418,7051.94
2026-03-31133,961,230+13.7%108,330,9591.24
2026-03-13117,848,132+15.1%93,765,3161.26
2026-02-27102,395,225-15.1%76,590,5001.34
2026-02-13120,648,942+10.2%92,565,5351.30
2026-01-30109,516,152+2.0%83,540,2221.31
2026-01-15107,394,148+6.5%76,513,5611.40
2025-12-31100,831,310-11.2%76,747,8241.31
2025-12-15113,484,446+1.7%73,814,7931.54
2025-11-28111,561,040-5.6%96,831,4361.15
2025-11-14118,178,899+8.7%79,318,5331.49
2025-10-31108,765,577+11.2%76,522,6281.42
2025-10-1597,853,277-14.3%78,477,1311.25
2025-09-30114,193,765+2.3%80,850,6981.41
2025-09-15111,615,053-1.7%71,699,1001.56

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 17 September 2026, the short share of SPY volume is 43.1%, down 20.1 points over the last five sessions. Over the last 52 readings it ranged from 43.0% (14 September 2026) to 74.2% (7 August 2026). The latest reading sits at the bottom of that range. The latest reading is 16.7 points below the 30-session average of 59.9%, on 15.1M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-176.5M15.1M43.1%648,535
2026-09-1612.1M21.8M55.6%67,471
2026-09-1511.1M17.9M62.0%60,777
2026-09-147.6M17.8M43.0%27,259
2026-09-1110.1M15.6M64.7%51,725
2026-09-1010.0M15.8M63.3%30,691
2026-09-096.6M11.2M58.9%19,792
2026-09-086.7M12.0M56.0%3,102
2026-09-047.2M12.4M58.0%5,151
2026-09-038.0M14.5M55.2%27,476
2026-09-024.2M8.5M49.1%13,454
2026-09-017.1M12.9M55.3%43,942
2026-08-316.9M11.3M61.1%15,457
2026-08-288.4M12.7M66.0%24,228
2026-08-277.1M13.2M53.6%7,530
2026-08-265.0M9.4M53.2%6,997
2026-08-256.7M10.7M63.1%6,829
2026-08-246.7M9.9M67.2%42,833
2026-08-219.4M16.9M55.7%8,262
2026-08-208.6M15.3M56.0%7,771
2026-08-197.0M13.9M50.2%22,579
2026-08-189.7M16.3M59.4%16,631
2026-08-178.9M12.1M73.6%23,016
2026-08-147.0M11.0M63.9%9,669
2026-08-138.5M12.5M67.8%15,320
2026-08-127.4M10.6M69.6%10,327
2026-08-118.1M12.4M65.4%9,290
2026-08-109.6M14.1M68.0%4,022
2026-08-0711.0M14.8M74.2%11,509
2026-08-068.6M13.5M63.9%12,427

Fails to deliver

SEC, by settlement date. JSON

As of 31 August 2026, the fails-to-deliver balance in SPY is 55,184 shares, down 286,439 shares over the last settlement date. Over the last 52 readings it ranged from 11 shares (23 July 2026) to 5,672,220 shares (18 June 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-3155,184$769.35$42.5M
2026-08-26341,623$765.91$261.7M
2026-08-2545,244$763.47$34.5M
2026-08-2469,190$765.72$53.0M
2026-08-2150,033$762.60$38.2M
2026-08-20165$769.06$127K
2026-08-18395,625$772.67$305.7M
2026-08-17445,339$776.34$345.7M
2026-08-144,421$777.88$3.4M
2026-08-136,930$772.49$5.4M
2026-08-12104,562$770.56$80.6M
2026-08-1134,256$773.03$26.5M
2026-08-109,862$773.26$7.6M
2026-08-06121,537$769.79$93.6M
2026-08-0520,296$771.33$15.7M
2026-08-0412,711$757.67$9.6M
2026-08-03126,414$747.03$94.4M
2026-07-312,600$741.69$1.9M
2026-07-2999$740.86$73K
2026-07-288,989$739.09$6.6M
2026-07-241,599$738.18$1.2M
2026-07-2311$747.41$8K
2026-07-22507$748.28$379K
2026-07-20101,344$743.29$75.3M
2026-07-172,701$750.72$2.0M
2026-07-164,579$754.81$3.5M
2026-07-157,361$751.83$5.5M
2026-07-142,828$749.17$2.1M
2026-07-135,161$754.95$3.9M
2026-07-1051,271$751.71$38.5M

13F holders

Tracked managers holding SPY at their latest 13F. JSON

13 of the 30 tracked managers held SPY at their latest 13F, $88.38B in total at quarter-end prices. Citadel Advisors is the largest at $59.25B (6.8% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 3 cut.

FundQuarterSharesValueOf portfolioChange in shares
Citadel Advisors2026-06-3079.3M$59.25B6.77%+14.8M
D. E. Shaw & Co.2026-06-3014.0M$10.48B4.98%+12.4M
Millennium Management2026-06-3013.9M$10.39B3.76%+9.0M
Bridgewater Associates2026-06-305.3M$3.97B16.30%+955K
Point72 Asset Management2026-06-303.0M$2.23B2.46%+492K
Two Sigma Investments2026-06-301.1M$857.4M0.62%+331K
AQR Capital Management2026-06-301.1M$854.9M0.30%+228K
Renaissance Technologies2026-06-30219K$163.6M0.23%new or n/a
Soros Fund Management2026-06-30100K$74.7M0.92%-1.1M
Duquesne Family Office2026-06-3090K$67.2M1.29%0
Third Point2026-06-3040K$28.8M0.62%new or n/a
Fisher Asset Management2026-06-3016K$11.9M0.00%-744
ARK Investment Management2026-06-300$3440.00%-28

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

SPDR S&P 500 ETF TRUST in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows SPDR S&P 500 ETF TRUST (SPY), SEC CIK 884394, listed on NYSE. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-17.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-31.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Company record
EDGAR filing index for CIK 884394Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 18 Sep 05:40 UTC.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other company pages

Datasets

Frequently Asked Questions

How much of SPY is sold short?
81,719,964 shares were held short at the 2026-08-31 settlement, 2.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is SPY's daily short volume?
On 2026-09-17, 6,503,853 of the 15,077,531 SPY shares reported to FINRA were sold short, 43.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does SPY have fails to deliver?
The SEC's latest file shows 55,184 SPY shares failed to deliver at settlement 2026-08-31. Fails are reported per settlement date and published twice a month with a lag.
Are SPY insiders buying or selling?
No Form 4 filings for SPY are on record.
Which funds hold SPY?
13 of the 30 tracked managers held SPY at their latest 13F, $88.38B in total at quarter-end prices. Citadel Advisors is the largest at $59.25B (6.8% of its portfolio) as of 2026-06-30. Over the prior quarter 7 added shares and 3 cut.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.