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Simplex Trading, LLC

SEC CIK
0001488542
Latest filing
Aug 12, 2026

The latest 13F from Simplex Trading, LLC covers Q2 2026 (filed Aug 12, 2026): 2,733 long positions worth $3.83B. The top 10 holdings make up 32.9% of the portfolio, and the largest is NVIDIA Corp (NVDA) at 7.9%. Livermore has 23 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
1043
Est. +$783.3M
Added
870
Est. +$1.07B
Reduced
816
Est. −$1.21B
Sold out
923
Est. −$520.3M

Top 5 holdings

Share of this quarter's portfolio value

  1. NVDANVIDIA Corp
    7.9%$304.3MHistory
  2. iShares Russell 2000 ETF464287655
    4.2%$161.3M
  3. iShares Tr464287432
    4.2%$160.8M
  4. GOOGLAlphabet Inc.
    3.4%$131.6MHistory
  5. iShares Semiconductor ETF464287523
    2.7%$103.5M

Biggest buys

New and added positions, by estimated amount bought

  1. iShares Russell 2000 ETF464287655
    +$156.4MAdded
  2. iShares Tr464287432
    +$108.3MAdded
  3. AAPLApple Inc.
    +$63.6MAddedHistory
  4. MUMicron Technology Inc
    +$60.8MNewHistory
  5. TSLATesla, Inc.
    +$54.9MAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. iShares Russell 2000 ETF464287655
    +4.08 pp0.1% → 4.2%
  2. iShares Tr464287432
    +2.56 pp1.6% → 4.2%
  3. AAPLApple Inc.
    +1.65 pp0.3% → 2.0%History
  4. MUMicron Technology Inc
    +1.59 pp0.0% → 1.6%History
  5. iShares Semiconductor ETF464287523
    +1.52 pp1.2% → 2.7%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. AMDAdvanced Micro Devices Inc
    −$130.4MReducedHistory
  2. SPYSPDR S&P 500 ETF Trust
    −$111.5MReducedHistory
  3. TSMTaiwan Semiconductor Manufacturing Co Ltd
    −$97.6MReducedHistory
  4. METAMeta Platforms, Inc.
    −$95.5MReducedHistory
  5. UNHUnitedHealth Group Inc
    −$92.1MReducedHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. METAMeta Platforms, Inc.
    −3.18 pp4.1% → 0.9%History
  2. SPYSPDR S&P 500 ETF Trust
    −3.04 pp4.1% → 1.0%History
  3. AMZNAmazon Com Inc
    −2.41 pp4.9% → 2.5%History
  4. GLDSPDR Gold Trust
    −2.34 pp3.1% → 0.7%History
  5. TSMTaiwan Semiconductor Manufacturing Co Ltd
    −1.84 pp3.7% → 1.8%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$3.83B
+$603.4M (+18.7%) vs. prior quarter
Positions
2,733
+120 vs. prior quarter
Top 10 concentration
32.9%
Top 10 as share of value
Turnover
49.0%
Q2 2026, one quarter
Average holding period
4.4 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $4.53B (Q3 2025)

Q1 2021: $1.79BQ2 2021: $2.77BQ3 2021: $2.82BQ4 2021: $3.05BQ1 2022: $3.15BQ2 2022: $3.04BQ3 2022: $2.58BQ4 2022: $2.09BQ1 2023: $2.21BQ2 2023: $2.35BQ3 2023: $2.73BQ4 2023: $3.21BQ1 2024: $3.43BQ2 2024: $3.11BQ3 2024: $2.97BQ4 2024: $3.55BQ1 2025: $2.82BQ2 2025: $3.72BQ3 2025: $4.53BQ4 2025: $3.56BQ1 2026: $3.23BQ2 2026: $3.83B
Q1 2021Q2 2026
13F filings of Simplex Trading, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 12, 20262,733$3.83BNVDAiShares Russell 2000 ETFiShares Trvs. Q1 2026SEC
Q1 2026May 14, 20262,613$3.23BNVDAAMZNSPYvs. Q4 2025SEC
Q4 2025Feb 11, 20262,449$3.56BAAPLNVDAAVGOvs. Q3 2025SEC
Q3 2025Nov 12, 20252,622$4.53BNVDAAAPLMSFTvs. Q2 2025SEC
Q2 2025Aug 5, 20252,428$3.72BNVDAAAPLAVGOvs. Q1 2025SEC
Q1 2025May 12, 20252,403$2.82BiShares TrNVDAGOOGLvs. Q4 2024SEC
Q4 2024Feb 11, 20252,442$3.55BAAPLMSTRINTCvs. Q3 2024SEC
Q3 2024Nov 8, 20242,294$2.97BNVDAPDDBABAvs. Q2 2024SEC
Q2 2024Jul 25, 20242,401$3.11BNVDAAVGOINTCvs. Q1 2024SEC
Q1 2024Apr 25, 20242,382$3.43BPFEState Street Energy Select Sector SPDR ETFBAvs. Q4 2023SEC
Q4 2023Feb 2, 20242,432$3.21BBABAGOOGLNVDAvs. Q3 2023SEC
Q3 2023Nov 1, 20232,310$2.73BiShares TrNVDAAMZNvs. Q2 2023SEC
Q2 2023Aug 4, 20232,431$2.35BiShares TrNVDAMSFTvs. Q1 2023SEC
Q1 2023Apr 27, 20232,369$2.21BiShares TrAAPLWMTvs. Q4 2022SEC
Q4 2022Feb 2, 20232,585$2.09BAMZNInvesco QQQ Trust Series INVDAvs. Q3 2022SEC
Q3 2022Nov 4, 20222,782$2.58BMSFTNVDAGOOGLvs. Q2 2022SEC
Q2 2022Aug 3, 20222,694$3.04BAAPLGOOGLVanguard S&P 500 ETFvs. Q1 2022SEC
Q1 2022May 2, 20222,880$3.15BAAPLiShares TrSPYvs. Q4 2021SEC
Q4 2021Feb 23, 2022Amended2,974$3.05BDirexion Shs ETF TrTSMSHOPvs. Q3 2021SEC
Q3 2021Oct 28, 20212,763$2.82BAMCNVDACCLvs. Q2 2021SEC
Q2 2021Aug 12, 20212,810$2.77BAMCCCLNVDAvs. Q1 2021SEC
Q1 2021Apr 26, 20212,793$1.79BDIAParamount GlobalMSTR–SEC