Simplex Trading, LLC

In its 13F for Q1 2024 (holdings as of March 31, 2024, filed April 25, 2024), Simplex Trading, LLC reported 2,382 stock positions worth $3.4 billion. Its top holding was Pfizer (PFE) at 3.7% of the portfolio, followed by SS Energy Select Sector (XLE, 3.0%) and Boeing (BA, 1.9%). Compared with Q4 2023, it opened 902 new positions, sold out of 953, added to 728 and reduced 750. The biggest buy was SS Energy Select Sector (XLE, shares +895%) and the biggest sale Alphabet Class A (GOOGL, shares −86%).

Most Recent 13F
Q2 2026
Location
CHICAGO, IL
CIK
0001488542
Portfolio Value
$3.4B (Q1 2024)
SEC Filing
0001488542-24-000013 ↗ filed Apr 25, 2024

Holdings Value

0$1.0B$2.0B$3.0B$4.0B$5.0B Q1 2024: $3.4B $3.4B Q1 2024 Q2 2024: $3.1B Q2 2024 Q3 2024: $3.0B Q3 2024 Q4 2024: $3.5B Q4 2024 Q1 2025: $2.8B Q1 2025 Q2 2025: $3.7B Q2 2025 Q3 2025: $4.5B Q3 2025 Q4 2025: $3.6B Q4 2025 Q1 2026: $3.2B Q1 2026 Q2 2026: $3.8B Q2 2026

Holdings 2,382 stocks · $3.4B

PFE Pfizer Inc. 3.73% 4,605,985 $127.8M Add +233.7%
XLE SS Energy Select Sector 3.04% 1,105,966 $104.4M Add +894.6%
BA The Boeing Co. 1.94% 345,653 $66.7M New
INTC Intel Corp. 1.75% 1,362,068 $60.2M New
TSM Taiwan Semiconductor-SP ADR 1.68% 424,287 $57.7M Add +115.8%
KWEB Kranesh Csi China Internet 1.59% 2,073,125 $54.4M Add +10.2%
META Meta Platforms Inc. Class A 1.53% 108,215 $52.5M New
BABA Alibaba Group Holding-SP ADR 1.33% 630,426 $45.6M Reduce -64.2%
JD Jd.com Inc.-ADR 1.32% 1,656,014 $45.4M Reduce -20.2%
PYPL PayPal Holdings Inc. 1.29% 663,227 $44.4M Add +32.0%
AMD Advanced Micro Devices 1.28% 243,264 $43.9M New
SOXL Direx Dail Semi Bu 3X Et-Usd 1.20% 884,677 $41.2M New
BIDU Baidu Inc. - Spon ADR 1.20% 390,036 $41.1M Add +207.8%
GOOG Alphabet Inc. Class C 1.10% 248,304 $37.8M New
GE General Electric 1.08% 210,176 $36.9M New
SBUX Starbucks Corp. 1.03% 388,024 $35.5M Add +323.1%
AVGO Broadcom Inc. 1.02% 26,417 $35.0M Add +21.6%
MU Micron Technology Inc. 1.00% 292,496 $34.5M Reduce -22.4%
SLV iShares Silver Trust 0.97% 1,469,127 $33.4M New
MARA Mara Holdings Inc. filed as MARATHON DIGITAL HOLDINGS IN 0.96% 1,460,702 $33.0M New
CRWD CrowdStrike Holdings Inc. Class A 0.93% 99,293 $31.8M New
CSCO Cisco Systems Inc. 0.92% 634,238 $31.7M Add +856.0%
NEM Newmont Corp. 0.89% 853,808 $30.6M Add +54.7%
BITO Proshares Bitcoin ETF-Usd 0.85% 906,491 $29.3M Add +51.9%
LLY Eli Lilly & Co. 0.82% 36,141 $28.1M New
B Barrick Gold Corp. 0.81% 1,673,456 $27.8M Reduce -9.0%
NKE Nike Inc. Class B 0.81% 296,021 $27.8M Reduce -7.5%
BMY Bristol-Myers Squibb Co. 0.80% 503,748 $27.3M New
VLO Valero Energy Corp. 0.79% 159,424 $27.2M Add +130.6%
NVO Novo-Nordisk A/S-Spons ADR 0.71% 189,656 $24.4M Add +159.3%
BKNG Booking Holdings Inc. 0.69% 6,532 $23.7M Add +1114.1%
NVDA Nvidia Corp. 0.65% 24,805 $22.4M Reduce -86.7%
MMM 3M Co. 0.59% 190,524 $20.2M Add +792.3%
ALB Albemarle Corp. 0.58% 150,150 $19.8M Add +159.2%
SPY SS SPDR S&P 500 ETF Trust-US 0.56% 36,861 $19.3M New
DIS The Walt Disney Co. filed as DISNEY WALT CO 0.56% 157,252 $19.2M Reduce -80.7%
BRK.B Berkshire Hathaway Inc. Class B 0.53% 43,561 $18.3M Add +237.3%
GDX Vaneck Gold Miners ETF 0.53% 576,254 $18.2M Reduce -8.6%
XBI SS SPDR S&P Biotech ETF 0.52% 188,115 $17.9M New
GOOGL Alphabet Inc. Class A 0.50% 114,255 $17.2M Reduce -86.4%
SNOW Snowflake Inc. 0.50% 105,930 $17.1M New
CCL Carnival Corp. 0.49% 1,025,542 $16.8M New
UNH Unitedhealth Group Inc. 0.49% 33,725 $16.7M New
IEF iShares 7-10 Year Treasury B 0.46% 167,310 $15.8M Add +43.5%
FSLR First Solar Inc. 0.45% 91,201 $15.4M Reduce -35.2%
SOFI Sofi Technologies Inc. 0.45% 2,106,379 $15.4M New
AMT American Tower Corp. 0.45% 77,628 $15.3M Add +39.8%
DECK Deckers Outdoor Corp. 0.44% 16,182 $15.2M New
DELL Dell Technologies -C 0.43% 129,137 $14.7M New
FAS Dirx DLY Finacial B3X ETF-Ui 0.42% 128,864 $14.5M Add +322.4%
SE Sea Ltd.-ADR 0.42% 265,457 $14.3M Reduce -40.7%
AI C3.AI Inc. Class A 0.39% 497,130 $13.5M Add +846.3%
WBA Walgreens Boots Alliance Inc. 0.39% 618,631 $13.4M Add +230.2%
NOW ServiceNow Inc. 0.38% 16,975 $12.9M New
F Ford Motor Co. filed as FORD MTR CO DEL 0.37% 964,622 $12.8M Reduce -18.4%
HOOD Robinhood Markets Inc. Class A 0.37% 635,458 $12.8M Reduce -64.2%
CART Maplebear Inc. 0.37% 341,197 $12.7M Add +647.9%
MRVL Marvell Technology Inc. 0.37% 179,491 $12.7M Add +291.9%
CYTK Cytokinetics Inc. 0.36% 178,309 $12.5M New
CVX Chevron Corp. 0.36% 79,204 $12.5M Reduce -60.4%
VALE Vale SA-SP ADR 0.35% 997,615 $12.2M Add +77.1%
ADBE Adobe Inc. 0.35% 23,854 $12.0M New
HLT Hilton Worldwide Holdings Inc. 0.35% 55,856 $11.9M Add +71.2%
CVS CVS Health Corp. 0.34% 147,237 $11.7M Reduce -15.5%
QQQ Invesco QQQ Trust Series 1 0.34% 26,321 $11.7M Add +1824.0%
KRE SS SPDR S&P Regional Bank 0.34% 231,474 $11.6M New
DDOG Datadog Inc. Class A 0.34% 93,023 $11.5M New
UAL United Airlines Holdings Inc. 0.33% 238,467 $11.4M Reduce -6.2%
BAX Baxter International Inc. 0.33% 262,309 $11.2M New
SEDG Solaredge Technologies Inc. 0.32% 156,360 $11.1M Add +1.9%
FCX Freeport-McMoran Inc. 0.32% 235,407 $11.1M Add +234.4%
WBD Warner Bros Discovery Inc. 0.31% 1,223,847 $10.7M Add +5.8%
CI The Cigna Group 0.31% 29,413 $10.7M Add +182.3%
OXY Occidental Petroleum Corp. 0.30% 157,148 $10.2M Reduce -52.0%
DASH DoorDash Inc. Class A 0.29% 73,452 $10.1M New
GIS General Mills Inc. 0.29% 143,209 $10.0M Reduce -0.5%
HUM Humana Inc. 0.29% 28,362 $9.8M Reduce -53.5%
IWD iShares Russell 1000 Value E 0.28% 54,315 $9.7M Add +70.6%
TEVA Teva Pharmaceutical-SP ADR 0.27% 657,687 $9.3M Add +1.6%
UPS United Parcel Service Class B 0.27% 62,262 $9.3M Add +16.8%
FTNT Fortinet Inc. 0.27% 133,256 $9.1M New
LVS Las Vegas Sands Corp. 0.26% 175,765 $9.1M Add +181.5%
PARAA Paramount Global Class B 0.26% 756,016 $8.9M Reduce -3.3%
PROSHARES TR 0.25% 833,229 $8.7M Add +132.0%
SRPT Sarepta Therapeutics Inc. 0.25% 66,780 $8.6M Add +107.3%
ET Energy Transfer LP 0.25% 546,419 $8.6M Reduce -40.9%
CSIQ Canadian Solar Inc. 0.25% 432,875 $8.6M Add +7.8%
TSN Tyson Foods Inc. Class A 0.25% 144,052 $8.5M Reduce -13.1%
RIOT Riot Platforms Inc. 0.24% 686,822 $8.4M Reduce -16.6%
CROX Crocs Inc. 0.24% 58,376 $8.4M Reduce -11.6%
COHR Coherent Corp. 0.24% 137,965 $8.4M Add +156.4%
MSFT Microsoft Corp. 0.24% 19,868 $8.4M New
EXAS Exact Sciences Corp. 0.24% 117,868 $8.1M Add +646.5%
PINS Pinterest Inc. Class A 0.23% 230,005 $8.0M New
AZN Astrazeneca PLC-Spons ADR 0.23% 116,803 $7.9M New
CC The Chemours Co. 0.22% 285,197 $7.5M Add +52910.6%
GILD Gilead Sciences Inc. 0.22% 101,243 $7.4M New
ITOT iShares Core S&P Total U.S. 0.21% 63,940 $7.4M Add +120.6%
AA Alcoa Corp. 0.21% 214,421 $7.2M Reduce -38.3%
RIG Transocean Ltd. 0.21% 1,138,322 $7.1M Add +605.2%

Show all 2,382 holdings

Options reported separately and not counted above: STATE STR SPDR S&P 500 ETF T puts ($30.6B), STATE STR SPDR S&P 500 ETF T calls ($10.1B), INVESCO QQQ TR puts ($7.8B), NVIDIA CORPORATION calls ($6.8B), NVIDIA CORPORATION puts ($5.8B), ISHARES TR puts ($5.4B), ISHARES TR calls ($4.5B), INVESCO QQQ TR calls ($4.2B), TESLA INC puts ($3.4B), APPLE INC calls ($2.6B), TESLA INC calls ($2.4B), META PLATFORMS INC calls ($1.7B), and 6757 more.

Portfolio Sells Q4 2023 → Q1 2024

GOOGL Alphabet Inc. Class A Reduce -86.4% 0.50% −3.15
BABA Alibaba Group Holding-SP ADR Reduce -64.2% 1.33% −2.92
NVDA Nvidia Corp. Reduce -86.7% 0.65% −2.22
DIS The Walt Disney Co. Reduce -80.7% 0.56% −1.72
C Citigroup Inc. Sold out 0.00% −1.72
XLU St Sr Utl SL SE SPDR ETF-Usd Sold out 0.00% −1.57
FXI iShares China Large-Cap ETF Sold out 0.00% −1.19
PG The Procter & Gamble Co. Sold out 0.00% −1.15
CRM Salesforce Inc. Reduce -90.1% 0.13% −1.13
TSLA Tesla Inc. Sold out 0.00% −0.99
ARKK ARK Innovation ETF Reduce -97.1% 0.02% −0.89
IWM iShares Russell 2000 ETF Sold out 0.00% −0.83
WMT Walmart Inc. Reduce -86.1% 0.13% −0.76
DAL Delta Air Lines Inc. Sold out 0.00% −0.67
XLK SS Technology Select Sector Sold out 0.00% −0.66
GLD SPDR Gold Shares Sold out 0.00% −0.63
COIN Coinbase Global Inc. Class A Sold out 0.00% −0.61
HUM Humana Inc. Reduce -53.5% 0.29% −0.58
CVX Chevron Corp. Reduce -60.4% 0.36% −0.56
JD Jd.com Inc.-ADR Reduce -20.2% 1.32% −0.54
WFC Wells Fargo & Co. Sold out 0.00% −0.54
FDX FedEx Corp. Sold out 0.00% −0.52
ORCL Oracle Corp. Sold out 0.00% −0.50
MDB Mongodb Inc. Reduce -89.3% 0.05% −0.47
EEM iShares MSCI Emerging Market Sold out 0.00% −0.43
XLP SS Consumer Staples Sel Sect Sold out 0.00% −0.39
CHKP Check Point Software Tech Reduce -97.0% 0.01% −0.39
T AT&T Inc. Reduce -91.5% 0.03% −0.37
XOM Exxon Mobil Corp. Sold out 0.00% −0.35
RTX RTX Corp. Sold out 0.00% −0.34
ISRG Intuitive Surgical Inc. Reduce -95.1% 0.02% −0.33
HOOD Robinhood Markets Inc. Class A Reduce -64.2% 0.37% −0.33
MPC Marathon Petroleum Corp. Sold out 0.00% −0.33
STZ Constellation Brands Inc. Class A Sold out 0.00% −0.32
OXY Occidental Petroleum Corp. Reduce -52.0% 0.30% −0.31
FSLR First Solar Inc. Reduce -35.2% 0.45% −0.31
PEP Pepsico Inc. Reduce -71.2% 0.12% −0.31
APO Apollo Global Management Inc. Sold out 0.00% −0.30
Z Zillow Group Inc. Class C Sold out 0.00% −0.29
TXN Texas Instruments Inc. Sold out 0.00% −0.27
SPOT Spotify Technology SA Reduce -89.7% 0.04% −0.27
NKE Nike Inc. Class B Reduce -7.5% 0.81% −0.27
VBK Van Morst SML-Cap Gro-Usd Inc. Reduce -98.2% 0.00% −0.25
BP BP PLC-Spons ADR Sold out 0.00% −0.25
TBT Proshares Ultrashort 20+Y TR Reduce -89.9% 0.03% −0.24
BHP BHP Group Ltd.-Spon ADR Reduce -94.9% 0.01% −0.23
B Barrick Gold Corp. Reduce -9.0% 0.81% −0.22
PGR Progressive Corp. Sold out 0.00% −0.22
APD Air Products & Chemicals Inc. Reduce -75.3% 0.06% −0.22
AAPL Apple Inc. Reduce -57.6% 0.11% −0.21

Portfolio Buys Q4 2023 → Q1 2024

XLE SS Energy Select Sector Add +894.6% 3.04% +2.75
PFE Pfizer Inc. Add +233.7% 3.73% +2.49
BA The Boeing Co. New 1.94% +1.94
INTC Intel Corp. New 1.75% +1.75
META Meta Platforms Inc. Class A New 1.53% +1.53
AMD Advanced Micro Devices New 1.28% +1.28
SOXL Direx Dail Semi Bu 3X Et-Usd New 1.20% +1.20
GOOG Alphabet Inc. Class C New 1.10% +1.10
GE General Electric New 1.08% +1.08
TSM Taiwan Semiconductor-SP ADR Add +115.8% 1.68% +1.05
SLV iShares Silver Trust New 0.97% +0.97
MARA Mara Holdings Inc. New 0.96% +0.96
CRWD CrowdStrike Holdings Inc. Class A New 0.93% +0.93
LLY Eli Lilly & Co. New 0.82% +0.82
CSCO Cisco Systems Inc. Add +856.0% 0.92% +0.82
BMY Bristol-Myers Squibb Co. New 0.80% +0.80
SBUX Starbucks Corp. Add +323.1% 1.03% +0.76
BIDU Baidu Inc. - Spon ADR Add +207.8% 1.20% +0.73
BKNG Booking Holdings Inc. Add +1114.1% 0.69% +0.63
SPY SS SPDR S&P 500 ETF Trust-US New 0.56% +0.56
XBI SS SPDR S&P Biotech ETF New 0.52% +0.52
MMM 3M Co. Add +792.3% 0.59% +0.52
VLO Valero Energy Corp. Add +130.6% 0.79% +0.51
SNOW Snowflake Inc. New 0.50% +0.50
CCL Carnival Corp. New 0.49% +0.49
UNH Unitedhealth Group Inc. New 0.49% +0.49
NVO Novo-Nordisk A/S-Spons ADR Add +159.3% 0.71% +0.47
BITO Proshares Bitcoin ETF-Usd Add +51.9% 0.85% +0.47
SOFI Sofi Technologies Inc. New 0.45% +0.45
DECK Deckers Outdoor Corp. New 0.44% +0.44
DELL Dell Technologies -C New 0.43% +0.43
BRK.B Berkshire Hathaway Inc. Class B Add +237.3% 0.53% +0.39
NOW ServiceNow Inc. New 0.38% +0.38
CYTK Cytokinetics Inc. New 0.36% +0.36
ADBE Adobe Inc. New 0.35% +0.35
AI C3.AI Inc. Class A Add +846.3% 0.39% +0.35
FAS Dirx DLY Finacial B3X ETF-Ui Add +322.4% 0.42% +0.34
KRE SS SPDR S&P Regional Bank New 0.34% +0.34
CART Maplebear Inc. Add +647.9% 0.37% +0.34
DDOG Datadog Inc. Class A New 0.34% +0.34
PYPL PayPal Holdings Inc. Add +32.0% 1.29% +0.33
BAX Baxter International Inc. New 0.33% +0.33
QQQ Invesco QQQ Trust Series 1 Add +1824.0% 0.34% +0.32
ALB Albemarle Corp. Add +159.2% 0.58% +0.32
DASH DoorDash Inc. Class A New 0.29% +0.29
MRVL Marvell Technology Inc. Add +291.9% 0.37% +0.28
AVGO Broadcom Inc. Add +21.6% 1.02% +0.27
FTNT Fortinet Inc. New 0.27% +0.27
MSFT Microsoft Corp. New 0.24% +0.24
WBA Walgreens Boots Alliance Inc. Add +230.2% 0.39% +0.24

Options Activity Q4 2023 → Q1 2024

STATE STR SPDR S&P 500 ETF T put Add +16.3% 59,050,900 $30.6B
STATE STR SPDR S&P 500 ETF T call Add +9.8% 19,820,600 $10.1B
INVESCO QQQ TR put Add +8.4% 17,607,100 $7.8B
NVIDIA CORPORATION call Reduce -1.2% 7,506,200 $6.8B
NVIDIA CORPORATION put Add +35.3% 6,481,800 $5.8B
ISHARES TR put Reduce -20.0% 35,871,600 $5.4B
ISHARES TR call Reduce -9.7% 33,053,000 $4.5B
INVESCO QQQ TR call Add +13.0% 9,559,000 $4.2B
TESLA INC put Add +37.9% 19,111,900 $3.4B
APPLE INC call Add +27.7% 16,223,700 $2.6B
TESLA INC call Add +20.7% 13,586,000 $2.4B
META PLATFORMS INC call Reduce -22.3% 3,605,900 $1.7B
SELECT SECTOR SPDR TR put Add +0.2% 21,796,600 $1.6B
AMAZON COM INC call Reduce -29.8% 8,523,000 $1.5B
APPLE INC put Reduce -15.7% 8,328,100 $1.4B
ALPHABET INC call Reduce -11.8% 8,930,800 $1.4B
META PLATFORMS INC put Reduce -4.6% 2,876,000 $1.3B
MICROSOFT CORP call Reduce -22.4% 3,116,000 $1.3B
MICROSOFT CORP put Reduce -25.9% 3,042,200 $1.3B
SPDR GOLD TR call Reduce -36.1% 5,577,000 $1.1B
SELECT SECTOR SPDR TR call Add +10.2% 14,230,700 $1.1B
ALPHABET INC put Add +0.3% 6,929,600 $1.0B
AMAZON COM INC put Reduce -36.8% 5,167,100 $923.1M
SPDR GOLD TR put Add +3.9% 4,361,300 $897.2M
BOOKING HOLDINGS INC put Reduce -23.3% 231,400 $839.5M
ADVANCED MICRO DEVICES INC put Add +5.2% 4,453,700 $803.8M
BROADCOM INC call Add +53.8% 594,200 $787.6M
SPDR SERIES TRUST put Add +6.3% 11,537,700 $735.6M
STRATEGY INC call Add +92.7% 425,300 $724.9M
ADVANCED MICRO DEVICES INC call Reduce -2.8% 3,908,700 $705.5M
SUPER MICRO COMPUTER INC put Add +82.0% 671,500 $678.2M
ALIBABA GROUP HLDG LTD call Add +2.1% 8,975,700 $649.5M
VANECK ETF TRUST call Add +32.8% 9,174,500 $641.8M
VANECK ETF TRUST put Add +30.0% 5,198,700 $639.0M
BROADCOM INC put Reduce -32.5% 464,200 $615.3M
NETFLIX INC. put Reduce -36.7% 982,400 $596.6M
TAIWAN SEMICONDUCTOR MANUFAC call Add +65.4% 4,081,500 $555.3M
STRATEGY INC put Add +0.5% 321,100 $547.3M
COSTCO WHOLESALE CORPORATION put Add +11.6% 742,300 $543.8M
MICRON TECHNOLOGY INC call Add +95.9% 4,183,600 $493.2M
SPDR SERIES TRUST call Reduce -30.0% 6,975,500 $473.9M
ISHARES TR put Add +2.2% 5,661,800 $466.3M
COSTCO WHOLESALE CORPORATION call Add +32.4% 621,700 $455.5M
NETFLIX INC. call Reduce -45.2% 742,900 $451.2M
SUPER MICRO COMPUTER INC call Add +28.9% 430,800 $435.1M
BOEING CO call Add +29.1% 2,166,900 $418.2M
ELI LILLY & CO call Add +6.5% 490,000 $381.2M
STATE STR SPDR DOW JONES IND put Reduce -35.0% 957,100 $380.7M
COINBASE GLOBAL INC put Reduce -45.1% 1,435,700 $380.6M
MICRON TECHNOLOGY INC put Reduce -0.7% 3,222,000 $379.8M

Showing the first 50 of 7,207.

Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 2,733$3.8BNVDA, IWM, TLT, GOOGL, SOXX
Q1 2026 2,613$3.2BNVDA, AMZN, SPY, META, TSM
Q4 2025 2,449$3.6BAAPL, NVDA, AVGO, NFLX, SPY
Q3 2025 2,622$4.5BNVDA, AAPL, MSFT, IWM, UNH
Q2 2025 2,428$3.7BNVDA, AAPL, AVGO, TLT, GOOGL
Q1 2025 2,403$2.8BTLT, NVDA, GOOGL, TSM, INTC
Q4 2024 2,442$3.5BAAPL, MSTR, INTC, NVDA, BABA
Q3 2024 2,294$3.0BNVDA, PDD, BABA, BA, KWEB
Q2 2024 2,401$3.1BNVDA, AVGO, INTC, C, PFE
Q1 2024 2,382$3.4BPFE, XLE, BA, INTC, TSM