Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1026
Robinhood
HOOD
$107B
| $6.46M | ﹤0.01% |
+64,451
| New | +$5.4M |
|
|
FITB
1027
CALL
Fifth Third Bancorp
FITB
$47.2B
| $6.46M | ﹤0.01% |
114,600
-25,500
| -18% | -$1.29M |
|
1028
CALL
Bunge Global
BG
$20.9B
| $6.44M | ﹤0.01% |
60,300
-39,300
| -39% | -$4.83M |
|
1029
CALL
Amprius Technologies
AMPX
$1.42B
| $6.43M | ﹤0.01% |
463,800
-1,000
| -0.2% | -$17.9K |
|
1030
CALL
Air Products & Chemicals
APD
$62.7B
| $6.42M | ﹤0.01% |
21,900
+8,300
| +61% | +$2.41M |
|
1031
CALL
Las Vegas Sands
LVS
$25.3B
| $6.39M | ﹤0.01% |
138,300
-57,200
| -29% | -$2.97M |
|
1032
PUT
Abercrombie & Fitch
ANF
$5.76B
| $6.37M | ﹤0.01% |
70,800
+16,100
| +29% | +$1.37M |
|
1033
CALL
Powell Industries
POWL
$6.91B
| $6.36M | ﹤0.01% |
22,200
-13,800
| -38% | -$3.74M |
|
1034
CALL
Exelon
EXC
$41.6B
| $6.35M | ﹤0.01% |
136,300
+28,400
| +26% | +$1.31M |
|
1035
CALL
West Pharmaceutical
WST
$26.1B
| $6.35M | ﹤0.01% |
17,700
+800
| +5% | +$245K |
|
1036
PUT
Clorox
CLX
$10.1B
| $6.35M | ﹤0.01% |
66,500
+30,700
| +86% | +$2.95M |
|
1037
CALL
Lemonade
LMND
$3.48B
| $6.34M | ﹤0.01% |
97,500
-14,600
| -13% | -$854K |
|
1038
CALL
Autodesk
ADSK
$43.8B
| $6.34M | ﹤0.01% |
32,600
+6,300
| +24% | +$1.44M |
|
1039
PUT
Carrier Global
CARR
$46.5B
| $6.34M | ﹤0.01% |
86,400
-24,800
| -22% | -$1.62M |
|
1040
PUT
PVH
PVH
$3.51B
| $6.33M | ﹤0.01% |
85,300
-10,200
| -11% | -$873K |
|
1041
CALL
Shift4
FOUR
$3.04B
| $6.31M | ﹤0.01% |
129,800
-30,300
| -19% | -$1.31M |
|
|
FLG
1042
PUT
Flagstar Bank National Association
FLG
$5.13B
| $6.31M | ﹤0.01% |
422,300
-77,100
| -15% | -$1.09M |
|
1043
Fidelity Wise Origin Bitcoin Fund
FBTC
$15.6B
| $6.3M | ﹤0.01% |
123,438
+52,749
| +75% | +$3.3M |
|
1044
CALL
KB Home
KBH
$2.92B
| $6.3M | ﹤0.01% |
100,600
-12,800
| -11% | -$666K |
|
|
PSKY
1045
PUT
Paramount Skydance Corp
PSKY
$11.2B
| $6.3M | ﹤0.01% |
638,500
+343,900
| +117% | +$3.62M |
|
1046
CALL
Agilent Technologies
A
$48.7B
| $6.28M | ﹤0.01% |
47,300
-2,700
| -5% | -$329K |
|
1047
CALL
Duolingo
DUOL
$6.71B
| $6.28M | ﹤0.01% |
54,600
-115,300
| -68% | -$12.6M |
|
1048
CALL
CF Industries
CF
$17.4B
| $6.28M | ﹤0.01% |
58,000
-68,400
| -54% | -$8.06M |
|
|
AXON
1049
CALL
Axon Enterprise
AXON
$34.9B
| $6.28M | ﹤0.01% |
11,200
-500
| -4% | -$209K |
|
1050
Zoetis
ZTS
$29.4B
| $6.28M | ﹤0.01% |
87,334
+12,637
| +17% | +$1.19M |
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.