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 | |
|---|---|---|---|---|---|---|
|
WRD
1976
CALL
WeRide Inc
WRD
$1.82B
| $2.12M | ﹤0.01% |
365,000
-115,900
| -24% | -$837K |
|
1977
PUT
Performance Food Group
PFGC
$14.4B
| $2.12M | ﹤0.01% |
19,000
-6,800
| -26% | -$647K |
|
1978
Dick's Sporting Goods
DKS
$13.4B
| $2.12M | ﹤0.01% |
9,362
+7,356
| +367% | +$1.63M |
|
|
ZVOL
1979
PUT
Volatility Premium Plus ETF
ZVOL
$17.4M
| $2.12M | ﹤0.01% |
216,000
-108,200
| -33% | -$911K |
|
1980
PUT
Blue Owl Capital
OBDC
$5.33B
| $2.12M | ﹤0.01% |
195,200
-13,700
| -7% | -$153K |
|
|
CEPT
1981
CALL
DELISTED
Cantor Equity Partners II
CEPT
| $2.12M | ﹤0.01% |
+158,100
| New | +$1.87M |
|
1982
nVent Electric
NVT
$26.6B
| $2.12M | ﹤0.01% |
12,498
+11,901
| +1,993% | +$1.86M |
|
1983
Cameco
CCJ
$38.4B
| $2.12M | ﹤0.01% |
20,807
-35,044
| -63% | -$3.93M |
|
1984
Varonis Systems
VRNS
$5.31B
| $2.12M | ﹤0.01% |
50,502
+24,729
| +96% | +$725K |
|
1985
CALL
DTE Energy
DTE
$25.3B
| $2.12M | ﹤0.01% |
13,900
+5,900
| +74% | +$862K |
|
1986
PUT
Tetra Tech
TTEK
$8.68B
| $2.12M | ﹤0.01% |
73,300
-6,700
| -8% | -$197K |
|
|
AEXA
1987
CALL
American Exceptionalism Acquisition Corp
AEXA
$552M
| $2.12M | ﹤0.01% |
179,100
-61,900
| -26% | -$698K |
|
1988
CALL
CRISPR Therapeutics
CRSP
$5.24B
| $2.12M | ﹤0.01% |
38,800
-24,600
| -39% | -$1.3M |
|
1989
CALL
ITT
ITT
$18.4B
| $2.12M | ﹤0.01% |
10,700
+10,500
| +5,250% | +$2.12M |
|
|
NUAI
1990
CALL
New Era Energy & Digital Inc
NUAI
$853M
| $2.12M | ﹤0.01% |
331,600
+29,600
| +10% | +$144K |
|
1991
CALL
Guardant Health
GH
$23.8B
| $2.12M | ﹤0.01% |
14,100
-200
| -1% | -$21.8K |
|
1992
Norwegian Cruise Line
NCLH
$6.71B
| $2.11M | ﹤0.01% |
100,093
-160,357
| -62% | -$2.99M |
|
1993
PUT
JB Hunt Transport Services
JBHT
$21.2B
| $2.11M | ﹤0.01% |
7,300
+6,100
| +508% | +$1.57M |
|
1994
CALL
Infosys
INFY
$42.5B
| $2.11M | ﹤0.01% |
200,700
+44,500
| +28% | +$557K |
|
1995
PUT
SEI Investments
SEIC
$12.7B
| $2.11M | ﹤0.01% |
24,000
+21,600
| +900% | +$1.88M |
|
1996
AB InBev
BUD
$154B
| $2.1M | ﹤0.01% |
25,495
-7,800
| -23% | -$613K |
|
1997
CALL
BrightSpring Health Services
BTSG
$11.2B
| $2.1M | ﹤0.01% |
30,100
+23,500
| +356% | +$1.3M |
|
1998
PUT
Sterling Infrastructure
STRL
$15.7B
| $2.1M | ﹤0.01% |
2,500
-300
| -11% | -$211K |
|
|
KLAR
1999
PUT
Klarna Group
KLAR
$4.85B
| $2.1M | ﹤0.01% |
103,600
-59,800
| -37% | -$942K |
|
2000
PUT
Corcept Therapeutics
CORT
$12.6B
| $2.1M | ﹤0.01% |
24,100
-71,800
| -75% | -$4.34M |
|
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.