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 | |
|---|---|---|---|---|---|---|
2026
PUT
Lightwave Logic
LWLG
$819M
| $2.05M | ﹤0.01% |
216,800
+128,600
| +146% | +$1.51M |
|
2027
CALL
International Paper
IP
$18.5B
| $2.05M | ﹤0.01% |
53,700
+28,500
| +113% | +$976K |
|
2028
CALL
Herbalife
HLF
$1.32B
| $2.04M | ﹤0.01% |
154,900
-13,800
| -8% | -$190K |
|
2029
CALL
KE Holdings
BEKE
$18B
| $2.03M | ﹤0.01% |
139,800
-77,300
| -36% | -$1.27M |
|
2030
PUT
VanEck Energy Income ETF
EINC
$81.6M
| $2.03M | ﹤0.01% |
29,600
+26,300
| +797% | +$3.11M |
|
2031
PUT
Edison International
EIX
$20.3B
| $2.03M | ﹤0.01% |
27,200
-16,200
| -37% | -$1.16M |
|
2032
PUT
Cal-Maine
CALM
$3.15B
| $2.02M | ﹤0.01% |
25,100
+8,800
| +54% | +$679K |
|
|
PRMB
2033
CALL
Primo Brands
PRMB
$7.06B
| $2.02M | ﹤0.01% |
82,700
-300
| -0.4% | -$6.66K |
|
2034
Public Storage
PSA
$53.8B
| $2.01M | ﹤0.01% |
6,326
+3,513
| +125% | +$1.07M |
|
2035
CALL
Virgin Galactic
SPCE
$484M
| $2.01M | ﹤0.01% |
696,200
+312,800
| +82% | +$1.02M |
|
2036
CALL
Enovix
ENVX
$630M
| $2.01M | ﹤0.01% |
331,300
-31,900
| -9% | -$211K |
|
2037
CVS Health
CVS
$114B
| $2.01M | ﹤0.01% |
19,407
-54,751
| -74% | -$4.89M |
|
2038
Caesars Entertainment
CZR
$6.03B
| $2.01M | ﹤0.01% |
66,491
-19,168
| -22% | -$540K |
|
2039
CALL
Tidewater
TDW
$4.22B
| $2.01M | ﹤0.01% |
30,100
-9,500
| -24% | -$754K |
|
2040
CALL
FT Vest Gold Strategy Target Income ETF
IGLD
$601M
| $2M | ﹤0.01% |
64,100
+61,500
| +2,365% | +$1.47M |
|
|
GRRR
2041
CALL
Gorilla Technology Group
GRRR
$385M
| $2M | ﹤0.01% |
100,500
+84,700
| +536% | +$1.27M |
|
2042
CALL
Tenaris
TS
$28B
| $2M | ﹤0.01% |
36,000
+16,000
| +80% | +$971K |
|
2043
Vicor
VICR
$13B
| $2M | ﹤0.01% |
5,258
-6,440
| -55% | -$1.76M |
|
|
ELE
2044
CALL
Elemental Royalty Corp
ELE
$1.59B
| $2M | ﹤0.01% |
+114,300
| New | +$2.01M |
|
2045
Methode Electronics
MEI
$517M
| $2M | ﹤0.01% |
105,193
+101,184
| +2,524% | +$1.05M |
|
2046
CALL
Teck Resources
TECK
$32.4B
| $1.99M | ﹤0.01% |
33,500
-15,800
| -32% | -$963K |
|
2047
Best Buy
BBY
$19B
| $1.99M | ﹤0.01% |
+26,244
| New | +$1.74M |
|
2048
CALL
Stellantis
STLA
$13.3B
| $1.99M | ﹤0.01% |
346,300
-80,100
| -19% | -$593K |
|
2049
10x Genomics
TXG
$11.2B
| $1.99M | ﹤0.01% |
+51,807
| New | +$1.36M |
|
2050
CALL
Darling Ingredients
DAR
$9.67B
| $1.98M | ﹤0.01% |
36,300
-141,600
| -80% | -$8.45M |
|
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.