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 | |
|---|---|---|---|---|---|---|
1801
CALL
FuboTV Inc
FUBO
$291M
| $2.5M | ﹤0.01% |
271,300
-79,300
| -23% | -$845K |
|
1802
PUT
MPLX
MPLX
$57.6B
| $2.49M | ﹤0.01% |
44,200
+26,000
| +143% | +$1.45M |
|
1803
PUT
Lincoln National
LNC
$7.98B
| $2.49M | ﹤0.01% |
70,300
-23,400
| -25% | -$841K |
|
|
MRSH
1804
CALL
Marsh
MRSH
$81.7B
| $2.48M | ﹤0.01% |
14,900
+7,900
| +113% | +$1.32M |
|
|
CRMU
1805
CALL
Leverage Shares 2x Long CRML Daily ETF
CRMU
$1.82M
| $2.48M | ﹤0.01% |
258,700
+258,200
| +51,640% | +$2.01M |
|
1806
CALL
Kosmos Energy
KOS
$1.58B
| $2.48M | ﹤0.01% |
1,173,100
+86,700
| +8% | +$241K |
|
|
BAND
1807
PUT
Bandwidth Inc
BAND
$1.99B
| $2.48M | ﹤0.01% |
+39,100
| New | +$1.75M |
|
1808
PUT
Molina Healthcare
MOH
$9.96B
| $2.47M | ﹤0.01% |
10,800
-15,400
| -59% | -$2.79M |
|
1809
Chubb
CB
$129B
| $2.47M | ﹤0.01% |
+7,247
| New | +$2.36M |
|
1810
CALL
Casey's General Stores
CASY
$22.1B
| $2.46M | ﹤0.01% |
3,100
+2,500
| +417% | +$2.01M |
|
1811
Aurora
AUR
$12.1B
| $2.46M | ﹤0.01% |
361,164
+46,532
| +15% | +$285K |
|
1812
Symbotic
SYM
$5.65B
| $2.46M | ﹤0.01% |
54,733
+9,801
| +22% | +$499K |
|
1813
CALL
Polestar Automotive Holding UK
PSNY
$1.14B
| $2.46M | ﹤0.01% |
130,800
+200
| +0.2% | +$4K |
|
1814
CALL
Packaging Corp of America
PKG
$21.1B
| $2.45M | ﹤0.01% |
10,300
-500
| -5% | -$110K |
|
1815
PUT
Ascendis Pharma A/S
ASND
$14.8B
| $2.45M | ﹤0.01% |
9,200
+7,100
| +338% | +$1.66M |
|
1816
CALL
CBRE Group
CBRE
$39B
| $2.45M | ﹤0.01% |
18,200
+8,800
| +94% | +$1.21M |
|
1817
CALL
Autoliv
ALV
$8.61B
| $2.45M | ﹤0.01% |
21,100
+18,800
| +817% | +$2.23M |
|
1818
PUT
Erasca
ERAS
$4.98B
| $2.45M | ﹤0.01% |
133,700
+117,600
| +730% | +$1.68M |
|
1819
CALL
Itron
ITRI
$3.93B
| $2.45M | ﹤0.01% |
28,300
-1,500
| -5% | -$128K |
|
1820
CALL
Ross Stores
ROST
$75.4B
| $2.45M | ﹤0.01% |
11,500
-15,600
| -58% | -$3.51M |
|
1821
PUT
Enovix
ENVX
$630M
| $2.45M | ﹤0.01% |
403,000
-3,900
| -1% | -$25.9K |
|
1822
PUT
Archer Daniels Midland
ADM
$39.1B
| $2.44M | ﹤0.01% |
32,000
+900
| +3% | +$68.5K |
|
1823
CALL
Procure Space ETF
UFO
$556M
| $2.44M | ﹤0.01% |
48,200
+45,600
| +1,754% | +$2.45M |
|
1824
PUT
DHT Holdings
DHT
$3.51B
| $2.43M | ﹤0.01% |
147,300
+90,000
| +157% | +$1.61M |
|
1825
ProShares UltraPro Short S&P 500
SPXU
$414M
| $2.43M | ﹤0.01% |
65,669
+20,595
| +46% | +$852K |
|
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.