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 | |
|---|---|---|---|---|---|---|
|
FRMI
1876
Fermi Inc
FRMI
$2.89B
| $2.31M | ﹤0.01% |
+252,611
| New | +$1.6M |
|
1877
HP
HPQ
$28.2B
| $2.31M | ﹤0.01% |
105,367
+93,879
| +817% | +$2.08M |
|
1878
PUT
Moody's
MCO
$81.2B
| $2.31M | ﹤0.01% |
5,100
+3,900
| +325% | +$1.75M |
|
1879
PUT
BBVA Argentina
BBAR
$2.69B
| $2.31M | ﹤0.01% |
117,700
+200
| +0.2% | +$3.37K |
|
1880
CF Industries
CF
$17.4B
| $2.31M | ﹤0.01% |
+21,316
| New | +$2.51M |
|
1881
CALL
Par Pacific Holdings
PARR
$3.88B
| $2.3M | ﹤0.01% |
41,100
-7,600
| -16% | -$452K |
|
1882
DHT Holdings
DHT
$3.51B
| $2.3M | ﹤0.01% |
+139,367
| New | +$2.49M |
|
1883
CALL
CoreCivic
CXW
$3.18B
| $2.3M | ﹤0.01% |
75,800
+33,400
| +79% | +$757K |
|
1884
Sibanye-Stillwater
SBSW
$7.51B
| $2.3M | ﹤0.01% |
270,825
+34,507
| +15% | +$402K |
|
1885
CALL
Corcept Therapeutics
CORT
$12.6B
| $2.3M | ﹤0.01% |
26,400
-1,000
| -4% | -$60.4K |
|
1886
PUT
Adeia
ADEA
$2.81B
| $2.3M | ﹤0.01% |
69,700
+68,600
| +6,236% | +$2.02M |
|
1887
CALL
McCormick & Company Non-Voting
MKC
$12.9B
| $2.29M | ﹤0.01% |
45,500
+35,400
| +350% | +$1.74M |
|
1888
PUT
Mobileye
MBLY
$6.83B
| $2.29M | ﹤0.01% |
236,900
-459,300
| -66% | -$4.09M |
|
|
SEI
1889
PUT
Solaris Energy Infrastructure
SEI
$4.67B
| $2.29M | ﹤0.01% |
28,500
-84,000
| -75% | -$6M |
|
1890
PUT
Joby Aviation
JOBY
$6.3B
| $2.29M | ﹤0.01% |
257,000
+43,300
| +20% | +$418K |
|
|
MRLN
1891
CALL
Merlin Inc
MRLN
$201M
| $2.29M | ﹤0.01% |
+402,500
| New | +$3.41M |
|
1892
CALL
First Citizens BancShares
FCNCA
$23.6B
| $2.29M | ﹤0.01% |
1,100
+600
| +120% | +$1.2M |
|
1893
Ciena
CIEN
$50.6B
| $2.29M | ﹤0.01% |
+4,662
| New | +$2.38M |
|
1894
Bunge Global
BG
$20.9B
| $2.28M | ﹤0.01% |
21,381
+20,007
| +1,456% | +$2.46M |
|
1895
PUT
Zions Bancorporation
ZION
$9.32B
| $2.28M | ﹤0.01% |
32,900
+14,100
| +75% | +$889K |
|
1896
PUT
Elbit Systems
ESLT
$34.4B
| $2.28M | ﹤0.01% |
3,000
+400
| +15% | +$333K |
|
1897
CALL
Capricor Therapeutics
CAPR
$486M
| $2.28M | ﹤0.01% |
94,500
-14,500
| -13% | -$440K |
|
1898
PUT
Royal Gold
RGLD
$21.4B
| $2.28M | ﹤0.01% |
11,400
+1,400
| +14% | +$325K |
|
1899
SELLAS Life Sciences
SLS
$2.34B
| $2.27M | ﹤0.01% |
154,099
-141,063
| -48% | -$974K |
|
1900
Canadian Natural Resources
CNQ
$97.7B
| $2.27M | ﹤0.01% |
57,416
-47,255
| -45% | -$2.15M |
|
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.