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 | |
|---|---|---|---|---|---|---|
1001
CALL
YPF Sociedad Anonima ADS
YPF
$20.4B
| $6.75M | ﹤0.01% |
148,500
-173,400
| -54% | -$8.13M |
|
1002
CALL
Rollins
ROL
$14.4B
| $6.72M | ﹤0.01% |
161,100
+159,700
| +11,407% | +$8.16M |
|
1003
CALL
Joby Aviation
JOBY
$6.3B
| $6.72M | ﹤0.01% |
753,700
-330,400
| -30% | -$3.19M |
|
|
PPL
1004
CALL
PPL Corp
PPL
$24.1B
| $6.72M | ﹤0.01% |
184,900
+46,400
| +34% | +$1.71M |
|
1005
Direxion Daily MSCI South Korea Bull 3X ETF
KORU
$1.33B
| $6.71M | ﹤0.01% |
171,700
+107,100
| +166% | +$3.87M |
|
|
JBS
1006
CALL
JBS N.V.
JBS
$38.1B
| $6.71M | ﹤0.01% |
565,900
+13,900
| +3% | +$203K |
|
1007
PUT
Caesars Entertainment
CZR
$6.03B
| $6.69M | ﹤0.01% |
221,700
-17,500
| -7% | -$493K |
|
|
GLXY
1008
CALL
Galaxy Digital Inc
GLXY
$4.71B
| $6.68M | ﹤0.01% |
244,200
-14,600
| -6% | -$406K |
|
1009
CALL
Ecolab
ECL
$78.3B
| $6.66M | ﹤0.01% |
23,900
+20,900
| +697% | +$5.5M |
|
1010
PUT
Elevance Health
ELV
$85.9B
| $6.65M | ﹤0.01% |
17,200
-1,000
| -5% | -$371K |
|
1011
PUT
Centrus Energy
LEU
$3.01B
| $6.65M | ﹤0.01% |
39,600
+20,500
| +107% | +$3.83M |
|
|
FRMI
1012
CALL
Fermi Inc
FRMI
$2.89B
| $6.6M | ﹤0.01% |
720,200
+233,200
| +48% | +$1.47M |
|
1013
First Solar
FSLR
$19.1B
| $6.59M | ﹤0.01% |
+27,934
| New | +$6.55M |
|
|
VG
1014
PUT
Venture Global Inc
VG
$31.6B
| $6.56M | ﹤0.01% |
589,800
+270,100
| +84% | +$3.42M |
|
|
FETH
1015
CALL
Fidelity Ethereum Fund
FETH
$1.45B
| $6.55M | ﹤0.01% |
416,200
+211,300
| +103% | +$4.33M |
|
1016
PUT
POET Technologies
POET
$1.34B
| $6.55M | ﹤0.01% |
636,700
+348,500
| +121% | +$3.79M |
|
1017
CALL
Regions Financial
RF
$23.5B
| $6.54M | ﹤0.01% |
216,700
+122,100
| +129% | +$3.43M |
|
1018
PUT
On Holding
ONON
$10B
| $6.54M | ﹤0.01% |
184,600
-3,800
| -2% | -$139K |
|
1019
PUT
Canadian Natural Resources
CNQ
$97.7B
| $6.54M | ﹤0.01% |
165,500
-26,300
| -14% | -$1.2M |
|
1020
PUT
Stryker
SYK
$104B
| $6.52M | ﹤0.01% |
20,700
+6,300
| +44% | +$1.99M |
|
1021
CALL
FedEx
FDX
$67.7B
| $6.52M | ﹤0.01% |
30,400
-12,500
| -29% | -$4.54M |
|
1022
CALL
SolarEdge
SEDG
$2.01B
| $6.52M | ﹤0.01% |
111,500
-28,200
| -20% | -$1.48M |
|
1023
Vishay Intertechnology
VSH
$4.99B
| $6.51M | ﹤0.01% |
121,073
+120,186
| +13,550% | +$4.92M |
|
1024
PUT
Prudential Financial
PRU
$41.2B
| $6.51M | ﹤0.01% |
60,300
+17,300
| +40% | +$1.76M |
|
1025
CALL
Marriott International
MAR
$91.8B
| $6.49M | ﹤0.01% |
17,500
+1,100
| +7% | +$406K |
|
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.