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 | |
|---|---|---|---|---|---|---|
601
CALL
Viasat
VSAT
$10.1B
| $14.3M | 0.01% |
159,200
+114,000
| +252% | +$7.55M |
|
602
CALL
NXP Semiconductors
NXPI
$60B
| $14.2M | 0.01% |
50,600
+11,100
| +28% | +$3.06M |
|
603
CALL
Marathon Petroleum
MPC
$111B
| $14.1M | 0.01% |
55,100
-13,100
| -19% | -$3.22M |
|
604
CALL
Ulta Beauty
ULTA
$23.3B
| $14.1M | 0.01% |
31,200
+4,800
| +18% | +$2.44M |
|
605
CALL
Sprott Uranium Miners ETF
URNM
$1.86B
| $14M | 0.01% |
275,000
+13,700
| +5% | +$847K |
|
606
PUT
The Kraft Heinz Company
KHC
$28B
| $14M | 0.01% |
594,200
+246,300
| +71% | +$5.68M |
|
|
AMZO
607
CALL
Tradr 2X Short AMZN Daily ETF
AMZO
$3.3M
| $14M | 0.01% |
371,000
+342,100
| +1,184% | +$5.86M |
|
608
CALL
Roku
ROKU
$22.7B
| $14M | 0.01% |
101,400
-57,000
| -36% | -$6.95M |
|
609
CALL
XPeng
XPEV
$9.69B
| $13.9M | 0.01% |
1,053,100
+513,000
| +95% | +$8.13M |
|
610
CALL
Kinder Morgan
KMI
$68.5B
| $13.9M | 0.01% |
435,500
-284,000
| -39% | -$9.15M |
|
|
DOCU
611
PUT
DocuSign
DOCU
$12.6B
| $13.9M | 0.01% |
313,300
-24,700
| -7% | -$1.16M |
|
612
GE Aerospace
GE
$339B
| $13.9M | 0.01% |
+37,191
| New | +$11.6M |
|
|
BNY
613
CALL
Bank of New York Mellon
BNY
$102B
| $13.9M | 0.01% |
96,000
-7,400
| -7% | -$1.01M |
|
614
CALL
Agnico Eagle Mines
AEM
$98.5B
| $13.8M | 0.01% |
88,800
-19,400
| -18% | -$3.59M |
|
615
CALL
eBay
EBAY
$48B
| $13.8M | 0.01% |
123,100
+71,000
| +136% | +$7.58M |
|
616
PUT
Live Nation Entertainment
LYV
$39.8B
| $13.7M | 0.01% |
75,000
-19,400
| -21% | -$3.19M |
|
617
CALL
Amplify Online Retail ETF
IBUY
$120M
| $13.7M | 0.01% |
524,600
-788,200
| -60% | -$52.6M |
|
618
Nike
NKE
$53B
| $13.7M | 0.01% |
333,475
-64,699
| -16% | -$2.85M |
|
619
PUT
CleanSpark
CLSK
$3.58B
| $13.6M | 0.01% |
933,300
-126,400
| -12% | -$1.78M |
|
620
CALL
SAP
SAP
$243B
| $13.5M | 0.01% |
87,900
+54,000
| +159% | +$9.21M |
|
|
HUT
621
CALL
Hut 8
HUT
$11.9B
| $13.5M | 0.01% |
116,700
-61,700
| -35% | -$5.98M |
|
622
CALL
Medtronic
MDT
$113B
| $13.5M | 0.01% |
172,100
+72,200
| +72% | +$5.82M |
|
623
CALL
FuelCell Energy
FCEL
$1.32B
| $13.4M | 0.01% |
373,400
+197,200
| +112% | +$3.2M |
|
624
CALL
Lowe's Companies
LOW
$106B
| $13.3M | 0.01% |
60,500
-5,600
| -8% | -$1.27M |
|
625
PUT
Duolingo
DUOL
$6.71B
| $13.3M | 0.01% |
115,700
-50,300
| -30% | -$5.51M |
|
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.