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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1076
CALL
Crescent Energy
CRGY
$3.72B
| $5.3M | ﹤0.01% |
392,900
+240,500
| +158% | +$2.52M |
|
1077
Under Armour
UAA
$3B
| $5.3M | ﹤0.01% |
897,041
-243,455
| -21% | -$1.58M |
|
|
PPL
1078
CALL
PPL Corp
PPL
$27.3B
| $5.29M | ﹤0.01% |
138,500
+17,600
| +15% | +$649K |
|
1079
CALL
Exelon
EXC
$48.6B
| $5.29M | ﹤0.01% |
107,900
-10,000
| -8% | -$465K |
|
1080
CALL
Silicon Motion
SIMO
$9.19B
| $5.29M | ﹤0.01% |
+47,100
| New | +$5.72M |
|
|
SOLT
1081
CALL
2x Solana ETF
SOLT
$113M
| $5.28M | ﹤0.01% |
+117,800
| New | +$9.78M |
|
1082
PUT
Cummins
CMI
$91.7B
| $5.27M | ﹤0.01% |
9,800
+1,400
| +17% | +$792K |
|
1083
PUT
Coupang
CPNG
$27.8B
| $5.27M | ﹤0.01% |
279,200
+94,800
| +51% | +$1.86M |
|
1084
PUT
Entergy
ETR
$54.1B
| $5.27M | ﹤0.01% |
46,900
+41,700
| +802% | +$4.19M |
|
1085
CALL
FTAI Aviation
FTAI
$22.2B
| $5.27M | ﹤0.01% |
21,500
-4,600
| -18% | -$1.22M |
|
1086
PUT
Bunge Global
BG
$23.6B
| $5.27M | ﹤0.01% |
41,400
-53,400
| -56% | -$6.2M |
|
1087
CALL
Navitas Semiconductor
NVTS
$2.66B
| $5.27M | ﹤0.01% |
600,400
-310,100
| -34% | -$2.86M |
|
1088
PUT
Etsy
ETSY
$7.65B
| $5.26M | ﹤0.01% |
105,200
-77,000
| -42% | -$4.21M |
|
1089
CALL
Omnicom Group
OMC
$22.7B
| $5.26M | ﹤0.01% |
69,800
+46,800
| +203% | +$3.63M |
|
1090
CALL
Intellia Therapeutics
NTLA
$1.5B
| $5.23M | ﹤0.01% |
407,900
-43,700
| -10% | -$557K |
|
1091
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $5.22M | ﹤0.01% |
+196,300
| New | +$4.68M |
|
1092
PUT
American International
AIG
$41.9B
| $5.18M | ﹤0.01% |
68,800
-48,100
| -41% | -$3.68M |
|
|
SLVR
1093
Sprott Silver Miners & Physical Silver ETF
SLVR
$629M
| $5.17M | ﹤0.01% |
87,438
+11,980
| +16% | +$800K |
|
1094
CALL
O'Reilly Automotive
ORLY
$72.4B
| $5.15M | ﹤0.01% |
55,800
-16,300
| -23% | -$1.53M |
|
1095
PUT
Sunrun
RUN
$2.37B
| $5.13M | ﹤0.01% |
378,400
-1,153,300
| -75% | -$19.2M |
|
1096
CALL
Rubrik
RBRK
$15.1B
| $5.12M | ﹤0.01% |
104,600
+700
| +0.7% | +$40.2K |
|
1097
CALL
SELLAS Life Sciences
SLS
$2.23B
| $5.11M | ﹤0.01% |
+1,207,400
| New | +$5.4M |
|
1098
PUT
Revolution Medicines
RVMD
$40.2B
| $5.11M | ﹤0.01% |
52,500
+40,300
| +330% | +$4.07M |
|
1099
CALL
QuantumScape Corp
QS
$3B
| $5.1M | ﹤0.01% |
799,700
-2,006,700
| -72% | -$16.7M |
|
1100
Canadian Natural Resources
CNQ
$96.9B
| $5.1M | ﹤0.01% |
104,671
+87,846
| +522% | +$3.61M |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.