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
| 1 | +$168M | |
| 2 | +$141M | |
| 3 | +$121M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| 1 | +$174M | |
| 2 | +$87.7M | |
| 3 | +$62.2M | |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| 1 | Technology | 28.63% |
| 2 | Communication Services | 10.32% |
| 3 | Consumer Discretionary | 9.84% |
| 4 | Healthcare | 9.22% |
| 5 | Industrials | 4.62% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
NVIDIA
NVDA
$4.97T
| $263M | 8.15% |
1,509,153
+768,382
|
|
||
2
Amazon
AMZN
$2.57T
| $159M | 4.93% |
+764,884
|
|
||
3
State Street SPDR S&P 500 ETF Trust
SPY
$774B
| $132M | 4.08% |
202,806
+115,288
|
|
||
|
4
Meta Platforms (Facebook)
META
$1.44T
| $132M | 4.07% |
229,853
+167,185
|
|
||
5
TSMC
TSM
$2.2T
| $119M | 3.68% |
+351,805
|
|
||
|
6
SPDR Gold Trust
GLD
$139B
| $99.2M | 3.07% |
+230,612
|
|
||
7
Alphabet (Google) Class A
GOOGL
$4.39T
| $85.2M | 2.64% |
296,315
+257,547
|
|
||
8
UnitedHealth
UNH
$371B
| $77.8M | 2.41% |
287,580
+194,855
|
|
||
9
Oracle
ORCL
$530B
| $75.7M | 2.34% |
514,658
+383,259
|
|
||
10
Advanced Micro Devices
AMD
$834B
| $53M | 1.64% |
260,622
+204,147
|
|
||
11
iShares 20+ Year Treasury Bond ETF
TLT
$41.2B
| $52.7M | 1.63% |
+608,012
|
|
||
12
Microsoft
MSFT
$2.9T
| $50.6M | 1.57% |
136,729
+66,119
|
|
||
13
United States Oil Fund
USO
$1.83B
| $42M | 1.3% |
+329,788
|
|
||
|
14
Alphabet (Google) Class C
GOOG
$4.37T
| $41.7M | 1.29% |
145,393
+96,887
|
|
||
15
iShares Semiconductor ETF
SOXX
$40.1B
| $38.2M | 1.18% |
116,273
-39,820
|
|
||
16
Lumentum
LITE
$71.7B
| $37.1M | 1.15% |
52,807
+35,085
|
|
||
17
VanEck Semiconductor ETF
SMH
$70.8B
| $35.9M | 1.11% |
93,701
+16,075
|
|
||
18
Pfizer
PFE
$149B
| $35.6M | 1.1% |
1,266,685
-224,352
|
|
||
19
Palantir
PLTR
$307B
| $33.8M | 1.05% |
231,292
+40,002
|
|
||
20
Intel
INTC
$626B
| $33.4M | 1.03% |
757,722
-324,524
|
|
||
21
SLB Ltd
SLB
$84B
| $28.1M | 0.87% |
547,131
+68,056
|
|
||
22
Cigna
CI
$78.8B
| $26.2M | 0.81% |
98,203
-41,822
|
|
||
23
Global X Uranium ETF
URA
$6.32B
| $22.8M | 0.7% |
+470,104
|
|
||
24
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$29.6B
| $22.7M | 0.7% |
+208,171
|
|
||
25
ASML
ASML
$718B
| $22.1M | 0.68% |
+16,741
|
|