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 | +$237M | |
| 2 | +$103M | |
| 3 | +$93.9M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.5M |
| 5 |
Pinduoduo
PDD
|
+$61.3M |
Top Sells
| 1 | +$129M | |
| 2 | +$108M | |
| 3 | +$89.1M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$79.3M |
| 5 |
Micron Technology
MU
|
+$64.3M |
Sector Composition
| 1 | Technology | 34.04% |
| 2 | Consumer Discretionary | 13.08% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.02% |
| 5 | Industrials | 3.96% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
NVIDIA
NVDA
$4.72T
| $401M | 0.21% |
2,149,094
-332,220
|
|
||
2
Apple
AAPL
$4.04T
| $294M | 0.15% |
1,153,494
+131,767
|
|
||
3
Microsoft
MSFT
$3.8T
| $237M | 0.12% |
+458,309
|
|
||
4
iShares Russell 2000 ETF
IWM
$69.9B
| $149M | 0.08% |
617,585
+424,988
|
|
||
5
UnitedHealth
UNH
$307B
| $111M | 0.06% |
320,056
+139,889
|
|
||
6
SPDR S&P 500 ETF Trust
SPY
$679B
| $103M | 0.05% |
154,283
+54,154
|
|
||
7
Amazon
AMZN
$2.61T
| $102M | 0.05% |
466,774
+427,796
|
|
||
|
8
iShares Bitcoin Trust
IBIT
$77.6B
| $99.4M | 0.05% |
1,528,615
+1,239,047
|
|
||
9
Intel
INTC
$181B
| $94.9M | 0.05% |
2,829,604
+388,152
|
|
||
10
Broadcom
AVGO
$1.68T
| $92.9M | 0.05% |
281,496
-270,198
|
|
||
11
Booking.com
BKNG
$167B
| $73.2M | 0.04% |
13,552
-11
|
|
||
12
Health Care Select Sector SPDR Fund
XLV
$37.7B
| $68.9M | 0.04% |
494,956
+161,376
|
|
||
13
Iris Energy
IREN
$15.8B
| $67.7M | 0.03% |
1,442,599
+60,473
|
|
||
|
14
Alphabet (Google) Class A
GOOGL
$3.46T
| $65.9M | 0.03% |
270,975
-443,553
|
|
||
|
15
Pinduoduo
PDD
$193B
| $61.3M | 0.03% |
+463,452
|
|
||
16
Tesla
TSLA
$1.43T
| $59.5M | 0.03% |
+133,826
|
|
||
17
SoFi Technologies
SOFI
$38.8B
| $42.5M | 0.02% |
1,607,981
+227,618
|
|
||
|
18
Micron Technology
MU
$275B
| $38.8M | 0.02% |
231,613
-384,566
|
|
||
19
Cigna
CI
$72.3B
| $38.4M | 0.02% |
133,228
+56,367
|
|
||
20
Nike
NKE
$94.9B
| $37.4M | 0.02% |
536,292
+13,500
|
|
||
21
Target
TGT
$41.8B
| $34.3M | 0.02% |
381,939
+272,045
|
|
||
22
Novo Nordisk
NVO
$223B
| $33M | 0.02% |
595,602
+290,365
|
|
||
23
Pfizer
PFE
$147B
| $33M | 0.02% |
1,296,490
+1,262,307
|
|
||
24
TSMC
TSM
$1.51T
| $32.6M | 0.02% |
116,776
-162,150
|
|
||
25
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$16.1B
| $30.7M | 0.02% |
881,942
+365,982
|
|