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 | +$216M | |
| 2 | +$159M | |
| 3 | +$128M | |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 | +$141M | |
| 2 | +$53.1M | |
| 3 | +$45.7M | |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
26
Wells Fargo
WFC
$271B
| $21.3M | 0.01% |
265,915
+38,763
|
|
||
27
Novo Nordisk
NVO
$223B
| $21.1M | 0.01% |
305,237
+66,227
|
|
||
|
B
28
Barrick Mining
B
$63B
| $21M | 0.01% |
1,011,038
-224,616
|
|
||
29
Iris Energy
IREN
$15.8B
| $20.1M | 0.01% |
1,382,126
+94,371
|
|
||
30
Walmart
WMT
$825B
| $19.8M | 0.01% |
202,277
+143,462
|
|
||
31
Oracle
ORCL
$647B
| $19.3M | 0.01% |
+88,074
|
|
||
32
Energy Transfer Partners
ET
$56.9B
| $19.1M | 0.01% |
1,051,640
-4,128
|
|
||
33
Chipotle Mexican Grill
CMG
$41.4B
| $18.8M | 0.01% |
+333,998
|
|
||
34
iShares Bitcoin Trust
IBIT
$77.6B
| $17.7M | 0.01% |
289,568
-213,451
|
|
||
35
Direxion Daily Financial Bull 3x Shares
FAS
$2.58B
| $17.6M | 0.01% |
104,672
+23,052
|
|
||
36
Nu Holdings
NU
$78.2B
| $17.1M | 0.01% |
1,246,517
+806,594
|
|
||
37
ASML
ASML
$403B
| $16.8M | 0.01% |
+21,017
|
|
||
38
iShares MSCI Emerging Markets ETF
EEM
$21.1B
| $14.8M | 0.01% |
306,415
+142,501
|
|
||
39
US Bancorp
USB
$74.4B
| $14.5M | 0.01% |
+319,512
|
|
||
40
Industrial Select Sector SPDR Fund
XLI
$23.8B
| $14.4M | 0.01% |
+97,333
|
|
||
41
iShares Gold Trust
IAU
$63.8B
| $13.1M | 0.01% |
210,513
+52,081
|
|
||
42
SoundHound AI
SOUN
$5.56B
| $13M | 0.01% |
1,215,270
+873,282
|
|
||
43
ProShares Short QQQ
PSQ
$516M
| $13M | 0.01% |
385,908
-109,412
|
|
||
44
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$16.1B
| $13M | 0.01% |
515,960
-366,764
|
|
||
45
Boston Scientific
BSX
$154B
| $12.7M | 0.01% |
118,658
+36,984
|
|
||
46
Coinbase
COIN
$82B
| $12.7M | 0.01% |
36,126
-51,432
|
|
||
47
iShares US Home Construction ETF
ITB
$3.02B
| $12.6M | 0.01% |
+134,719
|
|
||
48
PepsiCo
PEP
$197B
| $12.5M | 0.01% |
+94,468
|
|
||
49
Rio Tinto
RIO
$116B
| $12.1M | 0.01% |
207,861
+56,675
|
|
||
50
Global X Uranium ETF
URA
$5.05B
| $11.8M | 0.01% |
304,577
+125,506
|
|