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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 3 |
NIO
NIO
|
$7.66M |
| 4 |
Alibaba
BABA
|
$7.54M |
| 5 |
Micron Technology
MU
|
$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
$101M |
| 2 |
SPDR Gold Trust
GLD
|
$15.2M |
| 3 |
Amazon
AMZN
|
$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
451
Horizon Kinetics Inflation Beneficiaries ETF
INFL
$1.26B
| $1.27M | ﹤0.01% |
42,013
| – | – |
|
452
Acadia Pharmaceuticals
ACAD
$4.26B
| $1.27M | ﹤0.01% |
51,352
+200
| +0.4% | +$4.95K |
|
453
Celldex Therapeutics
CLDX
$1.52B
| $1.27M | ﹤0.01% |
36,911
-200
| -0.5% | -$6.88K |
|
|
JO
454
DELISTED
iPath Series B Bloomberg Coffee Subindex Total ReturnSM ETN
JO
| $1.27M | ﹤0.01% |
29,261
-100
| -0.3% | -$4.33K |
|
455
Amplify Cybersecurity ETF
HACK
$2.29B
| $1.26M | ﹤0.01% |
20,859
| – | – |
|
456
Nokia
NOK
$24.5B
| $1.26M | ﹤0.01% |
234,945
+400
| +0.2% | +$2.15K |
|
|
457
SPDR Gold Trust
GLD
$112B
| $1.25M | ﹤0.01% |
7,547
-91,517
| -92% | -$15.2M |
|
|
BLUE
458
DELISTED
bluebird bio
BLUE
| $1.25M | ﹤0.01% |
2,981
+207
| +7% | +$86.9K |
|
459
Southern Copper
SCCO
$83.6B
| $1.25M | ﹤0.01% |
20,714
| – | – |
|
460
Global X Social Media ETF
SOCL
$151M
| $1.24M | ﹤0.01% |
17,226
| – | – |
|
461
Green Dot
GDOT
$760M
| $1.24M | ﹤0.01% |
26,049
| – | – |
|
462
Targa Resources
TRGP
$34.9B
| $1.24M | ﹤0.01% |
27,600
+2,483
| +10% | +$111K |
|
|
WW
463
DELISTED
WW International
WW
| $1.23M | ﹤0.01% |
34,294
+7,551
| +28% | +$272K |
|
464
iShares MSCI China A ETF
CNYA
$213M
| $1.23M | ﹤0.01% |
28,016
+900
| +3% | +$39.6K |
|
465
Thor Industries
THO
$5.94B
| $1.23M | ﹤0.01% |
10,577
+2,285
| +28% | +$266K |
|
466
Viatris
VTRS
$12.2B
| $1.23M | ﹤0.01% |
83,335
-21,049
| -20% | -$310K |
|
|
GBT
467
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.23M | ﹤0.01% |
32,897
+2,200
| +7% | +$82.1K |
|
468
ProShares Ultra Bloomberg Natural Gas
BOIL
$129M
| $1.22M | ﹤0.01% |
343
| – | – |
|
469
GoodRx Holdings
GDRX
$1.39B
| $1.21M | ﹤0.01% |
35,050
+1,845
| +6% | +$63.8K |
|
470
Logitech
LOGI
$15.8B
| $1.21M | ﹤0.01% |
10,075
+3,704
| +58% | +$446K |
|
471
iShares US Basic Materials ETF
IYM
$565M
| $1.21M | ﹤0.01% |
9,211
| – | – |
|
472
Arista Networks
ANET
$180B
| $1.2M | ﹤0.01% |
52,944
+17,856
| +51% | +$405K |
|
473
HUB Group
HUBG
$2.29B
| $1.19M | ﹤0.01% |
34,734
| – | – |
|
474
HDFC Bank
HDB
$361B
| $1.19M | ﹤0.01% |
16,477
+1,689
| +11% | +$122K |
|
475
Qfin Holdings, Inc. American Depositary Shares
QFIN
$3.81B
| $1.19M | ﹤0.01% |
30,631
+29
| +0.1% | +$1.13K |
|