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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Starwood Property Trust
STWD
$7.53B
| $1.13M | ﹤0.01% |
+59,490
| New | +$1.13M |
|
427
LKQ Corp
LKQ
$8.39B
| $1.12M | ﹤0.01% |
26,964
+9,641
| +56% | +$401K |
|
428
McEwen Inc.
MUX
$734M
| $1.11M | ﹤0.01% |
120,842
+85,376
| +241% | +$784K |
|
429
Rollins
ROL
$27.7B
| $1.11M | ﹤0.01% |
22,739
+11,472
| +102% | +$559K |
|
430
Global E Online
GLBE
$6.16B
| $1.11M | ﹤0.01% |
+30,506
| New | +$1.11M |
|
431
Altimmune
ALT
$334M
| $1.1M | ﹤0.01% |
166,089
+19,830
| +14% | +$132K |
|
432
Incyte
INCY
$16.9B
| $1.1M | ﹤0.01% |
18,175
+11,745
| +183% | +$711K |
|
433
ICL Group
ICL
$7.87B
| $1.1M | ﹤0.01% |
256,880
-11,112
| -4% | -$47.5K |
|
434
MSC Industrial Direct
MSM
$5.17B
| $1.1M | ﹤0.01% |
+13,849
| New | +$1.1M |
|
435
Viatris
VTRS
$12.2B
| $1.08M | ﹤0.01% |
101,140
-94,143
| -48% | -$1M |
|
436
Plug Power
PLUG
$1.63B
| $1.07M | ﹤0.01% |
+461,224
| New | +$1.07M |
|
437
Applied Digital
APLD
$3.98B
| $1.07M | ﹤0.01% |
180,285
+174,780
| +3,175% | +$1.04M |
|
438
UGI
UGI
$7.37B
| $1.06M | ﹤0.01% |
46,410
+24,567
| +112% | +$562K |
|
439
Alta Equipment Group
ALTG
$265M
| $1.06M | ﹤0.01% |
131,726
+96,292
| +272% | +$774K |
|
|
LSXMA
440
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $1.06M | ﹤0.01% |
47,658
+26,715
| +128% | +$591K |
|
441
Global X Silver Miners ETF NEW
SIL
$3.01B
| $1.05M | ﹤0.01% |
33,801
-4,198
| -11% | -$131K |
|
442
Blackstone
BX
$135B
| $1.02M | ﹤0.01% |
+8,277
| New | +$1.02M |
|
443
First Majestic Silver
AG
$4.47B
| $1.01M | ﹤0.01% |
170,858
+77,827
| +84% | +$461K |
|
444
BWX Technologies
BWXT
$14.8B
| $1.01M | ﹤0.01% |
+10,642
| New | +$1.01M |
|
445
Nextracker
NXT
$9.52B
| $1.01M | ﹤0.01% |
21,489
-36,626
| -63% | -$1.72M |
|
446
Concentrix
CNXC
$3.31B
| $1M | ﹤0.01% |
15,846
-866
| -5% | -$54.8K |
|
447
Madrigal Pharmaceuticals
MDGL
$10.1B
| $1M | ﹤0.01% |
3,572
+2,979
| +502% | +$834K |
|
448
BJ's Restaurants
BJRI
$742M
| $997K | ﹤0.01% |
28,751
-8,602
| -23% | -$298K |
|
449
Shake Shack
SHAK
$3.93B
| $993K | ﹤0.01% |
+11,035
| New | +$993K |
|
450
Natural Resource Partners
NRP
$1.33B
| $991K | ﹤0.01% |
11,065
-10,272
| -48% | -$920K |
|