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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Rogers Corp
ROG
$1.48B
| $655K | ﹤0.01% |
5,520
-421
| -7% | -$50K |
|
577
Target Hospitality
TH
$864M
| $655K | ﹤0.01% |
+60,301
| New | +$655K |
|
578
Nutrien
NTR
$27.5B
| $652K | ﹤0.01% |
12,018
-4,053
| -25% | -$220K |
|
579
Intuitive Surgical
ISRG
$157B
| $651K | ﹤0.01% |
1,632
-31,953
| -95% | -$12.7M |
|
580
MGIC Investment
MTG
$6.53B
| $651K | ﹤0.01% |
+29,153
| New | +$651K |
|
581
Powell Industries
POWL
$3.59B
| $651K | ﹤0.01% |
4,581
-121
| -3% | -$17.2K |
|
582
Teladoc Health
TDOC
$1.4B
| $649K | ﹤0.01% |
43,002
-5,348
| -11% | -$80.7K |
|
583
Allegro MicroSystems
ALGM
$5.82B
| $648K | ﹤0.01% |
+24,040
| New | +$648K |
|
584
Franklin Resources
BEN
$12.7B
| $647K | ﹤0.01% |
+23,024
| New | +$647K |
|
585
Atlas Energy Solutions
AESI
$1.34B
| $645K | ﹤0.01% |
+28,531
| New | +$645K |
|
586
Silicon Laboratories
SLAB
$4.5B
| $645K | ﹤0.01% |
4,491
+2,303
| +105% | +$331K |
|
587
ProShares Short QQQ
PSQ
$532M
| $643K | ﹤0.01% |
+14,694
| New | +$643K |
|
588
Leggett & Platt
LEG
$1.27B
| $635K | ﹤0.01% |
33,210
+16,863
| +103% | +$322K |
|
|
SKX
589
DELISTED
Skechers
SKX
| $635K | ﹤0.01% |
+10,379
| New | +$635K |
|
590
Zai Lab
ZLAB
$3.63B
| $634K | ﹤0.01% |
39,627
+24,834
| +168% | +$397K |
|
591
Community Health Systems
CYH
$426M
| $632K | ﹤0.01% |
180,625
+26,794
| +17% | +$93.8K |
|
592
Resideo Technologies
REZI
$6.25B
| $630K | ﹤0.01% |
28,126
+15,829
| +129% | +$355K |
|
|
CAN
593
Canaan Creative
CAN
$385M
| $629K | ﹤0.01% |
+414,237
| New | +$629K |
|
594
Celestica
CLS
$29.1B
| $623K | ﹤0.01% |
+13,864
| New | +$623K |
|
595
Madison Square Garden
MSGS
$5.13B
| $623K | ﹤0.01% |
+3,379
| New | +$623K |
|
|
LSXMA
596
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $622K | ﹤0.01% |
20,943
-4,726
| -18% | -$140K |
|
597
HighPeak Energy
HPK
$844M
| $617K | ﹤0.01% |
39,151
+12,259
| +46% | +$193K |
|
598
WD-40
WDFC
$2.85B
| $616K | ﹤0.01% |
2,434
+790
| +48% | +$200K |
|
599
Honda
HMC
$43.3B
| $612K | ﹤0.01% |
+16,444
| New | +$612K |
|
|
NNDM
600
Nano Dimension
NNDM
$304M
| $612K | ﹤0.01% |
220,095
+197,251
| +863% | +$548K |
|