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
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$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 | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
Newmont
NEM
$89.8B
| $11.4M | 0.01% |
196,522
-131,879
| -40% | -$7.68M |
|
52
PG&E
PCG
$32.8B
| $11.2M | 0.01% |
+799,868
| New | +$11.2M |
|
53
AST SpaceMobile
ASTS
$12.1B
| $10.9M | 0.01% |
233,885
-75,213
| -24% | -$3.51M |
|
54
Humana
HUM
$30.4B
| $10.9M | 0.01% |
44,637
-17,035
| -28% | -$4.16M |
|
55
Target
TGT
$40B
| $10.8M | 0.01% |
109,894
+31,793
| +41% | +$3.14M |
|
56
Schlumberger
SLB
$51.4B
| $10.8M | 0.01% |
318,601
+58,562
| +23% | +$1.98M |
|
57
Baidu
BIDU
$46.5B
| $10.7M | 0.01% |
124,357
-204,568
| -62% | -$17.5M |
|
58
Moderna
MRNA
$9.82B
| $10.5M | 0.01% |
381,787
+190,557
| +100% | +$5.26M |
|
59
Mercado Libre
MELI
$124B
| $10.5M | 0.01% |
4,010
+214
| +6% | +$559K |
|
60
Citigroup
C
$189B
| $10.5M | 0.01% |
123,006
-396,031
| -76% | -$33.7M |
|
61
Marvell Technology
MRVL
$64B
| $9.98M | 0.01% |
+128,883
| New | +$9.98M |
|
62
Adobe
ADBE
$155B
| $9.92M | 0.01% |
+25,630
| New | +$9.92M |
|
63
Direxion Daily TSLA Bull 2X Shares
TSLL
$8.86B
| $9.64M | 0.01% |
816,632
+544,253
| +200% | +$6.43M |
|
64
American Airlines Group
AAL
$8.21B
| $9.55M | 0.01% |
851,320
+373,085
| +78% | +$4.19M |
|
65
Delta Air Lines
DAL
$39B
| $9.35M | 0.01% |
+190,017
| New | +$9.35M |
|
66
Crown Castle
CCI
$40.8B
| $9.31M | 0.01% |
90,620
+28,088
| +45% | +$2.89M |
|
67
NRG Energy
NRG
$31.8B
| $9.31M | 0.01% |
57,955
+15,575
| +37% | +$2.5M |
|
|
68
Amazon
AMZN
$2.47T
| $8.55M | ﹤0.01% |
38,978
-242,180
| -86% | -$53.1M |
|
69
NextEra Energy
NEE
$146B
| $8.38M | ﹤0.01% |
120,670
+95,806
| +385% | +$6.65M |
|
70
Qualcomm
QCOM
$180B
| $8.03M | ﹤0.01% |
+50,398
| New | +$8.03M |
|
71
Dell
DELL
$88.7B
| $7.9M | ﹤0.01% |
64,474
-189,459
| -75% | -$23.2M |
|
72
Centene
CNC
$15.6B
| $7.7M | ﹤0.01% |
141,894
+136,020
| +2,316% | +$7.38M |
|
73
Kenvue
KVUE
$35.2B
| $7.66M | ﹤0.01% |
366,113
+189,525
| +107% | +$3.97M |
|
74
Materials Select Sector SPDR Fund
XLB
$5.55B
| $7.63M | ﹤0.01% |
86,906
+14,961
| +21% | +$1.31M |
|
75
TransDigm Group
TDG
$72.3B
| $7.55M | ﹤0.01% |
4,966
+4,718
| +1,902% | +$7.17M |
|