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
|
$60M |
| 2 |
Microsoft
MSFT
|
$58.6M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$52.5M |
| 4 |
PayPal
PYPL
|
$40.9M |
| 5 |
Netflix
NFLX
|
$29.7M |
Top Sells
| 1 |
Apple
AAPL
|
$48.7M |
| 2 |
Walmart
WMT
|
$45.2M |
| 3 |
Adobe
ADBE
|
$40.6M |
| 4 |
VanEck Oil Services ETF
OIH
|
$34.2M |
| 5 |
Enphase Energy
ENPH
|
$27.2M |
Sector Composition
| 1 | Technology | 21.17% |
| 2 | Healthcare | 10.87% |
| 3 | Consumer Discretionary | 10.73% |
| 4 | Communication Services | 10.55% |
| 5 | Financials | 7.54% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
51
Mercado Libre
MELI
$120B
| $9.49M | 0.01% |
8,009
+6,086
| +316% | +$7.21M |
|
|
CTLT
52
DELISTED
CATALENT, INC.
CTLT
| $9.46M | 0.01% |
218,237
+211,724
| +3,251% | +$9.18M |
|
53
Gilead Sciences
GILD
$140B
| $9.43M | 0.01% |
+122,315
| New | +$9.43M |
|
|
XYZ
54
Block, Inc.
XYZ
$46.2B
| $9.27M | 0.01% |
139,197
-39,306
| -22% | -$2.62M |
|
55
Norwegian Cruise Line
NCLH
$11.5B
| $9.13M | 0.01% |
+419,469
| New | +$9.13M |
|
56
CrowdStrike
CRWD
$104B
| $9.06M | 0.01% |
61,673
-40,833
| -40% | -$6M |
|
57
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.7B
| $9.05M | 0.01% |
26,319
-59,515
| -69% | -$20.5M |
|
58
Check Point Software Technologies
CHKP
$20.6B
| $8.91M | 0.01% |
+70,920
| New | +$8.91M |
|
59
Delta Air Lines
DAL
$40B
| $8.85M | 0.01% |
186,119
-195,275
| -51% | -$9.28M |
|
60
Snap
SNAP
$12.3B
| $8.71M | 0.01% |
+735,741
| New | +$8.71M |
|
61
Spectrum Brands
SPB
$1.32B
| $8.49M | 0.01% |
108,733
+74,783
| +220% | +$5.84M |
|
62
Suncor Energy
SU
$49.3B
| $8.41M | 0.01% |
286,900
+39,406
| +16% | +$1.16M |
|
63
Strategy Inc Common Stock Class A
MSTR
$93.6B
| $8.4M | 0.01% |
24,524
+9,830
| +67% | +$3.37M |
|
64
American Express
AXP
$225B
| $8.21M | 0.01% |
47,132
+22,760
| +93% | +$3.96M |
|
65
Teva Pharmaceuticals
TEVA
$21.5B
| $7.99M | 0.01% |
1,061,541
+22,734
| +2% | +$171K |
|
66
Zoom
ZM
$25B
| $7.89M | 0.01% |
116,217
-141,345
| -55% | -$9.59M |
|
67
Southwest Airlines
LUV
$17B
| $7.73M | 0.01% |
213,480
+104,883
| +97% | +$3.8M |
|
|
HZNP
68
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $7.71M | 0.01% |
74,963
+44,457
| +146% | +$4.57M |
|
69
iShares Russell 1000 Growth ETF
IWF
$117B
| $7.7M | 0.01% |
27,969
+26,428
| +1,715% | +$7.27M |
|
70
Agnico Eagle Mines
AEM
$74.7B
| $7.45M | 0.01% |
+149,036
| New | +$7.45M |
|
71
AbbVie
ABBV
$374B
| $7.36M | 0.01% |
54,641
-12,885
| -19% | -$1.74M |
|
72
ProShares UltraPro Short QQQ
SQQQ
$2.39B
| $7.1M | 0.01% |
375,259
-109,639
| -23% | -$2.07M |
|
73
FIVE9
FIVN
$2.05B
| $7.09M | 0.01% |
86,019
+69,532
| +422% | +$5.73M |
|
74
Palantir
PLTR
$367B
| $7.07M | 0.01% |
461,460
-425,882
| -48% | -$6.53M |
|
75
Albemarle
ALB
$9.43B
| $7.04M | 0.01% |
31,543
+4,238
| +16% | +$945K |
|