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 |
Microsoft
MSFT
|
$101M |
| 2 |
NVIDIA
NVDA
|
$66M |
| 3 |
Citigroup
C
|
$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$64M |
| 3 |
Meta Platforms (Facebook)
META
|
$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
$34.3M |
| 5 |
PayPal
PYPL
|
$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
76
Illumina
ILMN
$15.2B
| $6.61M | 0.01% |
34,627
+23,607
| +214% | +$4.5M |
|
77
SPDR S&P Biotech ETF
XBI
$5.29B
| $6.55M | 0.01% |
+82,521
| New | +$6.55M |
|
78
Procter & Gamble
PG
$370B
| $6.18M | 0.01% |
48,950
+46,790
| +2,166% | +$5.91M |
|
79
Morgan Stanley
MS
$237B
| $6.04M | 0.01% |
76,477
-251,027
| -77% | -$19.8M |
|
80
Marvell Technology
MRVL
$53.7B
| $6.04M | 0.01% |
140,775
-58,045
| -29% | -$2.49M |
|
81
Boston Properties
BXP
$11.7B
| $5.97M | 0.01% |
+79,605
| New | +$5.97M |
|
82
Zillow
Z
$20.2B
| $5.77M | 0.01% |
+201,603
| New | +$5.77M |
|
83
Invesco CurrencyShares Japanese Yen Trust
FXY
$559M
| $5.63M | 0.01% |
87,070
+80,871
| +1,305% | +$5.22M |
|
84
lululemon athletica
LULU
$23.8B
| $5.59M | 0.01% |
20,010
+15,638
| +358% | +$4.37M |
|
85
AbbVie
ABBV
$374B
| $5.5M | 0.01% |
+40,958
| New | +$5.5M |
|
86
SPDR Dow Jones Industrial Average ETF Trust
DIA
$39.7B
| $5.48M | 0.01% |
19,083
+19,081
| +954,050% | +$5.48M |
|
87
Datadog
DDOG
$46.2B
| $5.48M | 0.01% |
61,713
-33,861
| -35% | -$3.01M |
|
88
Vale
VALE
$43.6B
| $5.41M | 0.01% |
406,401
+74,307
| +22% | +$990K |
|
89
Qfin Holdings, Inc. American Depositary Shares
QFIN
$3.86B
| $5.37M | 0.01% |
419,017
+411,384
| +5,390% | +$5.27M |
|
90
Wheaton Precious Metals
WPM
$46.5B
| $5.37M | 0.01% |
165,942
+45,177
| +37% | +$1.46M |
|
91
Caterpillar
CAT
$194B
| $5.31M | 0.01% |
+32,345
| New | +$5.31M |
|
92
Wynn Resorts
WYNN
$13.1B
| $5.28M | 0.01% |
+83,733
| New | +$5.28M |
|
93
Macy's
M
$4.42B
| $5.24M | 0.01% |
334,566
+256,432
| +328% | +$4.02M |
|
94
Starbucks
SBUX
$99.2B
| $5.22M | 0.01% |
61,916
-163,667
| -73% | -$13.8M |
|
95
Mondelez International
MDLZ
$79.3B
| $5.18M | 0.01% |
+94,560
| New | +$5.18M |
|
96
EQT Corp
EQT
$32.2B
| $5.14M | 0.01% |
126,024
+70,187
| +126% | +$2.86M |
|
97
Marriott International Class A Common Stock
MAR
$72B
| $5.11M | 0.01% |
36,477
+5,060
| +16% | +$709K |
|
98
Health Care Select Sector SPDR Fund
XLV
$33.8B
| $5.1M | 0.01% |
+42,147
| New | +$5.1M |
|
99
Nutrien
NTR
$27.6B
| $5.09M | 0.01% |
61,069
+3,626
| +6% | +$302K |
|
100
Global X Lithium & Battery Tech ETF
LIT
$1.07B
| $5.06M | 0.01% |
76,590
+59,898
| +359% | +$3.96M |
|