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 |
Invesco QQQ Trust
QQQ
|
$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
$75.9M |
| 3 |
NVIDIA
NVDA
|
$42.6M |
| 4 |
Netflix
NFLX
|
$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$24.3M |
| 5 |
Broadcom
AVGO
|
$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Lyft
LYFT
$7.02B
| $3.9M | 0.01% |
+118,252
| New | +$3.9M |
|
102
PG&E
PCG
$33.7B
| $3.9M | 0.01% |
439,876
+439,131
| +58,944% | +$3.89M |
|
103
iShares MSCI Emerging Markets ETF
EEM
$19B
| $3.85M | 0.01% |
96,212
+96,012
| +48,006% | +$3.84M |
|
104
Mercado Libre
MELI
$120B
| $3.82M | 0.01% |
3,877
+860
| +29% | +$848K |
|
105
Vanguard S&P 500 ETF
VOO
$724B
| $3.77M | 0.01% |
13,292
+13,192
| +13,192% | +$3.74M |
|
106
Galapagos
GLPG
$2.06B
| $3.73M | 0.01% |
18,883
+4,872
| +35% | +$961K |
|
107
Twilio
TWLO
$16.1B
| $3.71M | 0.01% |
16,895
-2,925
| -15% | -$642K |
|
108
Datadog
DDOG
$46.2B
| $3.69M | 0.01% |
42,429
+6,863
| +19% | +$597K |
|
109
ServiceNow
NOW
$191B
| $3.49M | 0.01% |
8,621
+5,276
| +158% | +$2.14M |
|
110
SPDR Bloomberg High Yield Bond ETF
JNK
$8.07B
| $3.47M | 0.01% |
+34,290
| New | +$3.47M |
|
111
3M
MMM
$81B
| $3.47M | 0.01% |
22,232
-30,846
| -58% | -$4.81M |
|
112
Lumentum
LITE
$9.37B
| $3.45M | 0.01% |
+42,356
| New | +$3.45M |
|
113
Ally Financial
ALLY
$12.6B
| $3.41M | 0.01% |
172,061
+60,651
| +54% | +$1.2M |
|
114
Madrigal Pharmaceuticals
MDGL
$9.7B
| $3.39M | 0.01% |
29,936
+4,637
| +18% | +$525K |
|
115
L3Harris
LHX
$51.1B
| $3.36M | 0.01% |
19,808
+9,235
| +87% | +$1.57M |
|
116
MongoDB
MDB
$25.5B
| $3.31M | 0.01% |
14,622
-5,388
| -27% | -$1.22M |
|
117
Darden Restaurants
DRI
$24.3B
| $3.27M | 0.01% |
43,213
+520
| +1% | +$39.4K |
|
118
SPDR Euro Stoxx 50 ETF
FEZ
$4.5B
| $3.27M | 0.01% |
92,046
+66,782
| +264% | +$2.37M |
|
119
Fiserv
FI
$74.3B
| $3.23M | 0.01% |
33,111
+9,053
| +38% | +$884K |
|
120
AstraZeneca
AZN
$255B
| $3.21M | 0.01% |
60,767
+55,177
| +987% | +$2.92M |
|
|
MOMO
121
Hello Group
MOMO
$1.33B
| $3.15M | 0.01% |
180,411
+119,466
| +196% | +$2.09M |
|
122
Corpay
CPAY
$22.6B
| $3.14M | 0.01% |
12,498
+339
| +3% | +$85.3K |
|
123
BioMarin Pharmaceuticals
BMRN
$11.3B
| $3.11M | 0.01% |
25,250
+4,773
| +23% | +$589K |
|
|
ZEN
124
DELISTED
ZENDESK INC
ZEN
| $3.02M | ﹤0.01% |
34,085
+31,892
| +1,454% | +$2.82M |
|
125
Bilibili
BILI
$9.2B
| $2.98M | ﹤0.01% |
64,407
-32,576
| -34% | -$1.51M |
|