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 |
Amazon
AMZN
|
$102M |
| 2 |
TSMC
TSM
|
$29.6M |
| 3 |
JPMorgan Chase
JPM
|
$21.9M |
| 4 |
Boeing
BA
|
$18.8M |
| 5 |
Target
TGT
|
$13.5M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$94.2M |
| 2 |
Tesla
TSLA
|
$91.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
$81.5M |
| 4 |
NVIDIA
NVDA
|
$60M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Sector Composition
| 1 | Consumer Discretionary | 21.73% |
| 2 | Technology | 16.48% |
| 3 | Healthcare | 9.06% |
| 4 | Financials | 8.3% |
| 5 | Communication Services | 7.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
Gen Digital
GEN
$18.2B
| $1.74M | ﹤0.01% |
83,541
+35,986
| +76% | +$750K |
|
202
Axalta
AXTA
$6.89B
| $1.74M | ﹤0.01% |
78,472
+2,013
| +3% | +$44.6K |
|
203
Cardinal Health
CAH
$35.7B
| $1.72M | ﹤0.01% |
36,692
+14,045
| +62% | +$659K |
|
|
KL
204
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $1.71M | ﹤0.01% |
35,192
+5,082
| +17% | +$248K |
|
205
Teva Pharmaceuticals
TEVA
$21.7B
| $1.71M | ﹤0.01% |
189,434
+87,259
| +85% | +$786K |
|
206
Global X Silver Miners ETF NEW
SIL
$2.92B
| $1.7M | ﹤0.01% |
39,207
+16,050
| +69% | +$696K |
|
207
Medtronic
MDT
$119B
| $1.7M | ﹤0.01% |
16,323
-27,700
| -63% | -$2.88M |
|
|
NUAN
208
DELISTED
Nuance Communications, Inc.
NUAN
| $1.69M | ﹤0.01% |
50,992
-2,703
| -5% | -$89.7K |
|
209
ProShares UltraShort S&P500
SDS
$442M
| $1.69M | ﹤0.01% |
+21,190
| New | +$1.69M |
|
210
Copart
CPRT
$47B
| $1.69M | ﹤0.01% |
64,216
+36,116
| +129% | +$949K |
|
211
Booking.com
BKNG
$178B
| $1.67M | ﹤0.01% |
978
+71
| +8% | +$121K |
|
212
Ally Financial
ALLY
$12.7B
| $1.66M | ﹤0.01% |
66,039
-106,022
| -62% | -$2.66M |
|
|
PRNB
213
DELISTED
Principia Biopharma Inc. Common Stock
PRNB
| $1.63M | ﹤0.01% |
+16,330
| New | +$1.63M |
|
214
ARK Innovation ETF
ARKK
$7.49B
| $1.62M | ﹤0.01% |
+17,649
| New | +$1.62M |
|
|
PLAN
215
DELISTED
Anaplan, Inc.
PLAN
| $1.62M | ﹤0.01% |
25,887
-18,131
| -41% | -$1.13M |
|
216
Morgan Stanley
MS
$236B
| $1.6M | ﹤0.01% |
33,194
-168,315
| -84% | -$8.13M |
|
|
IPHI
217
DELISTED
INPHI CORPORATION
IPHI
| $1.6M | ﹤0.01% |
14,294
+12,283
| +611% | +$1.38M |
|
218
D.R. Horton
DHI
$54.2B
| $1.59M | ﹤0.01% |
21,085
+19,858
| +1,618% | +$1.5M |
|
219
Cummins
CMI
$55.1B
| $1.56M | ﹤0.01% |
+7,379
| New | +$1.56M |
|
220
Mattel
MAT
$6.06B
| $1.55M | ﹤0.01% |
132,245
+47,885
| +57% | +$560K |
|
221
Nutanix
NTNX
$18.7B
| $1.54M | ﹤0.01% |
69,319
-29,480
| -30% | -$654K |
|
222
ProShares Ultra Bloomberg Crude Oil
UCO
$356M
| $1.54M | ﹤0.01% |
215,976
+154,476
| +251% | +$1.1M |
|
223
iShares Gold Trust
IAU
$52.6B
| $1.53M | ﹤0.01% |
42,532
-19,632
| -32% | -$706K |
|
224
Kinross Gold
KGC
$26.9B
| $1.53M | ﹤0.01% |
173,370
+159,825
| +1,180% | +$1.41M |
|
225
SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$1.85B
| $1.52M | ﹤0.01% |
36,180
-90,598
| -71% | -$3.81M |
|