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 | +$234M | |
| 2 | +$97.5M | |
| 3 | +$96.8M | |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| 1 | +$129M | |
| 2 | +$92.9M | |
| 3 | +$82.9M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| 1 | Technology | 34.01% |
| 2 | Consumer Discretionary | 12.8% |
| 3 | Healthcare | 10.63% |
| 4 | Financials | 7.04% |
| 5 | Communication Services | 4.24% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
GSK
GSK
$119B
| $3.08M | 0.07% |
71,404
-64,191
|
|
||
202
Robinhood
HOOD
$68.3B
| $3.07M | 0.07% |
21,447
-279,662
|
|
||
203
McCormick & Company Non-Voting
MKC
$19.1B
| $3.05M | 0.07% |
45,527
+30,800
|
|
||
|
JMIA
204
Jumia Technologies
JMIA
$1.01B
| $3.04M | 0.07% |
261,948
+219,760
|
|
||
205
S&P Global
SPGI
$132B
| $3.04M | 0.07% |
+6,245
|
|
||
|
ARR
206
Armour Residential REIT
ARR
$2.01B
| $3.01M | 0.07% |
201,402
+153,631
|
|
||
207
Cedar Fair
FUN
$1.73B
| $3M | 0.07% |
132,216
+128,185
|
|
||
208
TKO Group
TKO
$17.7B
| $2.98M | 0.07% |
14,753
-19,343
|
|
||
209
HubSpot
HUBS
$14B
| $2.97M | 0.07% |
6,350
+3,222
|
|
||
210
Direxion Daily AAPL Bull 2X Shares
AAPU
$152M
| $2.96M | 0.07% |
91,751
+63,427
|
|
||
211
Dynatrace
DT
$10.7B
| $2.94M | 0.06% |
60,707
+24,196
|
|
||
212
ACM Research
ACMR
$3.61B
| $2.94M | 0.06% |
75,018
-20,692
|
|
||
|
WRD
213
WeRide Inc
WRD
$2.39B
| $2.92M | 0.06% |
294,782
+30,301
|
|
||
214
Alexandria Real Estate Equities
ARE
$9.37B
| $2.9M | 0.06% |
34,852
+5,971
|
|
||
215
Builders FirstSource
BLDR
$11.5B
| $2.9M | 0.06% |
+23,940
|
|
||
216
Goodyear
GT
$2.36B
| $2.9M | 0.06% |
387,640
+266,488
|
|
||
217
NexGen Energy
NXE
$8.37B
| $2.88M | 0.06% |
321,798
+41,627
|
|
||
218
BILL Holdings
BILL
$4.4B
| $2.87M | 0.06% |
+54,187
|
|
||
219
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$25.6B
| $2.86M | 0.06% |
4,803
+3,213
|
|
||
220
TMC The Metals Company
TMC
$2.59B
| $2.86M | 0.06% |
448,616
+130,224
|
|
||
221
SGHC Ltd
SGHC
$5.41B
| $2.86M | 0.06% |
216,424
+185,814
|
|
||
222
Mobileye
MBLY
$7.12B
| $2.85M | 0.06% |
202,039
+188,711
|
|
||
223
Resideo Technologies
REZI
$5.79B
| $2.83M | 0.06% |
+65,677
|
|
||
224
Cleveland-Cliffs
CLF
$6.08B
| $2.83M | 0.06% |
232,105
+171,782
|
|
||
225
Polaris
PII
$3.44B
| $2.82M | 0.06% |
48,509
+7,935
|
|