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 | +$216M | |
| 2 | +$159M | |
| 3 | +$128M | |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 | +$141M | |
| 2 | +$53.1M | |
| 3 | +$45.7M | |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
Invesco CurrencyShares Japanese Yen Trust
FXY
$532M
| $2.1M | ﹤0.01% |
32,893
+24,804
|
|
||
227
TMC The Metals Company
TMC
$2.29B
| $2.1M | ﹤0.01% |
318,392
+182,038
|
|
||
228
Alexandria Real Estate Equities
ARE
$9.29B
| $2.1M | ﹤0.01% |
28,881
+26,500
|
|
||
|
WRD
229
WeRide Inc
WRD
$2.71B
| $2.08M | ﹤0.01% |
+264,481
|
|
||
230
Burlington
BURL
$18.1B
| $2.08M | ﹤0.01% |
8,959
-3,479
|
|
||
231
Rubrik
RBRK
$14.6B
| $2.08M | ﹤0.01% |
23,235
-6,896
|
|
||
232
Nutrien
NTR
$29.1B
| $2.08M | ﹤0.01% |
35,689
+34,062
|
|
||
233
Gogo Inc
GOGO
$972M
| $2.06M | ﹤0.01% |
140,722
-104,427
|
|
||
234
Nucor
NUE
$34B
| $2.06M | ﹤0.01% |
15,919
+7,860
|
|
||
235
Grab
GRAB
$23.7B
| $2.06M | ﹤0.01% |
410,123
-185,895
|
|
||
236
Invesco DB US Dollar Index Bullish Fund
UUP
$163M
| $2.05M | ﹤0.01% |
76,204
+53,555
|
|
||
237
Spotify
SPOT
$133B
| $2.05M | ﹤0.01% |
+2,667
|
|
||
238
Entegris
ENTG
$12.7B
| $2.03M | ﹤0.01% |
25,190
+20,131
|
|
||
239
iShares Russell 1000 Growth ETF
IWF
$126B
| $2.02M | ﹤0.01% |
+4,759
|
|
||
240
Dynatrace
DT
$14B
| $2.02M | ﹤0.01% |
36,511
+11,253
|
|
||
241
ProShares Ultra Silver
AGQ
$1.29B
| $2.01M | ﹤0.01% |
42,395
+40,464
|
|
||
242
PennyMac Financial
PFSI
$6.71B
| $2.01M | ﹤0.01% |
20,198
-5,133
|
|
||
243
NIO
NIO
$15.9B
| $2.01M | ﹤0.01% |
586,245
+559,415
|
|
||
244
FuboTV Inc
FUBO
$1.35B
| $2M | ﹤0.01% |
516,959
+42,886
|
|
||
245
Remitly
RELY
$2.55B
| $1.98M | ﹤0.01% |
+105,302
|
|
||
246
Whirlpool
WHR
$3.74B
| $1.97M | ﹤0.01% |
19,471
-35,841
|
|
||
247
Baxter International
BAX
$9.61B
| $1.97M | ﹤0.01% |
65,181
+14,303
|
|
||
248
Sable Offshore Corp
SOC
$637M
| $1.96M | ﹤0.01% |
89,286
-76,273
|
|
||
249
Ramaco Resources Class A
METC
$1.61B
| $1.95M | ﹤0.01% |
+148,631
|
|
||
250
BorgWarner
BWA
$9.84B
| $1.95M | ﹤0.01% |
58,292
+49,139
|
|