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 | +$73.1M | |
| 2 | +$51.8M | |
| 3 | +$46M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$41.8M |
| 5 |
Alibaba
BABA
|
+$37.1M |
Top Sells
| 1 | +$262M | |
| 2 | +$194M | |
| 3 | +$149M | |
| 4 |
Apple
AAPL
|
+$119M |
| 5 |
Amazon
AMZN
|
+$107M |
Sector Composition
| 1 | Technology | 29.67% |
| 2 | Consumer Discretionary | 10.7% |
| 3 | Healthcare | 10.12% |
| 4 | Industrials | 8.86% |
| 5 | Communication Services | 7.94% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
251
BP
BP
$112B
| $2.41M | 0.07% |
69,469
+27,432
|
|
||
252
iShares National Muni Bond ETF
MUB
$44.8B
| $2.4M | 0.07% |
+22,387
|
|
||
253
ProShares UltraShort Bitcoin ETF
SBIT
$265M
| $2.37M | 0.07% |
+53,905
|
|
||
254
Millicom
TIGO
$14.8B
| $2.33M | 0.07% |
42,040
-9,313
|
|
||
255
Equinox Gold
EQX
$9.11B
| $2.33M | 0.07% |
+165,811
|
|
||
256
Comstock Resources
CRK
$4.03B
| $2.32M | 0.07% |
100,159
+21,753
|
|
||
257
General Mills
GIS
$17.3B
| $2.32M | 0.07% |
49,795
-34,862
|
|
||
258
Direxion Daily FTSE China Bear 3X ETF
YANG
$212M
| $2.32M | 0.07% |
92,092
+52,022
|
|
||
259
SiriusXM
SIRI
$9.54B
| $2.31M | 0.07% |
115,727
+89,357
|
|
||
|
EXAS
260
DELISTED
Exact Sciences
EXAS
| $2.29M | 0.06% |
+22,521
|
|
||
261
CleanSpark
CLSK
$4.25B
| $2.28M | 0.06% |
225,526
-25,706
|
|
||
|
SLNO
262
DELISTED
Soleno Therapeutics
SLNO
| $2.27M | 0.06% |
49,108
+23,999
|
|
||
263
Kinross Gold
KGC
$34.2B
| $2.23M | 0.06% |
+79,202
|
|
||
264
Uber
UBER
$147B
| $2.23M | 0.06% |
+27,250
|
|
||
265
PayPal
PYPL
$38.1B
| $2.22M | 0.06% |
38,048
-15,545
|
|
||
266
Las Vegas Sands
LVS
$33.9B
| $2.21M | 0.06% |
33,897
+25,299
|
|
||
267
BWX Technologies
BWXT
$17.1B
| $2.2M | 0.06% |
12,710
+3,274
|
|
||
268
JetBlue
JBLU
$1.8B
| $2.19M | 0.06% |
481,326
+11,624
|
|
||
269
Comfort Systems
FIX
$65.7B
| $2.18M | 0.06% |
2,338
+1,321
|
|
||
270
Sony
SONY
$130B
| $2.16M | 0.06% |
+84,514
|
|
||
271
Best Buy
BBY
$15B
| $2.16M | 0.06% |
32,273
+27,348
|
|
||
272
Shopify
SHOP
$151B
| $2.16M | 0.06% |
13,407
+12,513
|
|
||
273
Viasat
VSAT
$9.93B
| $2.16M | 0.06% |
62,568
+22,292
|
|
||
274
iShares Russell 1000 Growth ETF
IWF
$131B
| $2.15M | 0.06% |
18,212
+3,348
|
|
||
275
Suncor Energy
SU
$76.8B
| $2.14M | 0.06% |
+48,290
|
|