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 |
Advanced Micro Devices
AMD
|
+$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
+$10.1M |
| 3 |
NIO
NIO
|
+$7.66M |
| 4 |
Alibaba
BABA
|
+$7.54M |
| 5 |
Micron Technology
MU
|
+$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$101M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.2M |
| 3 |
Amazon
AMZN
|
+$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
+$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1301
US Global Investors
GROW
$31.7M
| $203K | ﹤0.01% |
32,844
| – | – |
|
|
CONE
1302
DELISTED
CyrusOne Inc Common Stock
CONE
| $203K | ﹤0.01% |
2,888
+100
| +4% | +$7.03K |
|
1303
Li Auto
LI
$24.6B
| $202K | ﹤0.01% |
+5,838
| New | +$202K |
|
1304
Vanguard Financials ETF
VFH
$13B
| $202K | ﹤0.01% |
2,215
| – | – |
|
|
ABMD
1305
DELISTED
Abiomed Inc
ABMD
| $201K | ﹤0.01% |
645
-423
| -40% | -$132K |
|
1306
ACV Auctions
ACVA
$1.78B
| $200K | ﹤0.01% |
8,074
-200
| -2% | -$4.95K |
|
1307
iShares US Oil Equipment & Services ETF
IEZ
$115M
| $200K | ﹤0.01% |
12,558
+700
| +6% | +$11.1K |
|
|
BCPC
1308
Balchem Corporation
BCPC
$5.14B
| $199K | ﹤0.01% |
1,501
| – | – |
|
1309
APi Group
APG
$14.8B
| $198K | ﹤0.01% |
13,782
| – | – |
|
1310
Hilton Worldwide
HLT
$65.4B
| $198K | ﹤0.01% |
1,603
+1,114
| +228% | +$138K |
|
|
TGB
1311
Taseko Mines
TGB
$1.11B
| $198K | ﹤0.01% |
96,387
| – | – |
|
1312
Compugen
CGEN
$129M
| $197K | ﹤0.01% |
24,690
-4,677
| -16% | -$37.3K |
|
1313
Churchill Downs
CHDN
$6.89B
| $197K | ﹤0.01% |
1,976
| – | – |
|
1314
IDEX
IEX
$12.4B
| $197K | ﹤0.01% |
896
| – | – |
|
1315
Invesco NASDAQ Next Gen 100 ETF
QQQJ
$689M
| $197K | ﹤0.01% |
5,734
-900
| -14% | -$30.9K |
|
1316
W.R. Berkley
WRB
$27.8B
| $197K | ﹤0.01% |
5,861
+5,850
| +53,182% | +$197K |
|
1317
United States Copper Index Fund
CPER
$222M
| $196K | ﹤0.01% |
7,545
| – | – |
|
1318
TTEC Holdings
TTEC
$179M
| $196K | ﹤0.01% |
1,917
| – | – |
|
1319
iShares Asia 50 ETF
AIA
$994M
| $195K | ﹤0.01% |
2,154
+300
| +16% | +$27.2K |
|
1320
ProShares UltraShort Financials
SKF
$9.93M
| $195K | ﹤0.01% |
2,436
| – | – |
|
1321
California Resources
CRC
$4.36B
| $194K | ﹤0.01% |
6,337
| – | – |
|
1322
InterDigital
IDCC
$8.37B
| $194K | ﹤0.01% |
2,667
-1,000
| -27% | -$72.7K |
|
1323
Quaker Houghton
KWR
$2.48B
| $194K | ﹤0.01% |
815
| – | – |
|
1324
Sleep Number
SNBR
$237M
| $194K | ﹤0.01% |
1,767
+900
| +104% | +$98.8K |
|
|
LDL
1325
DELISTED
Lydall, Inc.
LDL
| $194K | ﹤0.01% |
3,209
+200
| +7% | +$12.1K |
|