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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
LendingClub
LC
$1.91B
| $55K | ﹤0.01% |
3,412
-490
| -13% | -$7.9K |
|
1027
TEGNA Inc
TGNA
$3.39B
| $55K | ﹤0.01% |
+3,657
| New | +$55K |
|
1028
W&T Offshore
WTI
$257M
| $55K | ﹤0.01% |
+11,104
| New | +$55K |
|
1029
Real Estate Select Sector SPDR Fund
XLRE
$7.81B
| $55K | ﹤0.01% |
1,512
-3,217
| -68% | -$117K |
|
1030
Artivion
AORT
$1.92B
| $54K | ﹤0.01% |
+1,836
| New | +$54K |
|
1031
Tenaris
TS
$18.7B
| $54K | ﹤0.01% |
2,082
-31,617
| -94% | -$820K |
|
|
WPRT
1032
Westport Fuel Systems
WPRT
$40.8M
| $54K | ﹤0.01% |
2,021
+2,011
| +20,110% | +$53.7K |
|
1033
Huron Consulting
HURN
$2.44B
| $53K | ﹤0.01% |
1,071
-67
| -6% | -$3.32K |
|
1034
Intrepid Potash
IPI
$389M
| $53K | ﹤0.01% |
1,598
-4,249
| -73% | -$141K |
|
1035
Invesco KBW Bank ETF
KBWB
$4.98B
| $53K | ﹤0.01% |
+1,065
| New | +$53K |
|
1036
Uranium Energy
UEC
$5.27B
| $53K | ﹤0.01% |
38,841
+27,558
| +244% | +$37.6K |
|
|
GLUU
1037
DELISTED
Glu Mobile Inc.
GLUU
| $53K | ﹤0.01% |
7,434
-12,241
| -62% | -$87.3K |
|
|
QIWI
1038
DELISTED
QIWI PLC
QIWI
| $53K | ﹤0.01% |
2,759
-15,381
| -85% | -$295K |
|
|
CAF
1039
Morgan Stanley China A Share Fund
CAF
$267M
| $52K | ﹤0.01% |
2,420
+133
| +6% | +$2.86K |
|
1040
Kosmos Energy
KOS
$799M
| $52K | ﹤0.01% |
+8,312
| New | +$52K |
|
1041
Telefonica
TEF
$30.3B
| $52K | ﹤0.01% |
7,902
+5,693
| +258% | +$37.5K |
|
1042
Interface
TILE
$1.66B
| $52K | ﹤0.01% |
3,432
+797
| +30% | +$12.1K |
|
|
STML
1043
DELISTED
Stemline Therapeutics, Inc.
STML
| $52K | ﹤0.01% |
3,438
-6,729
| -66% | -$102K |
|
|
PETX
1044
DELISTED
Aratana Therapeutics, Inc.
PETX
| $52K | ﹤0.01% |
10,159
-13,315
| -57% | -$68.2K |
|
|
MBT
1045
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $52K | ﹤0.01% |
5,647
+2,566
| +83% | +$23.6K |
|
|
TCF
1046
DELISTED
TCF Financial Corporation
TCF
| $52K | ﹤0.01% |
2,509
-3,529
| -58% | -$73.1K |
|
1047
InterDigital
IDCC
$8.33B
| $51K | ﹤0.01% |
+802
| New | +$51K |
|
1048
Bank OZK
OZK
$5.88B
| $51K | ﹤0.01% |
1,697
-38,726
| -96% | -$1.16M |
|
|
CVET
1049
DELISTED
Covetrus, Inc. Common Stock
CVET
| $51K | ﹤0.01% |
2,113
-1,426
| -40% | -$34.4K |
|
|
WIFI
1050
DELISTED
Boingo Wireless, Inc.
WIFI
| $51K | ﹤0.01% |
2,855
+2,269
| +387% | +$40.5K |
|