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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$40.9M |
| 4 |
Apple
AAPL
|
+$16.5M |
| 5 |
Visa
V
|
+$12M |
Top Sells
| 1 |
Amazon
AMZN
|
+$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
+$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$33.4M |
| 4 |
Goldman Sachs
GS
|
+$30.2M |
| 5 |
Boeing
BA
|
+$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
PS
876
DELISTED
Pluralsight, Inc. Class A Common Stock
PS
| $93K | ﹤0.01% |
3,976
+2,887
| +265% | +$67.5K |
|
|
CAI
877
DELISTED
CAI International, Inc.
CAI
| $92K | ﹤0.01% |
3,994
-1,052
| -21% | -$24.2K |
|
878
Cooper-Standard Automotive
CPS
$689M
| $91K | ﹤0.01% |
1,466
+1,366
| +1,366% | +$84.8K |
|
879
Dine Brands
DIN
$372M
| $91K | ﹤0.01% |
+1,364
| New | +$91K |
|
880
Amicus Therapeutics
FOLD
$2.47B
| $91K | ﹤0.01% |
9,524
+8,124
| +580% | +$77.6K |
|
881
Zumiez
ZUMZ
$362M
| $91K | ﹤0.01% |
4,752
-450
| -9% | -$8.62K |
|
882
Black Stone Minerals
BSM
$2.67B
| $90K | ﹤0.01% |
5,827
+5,257
| +922% | +$81.2K |
|
883
Global X MSCI Greece ETF
GREK
$307M
| $90K | ﹤0.01% |
4,377
-6,830
| -61% | -$140K |
|
884
Sonic Automotive
SAH
$2.83B
| $90K | ﹤0.01% |
+6,594
| New | +$90K |
|
885
Avnet
AVT
$4.52B
| $89K | ﹤0.01% |
+2,483
| New | +$89K |
|
886
Tenaris
TS
$18.8B
| $89K | ﹤0.01% |
+4,193
| New | +$89K |
|
887
Real Estate Select Sector SPDR Fund
XLRE
$7.84B
| $89K | ﹤0.01% |
+2,888
| New | +$89K |
|
|
ECHO
888
DELISTED
Echo Global Logistics, Inc.
ECHO
| $89K | ﹤0.01% |
+4,400
| New | +$89K |
|
|
DFRG
889
DELISTED
Del Frisco's Restaurant Group, Inc. Common Stock
DFRG
| $89K | ﹤0.01% |
12,555
+8,815
| +236% | +$62.5K |
|
|
TIER
890
DELISTED
TIER REIT, Inc.
TIER
| $89K | ﹤0.01% |
+4,357
| New | +$89K |
|
|
GMS
891
DELISTED
GMS Inc
GMS
| $88K | ﹤0.01% |
5,980
-9,840
| -62% | -$145K |
|
|
ULTI
892
DELISTED
Ultimate Software Group Inc
ULTI
| $88K | ﹤0.01% |
360
-5,662
| -94% | -$1.38M |
|
893
LG Display
LPL
$4.36B
| $87K | ﹤0.01% |
10,696
+5,136
| +92% | +$41.8K |
|
894
Pan American Silver
PAAS
$15.5B
| $87K | ﹤0.01% |
+6,005
| New | +$87K |
|
895
Copa Holdings
CPA
$4.82B
| $86K | ﹤0.01% |
+1,101
| New | +$86K |
|
896
Cantaloupe
CTLP
$792M
| $86K | ﹤0.01% |
22,337
-3,014
| -12% | -$11.6K |
|
897
SS&C Technologies
SSNC
$22B
| $86K | ﹤0.01% |
+1,925
| New | +$86K |
|
898
Titan Machinery
TITN
$466M
| $86K | ﹤0.01% |
+6,541
| New | +$86K |
|
899
Tower Semiconductor
TSEM
$7.38B
| $86K | ﹤0.01% |
5,881
+3,040
| +107% | +$44.5K |
|
900
Energy Fuels
UUUU
$2.89B
| $86K | ﹤0.01% |
30,376
+16,655
| +121% | +$47.2K |
|