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 |
Invesco QQQ Trust
QQQ
|
+$41.7M |
| 2 |
Mastercard
MA
|
+$33.6M |
| 3 |
Alibaba
BABA
|
+$33.4M |
| 4 |
Apple
AAPL
|
+$27.9M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$26M |
Top Sells
| 1 |
JPMorgan Chase
JPM
|
+$60M |
| 2 |
TSMC
TSM
|
+$49.5M |
| 3 |
iShares Silver Trust
SLV
|
+$26M |
| 4 |
Amazon
AMZN
|
+$25.2M |
| 5 |
Boeing
BA
|
+$22.1M |
Sector Composition
| 1 | Consumer Discretionary | 23.12% |
| 2 | Technology | 13.05% |
| 3 | Healthcare | 11.53% |
| 4 | Industrials | 7.38% |
| 5 | Communication Services | 6.71% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
626
Textron
TXT
$14.4B
| $534K | ﹤0.01% |
+11,064
| New | +$534K |
|
627
Sun Communities
SUI
$16.1B
| $532K | ﹤0.01% |
+3,507
| New | +$532K |
|
|
PLAN
628
DELISTED
Anaplan, Inc.
PLAN
| $532K | ﹤0.01% |
7,412
-18,475
| -71% | -$1.33M |
|
629
MarketAxess Holdings
MKTX
$6.9B
| $530K | ﹤0.01% |
+929
| New | +$530K |
|
|
QVCGA
630
QVC Group, Inc. Series A Common Stock
QVCGA
$83.7M
| $530K | ﹤0.01% |
967
+852
| +741% | +$467K |
|
631
Range Resources
RRC
$8.3B
| $529K | ﹤0.01% |
78,992
+63,638
| +414% | +$426K |
|
632
Direxion Daily 20+ Year Treasury Bull 3X Shares
TMF
$5.51B
| $527K | ﹤0.01% |
+1,500
| New | +$527K |
|
633
Radware
RDWR
$1.1B
| $526K | ﹤0.01% |
18,962
-13,679
| -42% | -$379K |
|
|
PE
634
DELISTED
PARSLEY ENERGY INC
PE
| $525K | ﹤0.01% |
36,998
+3,654
| +11% | +$51.9K |
|
635
Axalta
AXTA
$6.7B
| $524K | ﹤0.01% |
18,387
-60,085
| -77% | -$1.71M |
|
|
SIX
636
DELISTED
Six Flags Entertainment Corp.
SIX
| $524K | ﹤0.01% |
15,383
-58,059
| -79% | -$1.98M |
|
637
VanEck Low Carbon Energy ETF
SMOG
$123M
| $520K | ﹤0.01% |
+3,146
| New | +$520K |
|
638
Fomento Económico Mexicano
FMX
$30.1B
| $519K | ﹤0.01% |
6,856
-5,398
| -44% | -$409K |
|
639
Match Group
MTCH
$9.12B
| $518K | ﹤0.01% |
3,430
-72,313
| -95% | -$10.9M |
|
640
Repligen
RGEN
$6.76B
| $518K | ﹤0.01% |
2,707
+2,080
| +332% | +$398K |
|
|
NOAH
641
Noah Holdings
NOAH
$787M
| $515K | ﹤0.01% |
+10,782
| New | +$515K |
|
642
Petrobras
PBR
$82.2B
| $513K | ﹤0.01% |
45,738
-135,525
| -75% | -$1.52M |
|
|
SA
643
Seabridge Gold
SA
$1.8B
| $513K | ﹤0.01% |
24,388
+10,241
| +72% | +$215K |
|
644
SoFi Technologies
SOFI
$30.6B
| $513K | ﹤0.01% |
+41,299
| New | +$513K |
|
645
TopBuild
BLD
$11.8B
| $512K | ﹤0.01% |
2,784
+2,274
| +446% | +$418K |
|
646
Cameco
CCJ
$34.6B
| $511K | ﹤0.01% |
38,198
-33,981
| -47% | -$455K |
|
647
Bally's
BALY
$487M
| $507K | ﹤0.01% |
+10,098
| New | +$507K |
|
648
Cohu
COHU
$976M
| $507K | ﹤0.01% |
13,292
+12,035
| +957% | +$459K |
|
649
eHealth
EHTH
$115M
| $505K | ﹤0.01% |
+7,154
| New | +$505K |
|
650
Tyler Technologies
TYL
$23.6B
| $502K | ﹤0.01% |
1,151
-2,999
| -72% | -$1.31M |
|