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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
JOY
626
DELISTED
Joy Global Inc
JOY
| $269K | 0.01% |
9,538
-17,391
| -65% | -$490K |
|
627
Cognex
CGNX
$7.76B
| $268K | 0.01% |
+6,402
| New | +$268K |
|
628
Yelp
YELP
$2.03B
| $268K | 0.01% |
+8,184
| New | +$268K |
|
629
Metallus
MTUS
$698M
| $268K | 0.01% |
+14,179
| New | +$268K |
|
630
Virtu Financial
VIRT
$2.98B
| $267K | 0.01% |
15,727
+6,796
| +76% | +$115K |
|
631
Workday
WDAY
$62.4B
| $267K | 0.01% |
+3,207
| New | +$267K |
|
|
MODN
632
DELISTED
MODEL N, INC.
MODN
| $264K | 0.01% |
25,280
+12,192
| +93% | +$127K |
|
|
DD
633
DELISTED
Du Pont De Nemours E I
DD
| $264K | 0.01% |
+3,287
| New | +$264K |
|
634
Magna International
MGA
$13.3B
| $263K | 0.01% |
+6,104
| New | +$263K |
|
|
WDR
635
DELISTED
Waddell & Reed Financial, Inc.
WDR
| $262K | 0.01% |
15,434
+3,655
| +31% | +$62K |
|
|
PAY
636
DELISTED
Verifone Systems Inc
PAY
| $262K | 0.01% |
+14,030
| New | +$262K |
|
637
Restaurant Brands International
QSR
$20.6B
| $260K | 0.01% |
4,679
-10,329
| -69% | -$574K |
|
|
ANSS
638
DELISTED
Ansys
ANSS
| $258K | 0.01% |
+2,420
| New | +$258K |
|
639
Invesco
IVZ
$10.1B
| $258K | 0.01% |
+8,451
| New | +$258K |
|
640
SunCoke Energy
SXC
$673M
| $255K | 0.01% |
+28,500
| New | +$255K |
|
|
CPN
641
DELISTED
Calpine Corporation
CPN
| $254K | 0.01% |
23,030
-49,599
| -68% | -$547K |
|
642
BioMarin Pharmaceuticals
BMRN
$10.6B
| $252K | 0.01% |
2,871
-12,771
| -82% | -$1.12M |
|
643
Fabrinet
FN
$13.5B
| $252K | 0.01% |
+6,006
| New | +$252K |
|
644
Buckle
BKE
$3.13B
| $251K | 0.01% |
+13,498
| New | +$251K |
|
645
Quad
QUAD
$339M
| $251K | 0.01% |
9,970
+2,716
| +37% | +$68.4K |
|
|
AGU
646
DELISTED
Agrium
AGU
| $251K | 0.01% |
2,630
+1,710
| +186% | +$163K |
|
647
The GEO Group
GEO
$3.11B
| $250K | 0.01% |
+8,100
| New | +$250K |
|
648
iRobot
IRBT
$138M
| $250K | 0.01% |
+3,781
| New | +$250K |
|
649
Churchill Downs
CHDN
$6.76B
| $248K | 0.01% |
9,372
-4,482
| -32% | -$119K |
|
650
Comfort Systems
FIX
$28.2B
| $248K | 0.01% |
+6,775
| New | +$248K |
|