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 | |
|---|---|---|---|---|---|---|
701
Pan American Silver
PAAS
$14.7B
| $205K | 0.01% |
11,716
-4,329
| -27% | -$75.7K |
|
702
United States Natural Gas Fund
UNG
$584M
| $203K | 0.01% |
1,684
-1,232
| -42% | -$149K |
|
|
WW
703
DELISTED
WW International
WW
| $202K | 0.01% |
+12,997
| New | +$202K |
|
704
e.l.f. Beauty
ELF
$8.26B
| $201K | 0.01% |
+7,013
| New | +$201K |
|
705
ProShares UltraPro Short 20+ Year Treasury
TTT
$22.4M
| $199K | 0.01% |
1,624
+736
| +83% | +$90.2K |
|
706
Direxion Daily Financial Bull 3x Shares
FAS
$2.83B
| $198K | 0.01% |
+4,465
| New | +$198K |
|
707
Silicon Laboratories
SLAB
$4.68B
| $198K | 0.01% |
2,696
-2,109
| -44% | -$155K |
|
708
Smith & Nephew
SNN
$16B
| $198K | 0.01% |
6,426
+4,645
| +261% | +$143K |
|
709
ProShares UltraPro Dow 30
UDOW
$737M
| $198K | 0.01% |
7,288
-19,216
| -73% | -$522K |
|
|
GMLP
710
DELISTED
Golar LNG Partners LP
GMLP
| $198K | 0.01% |
8,873
+8,704
| +5,150% | +$194K |
|
|
CPE
711
DELISTED
Callon Petroleum Company
CPE
| $197K | 0.01% |
1,502
+382
| +34% | +$50.1K |
|
|
SPLS
712
DELISTED
Staples Inc
SPLS
| $197K | 0.01% |
+22,464
| New | +$197K |
|
713
Deluxe
DLX
$900M
| $196K | 0.01% |
+2,727
| New | +$196K |
|
714
BBVA Argentina
BBAR
$1.7B
| $195K | 0.01% |
10,619
+4,351
| +69% | +$79.9K |
|
715
Coeur Mining
CDE
$10.2B
| $195K | 0.01% |
24,230
+4,651
| +24% | +$37.4K |
|
716
KRONOS Worldwide
KRO
$705M
| $195K | 0.01% |
+11,890
| New | +$195K |
|
717
Thor Industries
THO
$5.51B
| $195K | 0.01% |
2,030
+726
| +56% | +$69.7K |
|
|
CSRA
718
DELISTED
CSRA Inc.
CSRA
| $195K | 0.01% |
6,673
+6,531
| +4,599% | +$191K |
|
719
Campbell Soup
CPB
$9.93B
| $194K | 0.01% |
3,391
-1,076
| -24% | -$61.6K |
|
720
Kratos Defense & Security Solutions
KTOS
$13.2B
| $193K | 0.01% |
+24,934
| New | +$193K |
|
721
Viasat
VSAT
$4.02B
| $193K | 0.01% |
3,031
+2,829
| +1,400% | +$180K |
|
|
LGF.A
722
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $191K | 0.01% |
7,215
-6,518
| -47% | -$173K |
|
723
iShares US Broker-Dealers & Securities Exchanges ETF
IAI
$1.53B
| $189K | 0.01% |
+3,704
| New | +$189K |
|
724
StoneX
SNEX
$4.99B
| $189K | 0.01% |
+11,214
| New | +$189K |
|
725
AerCap
AER
$21.6B
| $188K | 0.01% |
+4,098
| New | +$188K |
|