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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Monro
MNRO
$519M
| $224K | ﹤0.01% |
+7,667
| New | +$224K |
|
927
Opko Health
OPK
$1.11B
| $224K | ﹤0.01% |
+148,360
| New | +$224K |
|
928
MarketAxess Holdings
MKTX
$6.91B
| $223K | ﹤0.01% |
764
-1,708
| -69% | -$499K |
|
929
NerdWallet
NRDS
$802M
| $221K | ﹤0.01% |
15,070
+13,829
| +1,114% | +$203K |
|
930
Digimarc
DMRC
$204M
| $219K | ﹤0.01% |
6,086
+228
| +4% | +$8.2K |
|
931
QuickLogic
QUIK
$92.3M
| $219K | ﹤0.01% |
+15,872
| New | +$219K |
|
932
USA Compression Partners
USAC
$2.96B
| $219K | ﹤0.01% |
+9,616
| New | +$219K |
|
933
ABM Industries
ABM
$2.8B
| $218K | ﹤0.01% |
4,870
+4,219
| +648% | +$189K |
|
934
loanDepot
LDI
$894M
| $218K | ﹤0.01% |
62,079
+60,324
| +3,437% | +$212K |
|
935
PetMed Express
PETS
$57.8M
| $218K | ﹤0.01% |
+28,865
| New | +$218K |
|
936
Companhia Siderúrgica Nacional
SID
$2.01B
| $218K | ﹤0.01% |
55,541
-113,630
| -67% | -$446K |
|
937
Shutterstock
SSTK
$742M
| $218K | ﹤0.01% |
+4,521
| New | +$218K |
|
938
ArcBest
ARCB
$1.6B
| $216K | ﹤0.01% |
1,803
-4,726
| -72% | -$566K |
|
939
Host Hotels & Resorts
HST
$12.1B
| $216K | ﹤0.01% |
11,111
-5,155
| -32% | -$100K |
|
940
Kohl's
KSS
$1.71B
| $215K | ﹤0.01% |
+7,502
| New | +$215K |
|
941
Direxion Daily MSCI Mexico Bull 3X Shares
MEXX
$21M
| $215K | ﹤0.01% |
6,129
+3,466
| +130% | +$122K |
|
942
Phinia Inc
PHIN
$2.26B
| $215K | ﹤0.01% |
7,124
+3,247
| +84% | +$98K |
|
943
PC Connection
CNXN
$1.6B
| $214K | ﹤0.01% |
+3,189
| New | +$214K |
|
|
BRAG
944
Bragg Gaming Group
BRAG
$71.3M
| $213K | ﹤0.01% |
42,219
+13,192
| +45% | +$66.6K |
|
945
Church & Dwight Co
CHD
$22.6B
| $213K | ﹤0.01% |
2,254
+1,158
| +106% | +$109K |
|
946
Topgolf Callaway Brands
MODG
$1.76B
| $213K | ﹤0.01% |
14,886
-27,287
| -65% | -$390K |
|
|
B
947
DELISTED
Barnes Group Inc.
B
| $213K | ﹤0.01% |
6,543
+5,139
| +366% | +$167K |
|
|
DCPH
948
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $213K | ﹤0.01% |
13,266
+12,158
| +1,097% | +$195K |
|
|
HUYA
949
Huya Inc
HUYA
$780M
| $212K | ﹤0.01% |
58,110
-85,166
| -59% | -$311K |
|
950
La-Z-Boy
LZB
$1.39B
| $212K | ﹤0.01% |
+5,754
| New | +$212K |
|