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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CLGX
926
DELISTED
Corelogic, Inc.
CLGX
| $82K | ﹤0.01% |
+1,979
| New | +$82K |
|
927
Cinemark Holdings
CNK
$3.25B
| $81K | ﹤0.01% |
+2,252
| New | +$81K |
|
928
Inogen
INGN
$231M
| $81K | ﹤0.01% |
+1,218
| New | +$81K |
|
929
Medallion Financial
MFIN
$244M
| $80K | ﹤0.01% |
11,956
+8,133
| +213% | +$54.4K |
|
930
Synaptics
SYNA
$2.72B
| $80K | ﹤0.01% |
2,768
-17,408
| -86% | -$503K |
|
931
Willis Towers Watson
WTW
$33B
| $80K | ﹤0.01% |
+418
| New | +$80K |
|
|
USX
932
DELISTED
U.S. Xpress Enterprises, Inc. Class A Common Stock
USX
| $80K | ﹤0.01% |
15,754
-2,758
| -15% | -$14K |
|
933
Eagle Bancorp
EGBN
$615M
| $79K | ﹤0.01% |
1,474
-240
| -14% | -$12.9K |
|
934
Hudbay
HBM
$5.35B
| $79K | ﹤0.01% |
14,663
-3,213
| -18% | -$17.3K |
|
935
Tennant Co
TNC
$1.5B
| $79K | ﹤0.01% |
+1,300
| New | +$79K |
|
936
Vital Energy
VTLE
$635M
| $79K | ﹤0.01% |
+1,371
| New | +$79K |
|
937
O-I Glass
OI
$1.99B
| $78K | ﹤0.01% |
+4,532
| New | +$78K |
|
|
PRTY
938
DELISTED
Party City Holdco Inc.
PRTY
| $78K | ﹤0.01% |
+10,721
| New | +$78K |
|
939
Alamos Gold
AGI
$13.9B
| $77K | ﹤0.01% |
12,736
-37,669
| -75% | -$228K |
|
940
Direxion Daily Semiconductor Bear 3X Shares
SOXS
$1.18B
| $77K | ﹤0.01% |
+1
| New | +$77K |
|
941
Camtek
CAMT
$3.98B
| $76K | ﹤0.01% |
+9,021
| New | +$76K |
|
942
Noodles & Co
NDLS
$30.7M
| $76K | ﹤0.01% |
9,696
-7,189
| -43% | -$56.3K |
|
943
Regenxbio
RGNX
$465M
| $76K | ﹤0.01% |
+1,484
| New | +$76K |
|
944
Raymond James Financial
RJF
$33.9B
| $76K | ﹤0.01% |
+1,359
| New | +$76K |
|
945
CEL-SCI Corp
CVM
$70.5M
| $75K | ﹤0.01% |
+299
| New | +$75K |
|
946
Revvity
RVTY
$9.62B
| $75K | ﹤0.01% |
+782
| New | +$75K |
|
|
MNTV
947
DELISTED
Momentive Global Inc. Common Stock
MNTV
| $75K | ﹤0.01% |
4,565
-18,538
| -80% | -$305K |
|
|
FM
948
DELISTED
iShares Frontier and Select EM ETF
FM
| $75K | ﹤0.01% |
2,565
-754
| -23% | -$22K |
|
949
Lattice Semiconductor
LSCC
$8.82B
| $74K | ﹤0.01% |
5,139
+2,925
| +132% | +$42.1K |
|
|
GASL
950
DELISTED
Direxion Daily Natural Gas Related Bull 3X Shares
GASL
| $74K | ﹤0.01% |
34
-1
| -3% | -$2.18K |
|