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 | |
|---|---|---|---|---|---|---|
|
FIT
801
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $127K | ﹤0.01% |
29,047
+11,406
| +65% | +$49.9K |
|
|
AMAG
802
DELISTED
AMAG Pharmaceuticals, Inc.
AMAG
| $127K | ﹤0.01% |
12,760
+5,360
| +72% | +$53.3K |
|
803
Asbury Automotive
ABG
$4.91B
| $126K | ﹤0.01% |
+1,496
| New | +$126K |
|
804
Materion
MTRN
$2.33B
| $126K | ﹤0.01% |
1,872
+1,483
| +381% | +$99.8K |
|
805
Jefferies Financial Group
JEF
$13.9B
| $125K | ﹤0.01% |
+7,266
| New | +$125K |
|
806
Teck Resources
TECK
$20.1B
| $125K | ﹤0.01% |
5,455
-56,210
| -91% | -$1.29M |
|
|
XHR
807
Xenia Hotels & Resorts
XHR
$1.4B
| $125K | ﹤0.01% |
6,020
+4,790
| +389% | +$99.5K |
|
|
FLXN
808
DELISTED
Flexion Therapeutics, Inc.
FLXN
| $125K | ﹤0.01% |
10,237
-13,352
| -57% | -$163K |
|
809
Angi Inc
ANGI
$783M
| $124K | ﹤0.01% |
954
-67
| -7% | -$8.71K |
|
810
Turning Point Brands
TPB
$1.83B
| $124K | ﹤0.01% |
2,551
+164
| +7% | +$7.97K |
|
811
Medifast
MED
$152M
| $123K | ﹤0.01% |
959
-268
| -22% | -$34.4K |
|
812
Park Hotels & Resorts
PK
$2.39B
| $123K | ﹤0.01% |
4,466
+3,150
| +239% | +$86.8K |
|
|
SAFE
813
DELISTED
Safehold Inc.
SAFE
| $123K | ﹤0.01% |
+4,073
| New | +$123K |
|
814
Ingredion
INGR
$8.12B
| $122K | ﹤0.01% |
+1,490
| New | +$122K |
|
815
MacroGenics
MGNX
$102M
| $122K | ﹤0.01% |
7,244
-4,344
| -37% | -$73.2K |
|
816
PENN Entertainment
PENN
$2.86B
| $122K | ﹤0.01% |
6,351
-4,151
| -40% | -$79.7K |
|
|
INFN
817
DELISTED
Infinera Corporation Common Stock
INFN
| $122K | ﹤0.01% |
42,263
-32,414
| -43% | -$93.6K |
|
|
INXN
818
DELISTED
Interxion Holding N.V.
INXN
| $122K | ﹤0.01% |
+1,611
| New | +$122K |
|
|
CDMO
819
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $121K | ﹤0.01% |
21,729
-515
| -2% | -$2.87K |
|
|
LFC
820
DELISTED
China Life Insurance Company Ltd.
LFC
| $121K | ﹤0.01% |
9,798
-13,425
| -58% | -$166K |
|
|
HEES
821
DELISTED
H&E Equipment Services
HEES
| $118K | ﹤0.01% |
4,084
+3,760
| +1,160% | +$109K |
|
822
ManpowerGroup
MAN
$1.83B
| $118K | ﹤0.01% |
+1,230
| New | +$118K |
|
823
Century Aluminum
CENX
$2.38B
| $117K | ﹤0.01% |
17,069
+11,396
| +201% | +$78.1K |
|
824
Vishay Intertechnology
VSH
$2.08B
| $117K | ﹤0.01% |
7,127
+4,585
| +180% | +$75.3K |
|
|
WRI
825
DELISTED
Weingarten Realty Investors
WRI
| $117K | ﹤0.01% |
4,292
+109
| +3% | +$2.97K |
|