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 |
Alphabet (Google) Class C
GOOG
|
$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$40.9M |
| 4 |
Apple
AAPL
|
$16.5M |
| 5 |
Visa
V
|
$12M |
Top Sells
| 1 |
Amazon
AMZN
|
$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
$33.4M |
| 4 |
Goldman Sachs
GS
|
$30.2M |
| 5 |
Boeing
BA
|
$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
AXIS Capital
AXS
$7.62B
| $669K | ﹤0.01% |
12,969
+12,402
| +2,187% | +$640K |
|
302
PagSeguro Digital
PAGS
$2.8B
| $667K | ﹤0.01% |
35,656
-5,545
| -13% | -$104K |
|
|
MLNX
303
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $667K | ﹤0.01% |
7,229
+2,772
| +62% | +$256K |
|
|
ONCE
304
DELISTED
Spark Therapeutics, Inc. Common Stock
ONCE
| $662K | ﹤0.01% |
16,932
+6,426
| +61% | +$251K |
|
|
ESV
305
DELISTED
Ensco Rowan plc
ESV
| $662K | ﹤0.01% |
+46,556
| New | +$662K |
|
|
BRSL
306
Brightstar Lottery PLC
BRSL
$3.18B
| $661K | ﹤0.01% |
45,213
-76,909
| -63% | -$1.12M |
|
307
Healthpeak Properties
DOC
$12.8B
| $659K | ﹤0.01% |
23,609
+21,048
| +822% | +$588K |
|
308
Ametek
AME
$43.3B
| $651K | ﹤0.01% |
+9,623
| New | +$651K |
|
|
NBL
309
DELISTED
Noble Energy, Inc.
NBL
| $648K | ﹤0.01% |
+34,579
| New | +$648K |
|
|
NUVA
310
DELISTED
NuVasive, Inc.
NUVA
| $647K | ﹤0.01% |
13,071
+11,502
| +733% | +$569K |
|
|
INFO
311
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $644K | ﹤0.01% |
+13,444
| New | +$644K |
|
|
CSFL
312
DELISTED
CenterState Bank Corporation Common Stock
CSFL
| $644K | ﹤0.01% |
30,646
+30,452
| +15,697% | +$640K |
|
313
iShares MSCI USA Momentum Factor ETF
MTUM
$18.2B
| $643K | ﹤0.01% |
+6,421
| New | +$643K |
|
|
AYX
314
DELISTED
Alteryx, Inc.
AYX
| $642K | ﹤0.01% |
10,809
+9,460
| +701% | +$562K |
|
|
INOV
315
DELISTED
Inovalon Holdings, Inc. Class A Common Stock
INOV
| $640K | ﹤0.01% |
+45,147
| New | +$640K |
|
|
WBT
316
DELISTED
Welbilt, Inc.
WBT
| $636K | ﹤0.01% |
+57,292
| New | +$636K |
|
317
Esperion Therapeutics
ESPR
$540M
| $634K | ﹤0.01% |
13,785
+10,128
| +277% | +$466K |
|
318
Charles Schwab
SCHW
$167B
| $633K | ﹤0.01% |
+15,261
| New | +$633K |
|
319
AMC Entertainment Holdings
AMC
$1.41B
| $632K | ﹤0.01% |
5,148
+395
| +8% | +$48.5K |
|
|
PFPT
320
DELISTED
Proofpoint, Inc.
PFPT
| $627K | ﹤0.01% |
7,482
+4,344
| +138% | +$364K |
|
321
GrafTech
EAF
$256M
| $624K | ﹤0.01% |
5,459
+1,782
| +48% | +$204K |
|
322
KraneShares CSI China Internet ETF
KWEB
$8.55B
| $623K | ﹤0.01% |
16,625
+15,332
| +1,186% | +$575K |
|
323
AstraZeneca
AZN
$253B
| $616K | ﹤0.01% |
16,236
-6,405
| -28% | -$243K |
|
324
Southwest Airlines
LUV
$16.5B
| $611K | ﹤0.01% |
+13,146
| New | +$611K |
|
325
Vanguard Real Estate ETF
VNQ
$34.7B
| $610K | ﹤0.01% |
+8,183
| New | +$610K |
|