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 | |
|---|---|---|---|---|---|---|
551
Whirlpool
WHR
$5.16B
| $256K | ﹤0.01% |
2,404
-11,257
| -82% | -$1.2M |
|
552
SpartanNash
SPTN
$902M
| $255K | ﹤0.01% |
14,887
+14,377
| +2,819% | +$246K |
|
553
NewMarket
NEU
$7.81B
| $253K | ﹤0.01% |
614
-618
| -50% | -$255K |
|
554
West Pharmaceutical
WST
$18.1B
| $253K | ﹤0.01% |
2,588
+2,361
| +1,040% | +$231K |
|
555
National Beverage
FIZZ
$3.63B
| $252K | ﹤0.01% |
+7,046
| New | +$252K |
|
556
Eversource Energy
ES
$23.6B
| $250K | ﹤0.01% |
+3,848
| New | +$250K |
|
|
HRC
557
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $250K | ﹤0.01% |
2,828
+2,515
| +804% | +$222K |
|
558
ANI Pharmaceuticals
ANIP
$2.14B
| $248K | ﹤0.01% |
+5,524
| New | +$248K |
|
559
Portland General Electric
POR
$4.62B
| $248K | ﹤0.01% |
+5,413
| New | +$248K |
|
560
Shenandoah Telecom
SHEN
$731M
| $248K | ﹤0.01% |
+5,621
| New | +$248K |
|
|
MOMO
561
Hello Group
MOMO
$1.22B
| $247K | ﹤0.01% |
10,439
-40,886
| -80% | -$967K |
|
562
Regions Financial
RF
$24B
| $247K | ﹤0.01% |
18,477
-6,753
| -27% | -$90.3K |
|
563
MongoDB
MDB
$27.5B
| $246K | ﹤0.01% |
2,940
-24,571
| -89% | -$2.06M |
|
564
Repligen
RGEN
$6.76B
| $246K | ﹤0.01% |
+4,680
| New | +$246K |
|
|
DERM
565
DELISTED
Dermira, Inc.
DERM
| $246K | ﹤0.01% |
+34,318
| New | +$246K |
|
566
iShares Core S&P Total US Stock Market ETF
ITOT
$76.3B
| $245K | ﹤0.01% |
+4,318
| New | +$245K |
|
567
Safety Insurance
SAFT
$1.08B
| $245K | ﹤0.01% |
+3,004
| New | +$245K |
|
568
iShares US Transportation ETF
IYT
$603M
| $244K | ﹤0.01% |
5,932
+128
| +2% | +$5.27K |
|
569
Stratasys
SSYS
$850M
| $244K | ﹤0.01% |
13,577
+8,424
| +163% | +$151K |
|
570
Brookfield
BN
$101B
| $243K | ﹤0.01% |
+11,846
| New | +$243K |
|
571
iShares MSCI EAFE ETF
EFA
$66.8B
| $242K | ﹤0.01% |
+4,128
| New | +$242K |
|
572
NovoCure
NVCR
$1.38B
| $242K | ﹤0.01% |
7,243
-599
| -8% | -$20K |
|
573
Direxion Daily MSCI India Bull 2X Shares
INDL
$68.1M
| $239K | ﹤0.01% |
3,574
-305
| -8% | -$20.4K |
|
|
CLDR
574
DELISTED
Cloudera, Inc.
CLDR
| $237K | ﹤0.01% |
21,490
-44,856
| -68% | -$495K |
|
575
Century Aluminum
CENX
$2.12B
| $236K | ﹤0.01% |
32,417
+28,025
| +638% | +$204K |
|