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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CALL
701
DELISTED
magicJack VocalTec Ltd
CALL
| $170K | 0.01% |
20,354
-2,500
| -11% | -$20.9K |
|
702
Prologis
PLD
$105B
| $169K | 0.01% |
+2,697
| New | +$169K |
|
|
EPAY
703
DELISTED
Bottomline Technologies Inc
EPAY
| $169K | 0.01% |
4,383
-5,468
| -56% | -$211K |
|
|
DISCK
704
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $169K | 0.01% |
+8,671
| New | +$169K |
|
|
DM
705
DELISTED
Dominion Energy Midstream Ptr LP
DM
| $169K | 0.01% |
11,010
+9,987
| +976% | +$153K |
|
706
Brown & Brown
BRO
$30.9B
| $168K | 0.01% |
6,641
+2,687
| +68% | +$68K |
|
|
STML
707
DELISTED
Stemline Therapeutics, Inc.
STML
| $168K | 0.01% |
10,994
+2,400
| +28% | +$36.7K |
|
708
Bank of Hawaii
BOH
$2.71B
| $167K | 0.01% |
2,011
+1,640
| +442% | +$136K |
|
709
Encompass Health
EHC
$12.7B
| $167K | 0.01% |
+3,682
| New | +$167K |
|
710
Pediatrix Medical
MD
$1.46B
| $167K | 0.01% |
3,008
-2,744
| -48% | -$152K |
|
|
NEWR
711
DELISTED
New Relic, Inc.
NEWR
| $167K | 0.01% |
+2,264
| New | +$167K |
|
|
TWO
712
Two Harbors Investment
TWO
$1.06B
| $166K | 0.01% |
2,709
+1,221
| +82% | +$74.8K |
|
|
CPL
713
DELISTED
CPFL Energia S.A.
CPL
| $166K | 0.01% |
11,085
+8,037
| +264% | +$120K |
|
714
Park Hotels & Resorts
PK
$2.41B
| $165K | 0.01% |
6,126
+3,596
| +142% | +$96.9K |
|
|
PACW
715
DELISTED
PacWest Bancorp
PACW
| $165K | 0.01% |
3,336
+2,738
| +458% | +$135K |
|
716
Brink's
BCO
$4.83B
| $163K | 0.01% |
+2,292
| New | +$163K |
|
717
Spok Holdings
SPOK
$359M
| $163K | 0.01% |
10,961
+1,769
| +19% | +$26.3K |
|
718
Gaming and Leisure Properties
GLPI
$13.6B
| $162K | 0.01% |
4,859
-14,230
| -75% | -$474K |
|
719
Rayonier Advanced Materials
RYAM
$408M
| $162K | 0.01% |
+7,569
| New | +$162K |
|
720
ProShares Ultra Russell2000
UWM
$390M
| $162K | 0.01% |
+4,686
| New | +$162K |
|
721
Vodafone
VOD
$28.4B
| $162K | 0.01% |
+5,849
| New | +$162K |
|
722
Verint Systems
VRNT
$1.23B
| $162K | 0.01% |
7,510
+4,897
| +187% | +$106K |
|
|
PGNX
723
DELISTED
Progenics Pharmaceuticals Inc
PGNX
| $162K | 0.01% |
21,754
+6,044
| +38% | +$45K |
|
724
Apogee Enterprises
APOG
$922M
| $161K | 0.01% |
3,717
-5,713
| -61% | -$247K |
|
|
SMC
725
Summit Midstream Corporation
SMC
$278M
| $161K | 0.01% |
766
+688
| +882% | +$145K |
|