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 | |
|---|---|---|---|---|---|---|
451
Apollo Global Management
APO
$76.6B
| $389K | 0.02% |
+13,142
| New | +$389K |
|
452
Ross Stores
ROST
$48.8B
| $388K | 0.02% |
4,988
+2,953
| +145% | +$230K |
|
453
Applied Optoelectronics
AAOI
$1.74B
| $387K | 0.02% |
+15,454
| New | +$387K |
|
|
SIEN
454
DELISTED
Sientra, Inc.
SIEN
| $386K | 0.02% |
3,997
+3,600
| +907% | +$348K |
|
455
Halliburton
HAL
$19.1B
| $382K | 0.02% |
8,146
-100,364
| -92% | -$4.71M |
|
456
Yum! Brands
YUM
$40.7B
| $382K | 0.02% |
+4,495
| New | +$382K |
|
457
Dropbox
DBX
$8.35B
| $381K | 0.02% |
+12,208
| New | +$381K |
|
|
PAY
458
DELISTED
Verifone Systems Inc
PAY
| $381K | 0.02% |
24,805
+9,628
| +63% | +$148K |
|
459
Insight Enterprises
NSIT
$3.9B
| $380K | 0.02% |
10,901
+10,513
| +2,710% | +$366K |
|
460
First Horizon
FHN
$11.4B
| $379K | 0.02% |
+20,171
| New | +$379K |
|
461
Coca-Cola
KO
$292B
| $379K | 0.02% |
8,732
-18,590
| -68% | -$807K |
|
462
Idexx Laboratories
IDXX
$50.8B
| $378K | 0.02% |
+1,977
| New | +$378K |
|
463
Ralph Lauren
RL
$18.9B
| $377K | 0.02% |
3,379
-9,711
| -74% | -$1.08M |
|
|
BECN
464
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $377K | 0.02% |
+7,104
| New | +$377K |
|
465
Match Group
MTCH
$9.11B
| $373K | 0.02% |
8,407
-3,076
| -27% | -$136K |
|
466
Hartford Financial Services
HIG
$36.8B
| $369K | 0.02% |
7,166
-20,585
| -74% | -$1.06M |
|
467
Wheaton Precious Metals
WPM
$47.8B
| $368K | 0.02% |
+18,113
| New | +$368K |
|
468
iShares MSCI Europe Financials ETF
EUFN
$4.41B
| $366K | 0.02% |
15,866
+8,079
| +104% | +$186K |
|
|
EMWP
469
DELISTED
Eros Media World PLC
EMWP
| $362K | 0.02% |
1,663
+1,022
| +159% | +$222K |
|
470
Norfolk Southern
NSC
$60.9B
| $360K | 0.02% |
+2,654
| New | +$360K |
|
471
BGC Group
BGC
$4.79B
| $358K | 0.02% |
+41,400
| New | +$358K |
|
|
CYOU
472
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $357K | 0.02% |
+12,801
| New | +$357K |
|
473
Middleby
MIDD
$6.98B
| $356K | 0.02% |
+2,879
| New | +$356K |
|
474
Arch Capital
ACGL
$33.5B
| $355K | 0.02% |
+12,465
| New | +$355K |
|
475
Century Communities
CCS
$1.99B
| $353K | 0.02% |
11,819
-5,209
| -31% | -$156K |
|