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 | |
|---|---|---|---|---|---|---|
326
Vertex Pharmaceuticals
VRTX
$102B
| $623K | 0.03% |
+3,823
| New | +$623K |
|
327
Capital One
COF
$142B
| $622K | 0.03% |
+6,497
| New | +$622K |
|
328
National Beverage
FIZZ
$3.68B
| $622K | 0.03% |
13,990
+5,142
| +58% | +$229K |
|
329
Direxion Daily Aerospace & Defense Bull 3X Shares
DFEN
$318M
| $616K | 0.03% |
+12,390
| New | +$616K |
|
330
Commault Systems
CVLT
$8.23B
| $610K | 0.03% |
10,676
+10,276
| +2,569% | +$587K |
|
331
Etsy
ETSY
$5.55B
| $609K | 0.03% |
21,704
+16,602
| +325% | +$466K |
|
332
Pure Storage
PSTG
$25.9B
| $608K | 0.03% |
30,487
-22,478
| -42% | -$448K |
|
|
MBT
333
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $608K | 0.03% |
+53,452
| New | +$608K |
|
334
NXP Semiconductors
NXPI
$56.4B
| $607K | 0.03% |
+5,195
| New | +$607K |
|
335
MBIA
MBI
$382M
| $606K | 0.03% |
+65,455
| New | +$606K |
|
|
XYZ
336
Block, Inc.
XYZ
$46B
| $606K | 0.03% |
12,337
-246,606
| -95% | -$12.1M |
|
|
S
337
DELISTED
Sprint Corporation
S
| $605K | 0.03% |
124,068
+15,366
| +14% | +$74.9K |
|
338
Main Street Capital
MAIN
$5.9B
| $604K | 0.03% |
16,375
+15,194
| +1,287% | +$560K |
|
|
CSRA
339
DELISTED
CSRA Inc.
CSRA
| $601K | 0.03% |
14,588
-6,689
| -31% | -$276K |
|
340
St. Joe Company
JOE
$2.94B
| $599K | 0.03% |
31,779
+26,661
| +521% | +$503K |
|
|
CAVM
341
DELISTED
Cavium, Inc.
CAVM
| $592K | 0.03% |
+7,462
| New | +$592K |
|
342
iShares MSCI Pacific ex Japan ETF
EPP
$1.84B
| $588K | 0.03% |
12,669
+12,512
| +7,969% | +$581K |
|
|
BHVN
343
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $588K | 0.03% |
22,855
+20,449
| +850% | +$526K |
|
|
DQ
344
Daqo New Energy
DQ
$1.86B
| $578K | 0.03% |
59,085
+8,880
| +18% | +$86.9K |
|
345
Ecopetrol
EC
$19B
| $577K | 0.03% |
+29,858
| New | +$577K |
|
|
KL
346
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $576K | 0.03% |
37,303
+14,715
| +65% | +$227K |
|
|
SGEN
347
DELISTED
Seagen Inc. Common Stock
SGEN
| $573K | 0.03% |
+10,962
| New | +$573K |
|
|
CLR
348
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $572K | 0.03% |
+9,710
| New | +$572K |
|
|
SGI
349
Somnigroup International Inc.
SGI
$17.7B
| $570K | 0.03% |
50,360
-6,992
| -12% | -$79.1K |
|
350
Markel Group
MKL
$24.4B
| $562K | 0.02% |
481
+333
| +225% | +$389K |
|