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 | |
|---|---|---|---|---|---|---|
526
Pilgrim's Pride
PPC
$10.3B
| $307K | 0.01% |
+12,496
| New | +$307K |
|
527
Insperity
NSP
$1.93B
| $304K | 0.01% |
4,377
+1
| +0% | +$69 |
|
528
Lifecore Biomedical
LFCR
$262M
| $302K | 0.01% |
23,176
+23,020
| +14,756% | +$300K |
|
529
SK Telecom
SKM
$8.33B
| $302K | 0.01% |
+7,602
| New | +$302K |
|
|
RAD
530
DELISTED
Rite Aid Corporation
RAD
| $302K | 0.01% |
8,991
+8,524
| +1,825% | +$286K |
|
531
Abercrombie & Fitch
ANF
$4.54B
| $293K | 0.01% |
12,117
-9,244
| -43% | -$224K |
|
532
Digital Realty Trust
DLR
$59.3B
| $292K | 0.01% |
+2,780
| New | +$292K |
|
533
Karyopharm Therapeutics
KPTI
$53.8M
| $292K | 0.01% |
1,454
+1,011
| +228% | +$203K |
|
534
Nexstar Media Group
NXST
$5.98B
| $290K | 0.01% |
4,369
-3,353
| -43% | -$223K |
|
|
ACOR
535
DELISTED
Acorda Therapeutics, Inc.
ACOR
| $288K | 0.01% |
102
+85
| +500% | +$240K |
|
536
Fate Therapeutics
FATE
$115M
| $287K | 0.01% |
29,462
+25,468
| +638% | +$248K |
|
537
The Greenbrier Companies
GBX
$1.42B
| $287K | 0.01% |
5,731
-4,407
| -43% | -$221K |
|
|
LAYN
538
DELISTED
Layne Christensen Co
LAYN
| $287K | 0.01% |
+19,294
| New | +$287K |
|
539
Landstar System
LSTR
$4.5B
| $286K | 0.01% |
+2,616
| New | +$286K |
|
540
ProShares VIX Mid-Term Futures ETF
VIXM
$41.2M
| $282K | 0.01% |
10,671
+9,769
| +1,083% | +$258K |
|
541
Alcoa
AA
$8.01B
| $281K | 0.01% |
6,265
-5,909
| -49% | -$265K |
|
542
Valvoline
VVV
$5B
| $281K | 0.01% |
12,703
-1,041
| -8% | -$23K |
|
543
Pitney Bowes
PBI
$1.96B
| $280K | 0.01% |
25,800
+15,588
| +153% | +$169K |
|
|
GCI
544
DELISTED
Gannett Co., Inc
GCI
| $280K | 0.01% |
28,127
+3,971
| +16% | +$39.5K |
|
|
SYNH
545
DELISTED
Syneos Health, Inc. Class A Common Stock
SYNH
| $279K | 0.01% |
+7,884
| New | +$279K |
|
546
Alerian MLP ETF
AMLP
$10.5B
| $278K | 0.01% |
5,949
+2,254
| +61% | +$105K |
|
547
Nabors Industries
NBR
$619M
| $272K | 0.01% |
781
+115
| +17% | +$40.1K |
|
548
JetBlue
JBLU
$1.85B
| $271K | 0.01% |
13,341
-32,464
| -71% | -$659K |
|
549
LGI Homes
LGIH
$1.41B
| $271K | 0.01% |
3,841
+1,675
| +77% | +$118K |
|
550
Pan American Silver
PAAS
$15.3B
| $270K | 0.01% |
16,748
+1
| +0% | +$16 |
|