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 | |
|---|---|---|---|---|---|---|
251
First Trust Dow Jones Internet Index Fund ETF
FDN
$7.36B
| $810K | 0.04% |
6,729
+3,974
| +144% | +$478K |
|
252
Atlassian
TEAM
$45.2B
| $807K | 0.04% |
+14,985
| New | +$807K |
|
|
ZEN
253
DELISTED
ZENDESK INC
ZEN
| $804K | 0.04% |
16,804
+10,742
| +177% | +$514K |
|
|
VIAB
254
DELISTED
Viacom Inc. Class B
VIAB
| $804K | 0.04% |
25,903
+16,381
| +172% | +$508K |
|
255
Realty Income
O
$53.7B
| $802K | 0.04% |
+16,001
| New | +$802K |
|
|
MIC
256
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $802K | 0.04% |
+21,720
| New | +$802K |
|
257
Targa Resources
TRGP
$34.5B
| $800K | 0.04% |
18,196
+5,632
| +45% | +$248K |
|
258
Axalta
AXTA
$6.97B
| $798K | 0.04% |
+26,442
| New | +$798K |
|
259
D.R. Horton
DHI
$55B
| $795K | 0.04% |
+18,149
| New | +$795K |
|
260
Mid-America Apartment Communities
MAA
$16.8B
| $795K | 0.04% |
8,716
+2,765
| +46% | +$252K |
|
261
Varonis Systems
VRNS
$6.43B
| $793K | 0.03% |
39,363
+38,790
| +6,770% | +$781K |
|
|
SIVB
262
DELISTED
SVB Financial Group
SIVB
| $793K | 0.03% |
3,306
+1,703
| +106% | +$408K |
|
|
WBC
263
DELISTED
WABCO HOLDINGS INC.
WBC
| $786K | 0.03% |
+5,875
| New | +$786K |
|
264
Iovance Biotherapeutics
IOVA
$868M
| $779K | 0.03% |
+46,119
| New | +$779K |
|
265
KB Home
KBH
$4.62B
| $779K | 0.03% |
27,386
+21,227
| +345% | +$604K |
|
266
Under Armour Class C
UA
$2.11B
| $779K | 0.03% |
54,331
-7,574
| -12% | -$109K |
|
267
Direxion Daily Gold Miners Index Bull 2X Shares
NUGT
$867M
| $775K | 0.03% |
+6,358
| New | +$775K |
|
268
Galicia Financial Group
GGAL
$5.01B
| $770K | 0.03% |
11,715
-684
| -6% | -$45K |
|
|
SVU
269
DELISTED
SUPERVALU Inc.
SVU
| $767K | 0.03% |
+50,362
| New | +$767K |
|
270
Assurant
AIZ
$10.7B
| $762K | 0.03% |
8,344
+7,626
| +1,062% | +$696K |
|
271
Schwab US Large- Cap ETF
SCHX
$59.2B
| $762K | 0.03% |
72,486
+14,886
| +26% | +$156K |
|
272
Utilities Select Sector SPDR Fund
XLU
$20.5B
| $760K | 0.03% |
15,045
-33,828
| -69% | -$1.71M |
|
273
Regency Centers
REG
$13.2B
| $759K | 0.03% |
+12,884
| New | +$759K |
|
274
AerCap
AER
$22B
| $757K | 0.03% |
14,936
+6,879
| +85% | +$349K |
|
|
KEM
275
DELISTED
KEMET Corporation
KEM
| $757K | 0.03% |
+41,808
| New | +$757K |
|