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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.6B
| $793K | 0.05% |
9,918
+226
| +2% | +$18.1K |
|
202
iShares MSCI South Africa ETF
EZA
$424M
| $789K | 0.05% |
+14,083
| New | +$789K |
|
203
Honeywell
HON
$136B
| $788K | 0.05% |
+7,091
| New | +$788K |
|
204
Emcor
EME
$27.7B
| $787K | 0.05% |
+13,203
| New | +$787K |
|
|
HZNP
205
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $787K | 0.05% |
43,409
-19,882
| -31% | -$360K |
|
|
XLNX
206
DELISTED
Xilinx Inc
XLNX
| $786K | 0.05% |
14,476
-27,179
| -65% | -$1.48M |
|
207
FirstEnergy
FE
$25B
| $768K | 0.05% |
23,233
+1,470
| +7% | +$48.6K |
|
208
Applied Materials
AMAT
$127B
| $766K | 0.05% |
25,422
-44,765
| -64% | -$1.35M |
|
209
Terex
TEX
$3.45B
| $762K | 0.05% |
30,026
+25,889
| +626% | +$657K |
|
210
Illumina
ILMN
$15.5B
| $758K | 0.05% |
+4,290
| New | +$758K |
|
|
AERI
211
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $754K | 0.05% |
19,988
+19,477
| +3,812% | +$735K |
|
|
AHGP
212
DELISTED
Alliance Holdings GP,L.P.
AHGP
| $749K | 0.05% |
28,757
+16,007
| +126% | +$417K |
|
213
PTC
PTC
$25.4B
| $740K | 0.05% |
16,714
+6,084
| +57% | +$269K |
|
214
AMC Networks
AMCX
$332M
| $734K | 0.05% |
+14,172
| New | +$734K |
|
215
Ball Corp
BALL
$13.8B
| $731K | 0.05% |
17,856
-14,506
| -45% | -$594K |
|
216
Equity Residential
EQR
$25.4B
| $731K | 0.05% |
+11,365
| New | +$731K |
|
217
Vertex Pharmaceuticals
VRTX
$101B
| $729K | 0.05% |
8,368
+4,449
| +114% | +$388K |
|
218
TAL Education Group
TAL
$6.23B
| $728K | 0.05% |
+61,704
| New | +$728K |
|
|
WFM
219
DELISTED
Whole Foods Market Inc
WFM
| $715K | 0.05% |
25,252
-24,813
| -50% | -$703K |
|
220
American Eagle Outfitters
AEO
$3.12B
| $712K | 0.05% |
39,916
+22,034
| +123% | +$393K |
|
221
America Movil
AMX
$59.5B
| $710K | 0.05% |
62,081
-21,115
| -25% | -$241K |
|
222
Acadia Pharmaceuticals
ACAD
$4.26B
| $709K | 0.05% |
22,315
-1,775
| -7% | -$56.4K |
|
|
IM
223
DELISTED
Ingram Micro
IM
| $706K | 0.05% |
19,816
-27,293
| -58% | -$972K |
|
224
Casey's General Stores
CASY
$18.7B
| $701K | 0.05% |
+5,841
| New | +$701K |
|
225
Oracle
ORCL
$646B
| $697K | 0.05% |
+17,761
| New | +$697K |
|