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 |
Apple
AAPL
|
$32.9M |
| 2 |
Gilead Sciences
GILD
|
$30.1M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$16.2M |
Top Sells
Sector Composition
| 1 | Consumer Discretionary | 23.68% |
| 2 | Technology | 19.11% |
| 3 | Healthcare | 14.31% |
| 4 | Energy | 9.3% |
| 5 | Communication Services | 8.24% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
151
Workday
WDAY
$62.3B
| $531K | 0.06% |
+6,503
| New | +$531K |
|
|
XLRN
152
DELISTED
Acceleron Pharma Inc.
XLRN
| $530K | 0.06% |
+13,602
| New | +$530K |
|
153
Vail Resorts
MTN
$5.91B
| $529K | 0.06% |
+5,808
| New | +$529K |
|
154
Labcorp
LH
$22.8B
| $527K | 0.06% |
+4,887
| New | +$527K |
|
155
Unisys
UIS
$273M
| $526K | 0.06% |
+17,851
| New | +$526K |
|
|
WUBA
156
DELISTED
58.COM INC
WUBA
| $521K | 0.06% |
+12,551
| New | +$521K |
|
|
DD
157
DELISTED
Du Pont De Nemours E I
DD
| $518K | 0.06% |
+7,005
| New | +$518K |
|
|
ADT
158
DELISTED
ADT CORP
ADT
| $510K | 0.06% |
+14,065
| New | +$510K |
|
159
Coterra Energy
CTRA
$18.4B
| $499K | 0.06% |
+16,861
| New | +$499K |
|
160
DuPont de Nemours
DD
$31.6B
| $486K | 0.06% |
+10,657
| New | +$486K |
|
161
Direxion Daily Real Estate Bull 3X Shares
DRN
$62.2M
| $480K | 0.06% |
+6,081
| New | +$480K |
|
162
Vanguard Health Care ETF
VHT
$15.5B
| $480K | 0.06% |
+3,822
| New | +$480K |
|
|
RAI
163
DELISTED
Reynolds American Inc
RAI
| $478K | 0.06% |
+7,439
| New | +$478K |
|
|
BDSI
164
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $478K | 0.06% |
+39,795
| New | +$478K |
|
165
Ralph Lauren
RL
$19B
| $475K | 0.06% |
+2,563
| New | +$475K |
|
166
Knowles
KN
$1.8B
| $473K | 0.06% |
+20,088
| New | +$473K |
|
167
Parker-Hannifin
PH
$94.8B
| $463K | 0.06% |
+3,592
| New | +$463K |
|
168
Danaher
DHR
$143B
| $459K | 0.06% |
+5,357
| New | +$459K |
|
169
Regeneron Pharmaceuticals
REGN
$59.8B
| $455K | 0.06% |
+1,110
| New | +$455K |
|
170
FirstEnergy
FE
$25.1B
| $453K | 0.05% |
+11,606
| New | +$453K |
|
171
NCR Voyix
VYX
$1.76B
| $446K | 0.05% |
+15,314
| New | +$446K |
|
172
Apollo Global Management
APO
$75.9B
| $445K | 0.05% |
+18,892
| New | +$445K |
|
173
Strategy Inc Common Stock Class A
MSTR
$93.6B
| $439K | 0.05% |
+2,701
| New | +$439K |
|
174
Clorox
CLX
$15B
| $438K | 0.05% |
+4,199
| New | +$438K |
|
|
P
175
DELISTED
Pandora Media Inc
P
| $437K | 0.05% |
+24,501
| New | +$437K |
|