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 |
Amazon
AMZN
|
$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
$37M |
| 3 |
Amgen
AMGN
|
$32.3M |
| 4 |
Micron Technology
MU
|
$29.4M |
| 5 |
Qualcomm
QCOM
|
$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$29.8M |
| 2 |
Gilead Sciences
GILD
|
$29.3M |
| 3 |
Goldman Sachs
GS
|
$27.7M |
| 4 |
Booking.com
BKNG
|
$26M |
| 5 |
AT&T
T
|
$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Puma Biotechnology
PBYI
$257M
| $1.29M | 0.06% |
14,757
+9,166
| +164% | +$801K |
|
|
VAR
177
DELISTED
Varian Medical Systems, Inc.
VAR
| $1.28M | 0.06% |
12,429
+5,504
| +79% | +$568K |
|
178
iShares S&P 500 Growth ETF
IVW
$63.7B
| $1.27M | 0.06% |
+37,084
| New | +$1.27M |
|
|
CBI
179
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.26M | 0.05% |
+63,902
| New | +$1.26M |
|
180
Dycom Industries
DY
$7.35B
| $1.24M | 0.05% |
+13,846
| New | +$1.24M |
|
181
Akamai
AKAM
$11.1B
| $1.24M | 0.05% |
+24,862
| New | +$1.24M |
|
|
BSFT
182
DELISTED
BroadSoft, Inc.
BSFT
| $1.24M | 0.05% |
28,753
+16,184
| +129% | +$696K |
|
183
Snap
SNAP
$12B
| $1.23M | 0.05% |
69,464
+68,464
| +6,846% | +$1.22M |
|
|
LSI
184
DELISTED
Life Storage, Inc.
LSI
| $1.22M | 0.05% |
24,743
-775
| -3% | -$38.3K |
|
|
PXD
185
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.21M | 0.05% |
7,607
-19,626
| -72% | -$3.13M |
|
186
TripAdvisor
TRIP
$2.09B
| $1.19M | 0.05% |
31,066
+15,468
| +99% | +$591K |
|
|
FIT
187
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $1.18M | 0.05% |
222,437
+182,527
| +457% | +$969K |
|
188
iShares Core US Aggregate Bond ETF
AGG
$131B
| $1.18M | 0.05% |
10,763
+6,547
| +155% | +$717K |
|
189
Lamar Advertising Co
LAMR
$13B
| $1.18M | 0.05% |
16,009
+7,857
| +96% | +$578K |
|
|
OPB
190
DELISTED
Opus Bank Common Stock
OPB
| $1.17M | 0.05% |
48,313
+10,242
| +27% | +$248K |
|
191
Nucor
NUE
$33.3B
| $1.16M | 0.05% |
+20,000
| New | +$1.16M |
|
|
BLUE
192
DELISTED
bluebird bio
BLUE
| $1.16M | 0.05% |
849
-508
| -37% | -$691K |
|
|
WBC
193
DELISTED
WABCO HOLDINGS INC.
WBC
| $1.14M | 0.05% |
+8,922
| New | +$1.14M |
|
194
Myriad Genetics
MYGN
$632M
| $1.14M | 0.05% |
43,939
+24,701
| +128% | +$638K |
|
|
ETP
195
DELISTED
Energy Transfer Partners, L.P.
ETP
| $1.12M | 0.05% |
+54,875
| New | +$1.12M |
|
196
Garmin
GRMN
$45.7B
| $1.11M | 0.05% |
+21,738
| New | +$1.11M |
|
197
Zimmer Biomet
ZBH
$20.8B
| $1.11M | 0.05% |
+8,878
| New | +$1.11M |
|
198
Tucows
TCX
$199M
| $1.11M | 0.05% |
20,666
-9,552
| -32% | -$511K |
|
199
Welltower
WELL
$112B
| $1.1M | 0.05% |
+14,701
| New | +$1.1M |
|
200
British American Tobacco
BTI
$121B
| $1.1M | 0.05% |
+16,009
| New | +$1.1M |
|