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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Vanguard Total Stock Market ETF
VTI
$527B
| $1.46M | ﹤0.01% |
10,102
-3,871
| -28% | -$560K |
|
|
CS
177
DELISTED
Credit Suisse Group
CS
| $1.45M | ﹤0.01% |
124,269
-35,795
| -22% | -$417K |
|
|
LSI
178
DELISTED
Life Storage, Inc.
LSI
| $1.44M | ﹤0.01% |
22,238
-8,824
| -28% | -$572K |
|
179
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$11.2B
| $1.43M | ﹤0.01% |
156,165
-150,075
| -49% | -$1.38M |
|
180
Teck Resources
TECK
$16.5B
| $1.43M | ﹤0.01% |
61,665
+58,906
| +2,135% | +$1.37M |
|
181
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$13.5B
| $1.42M | ﹤0.01% |
+12,892
| New | +$1.42M |
|
182
Bilibili
BILI
$9.19B
| $1.38M | ﹤0.01% |
72,861
+40,368
| +124% | +$765K |
|
183
Atlassian
TEAM
$45B
| $1.37M | ﹤0.01% |
12,207
+10,523
| +625% | +$1.18M |
|
184
DexCom
DXCM
$31.2B
| $1.36M | ﹤0.01% |
45,548
+28,204
| +163% | +$840K |
|
185
VanEck JP Morgan EM Local Currency Bond ETF
EMLC
$3.7B
| $1.35M | ﹤0.01% |
40,326
+39,206
| +3,501% | +$1.31M |
|
186
Cummins
CMI
$54.9B
| $1.32M | ﹤0.01% |
8,379
+3,998
| +91% | +$631K |
|
187
Ventas
VTR
$30.7B
| $1.32M | ﹤0.01% |
20,705
+6,955
| +51% | +$444K |
|
188
Coherent
COHR
$14.9B
| $1.32M | ﹤0.01% |
35,468
-4,688
| -12% | -$174K |
|
189
Check Point Software Technologies
CHKP
$20.5B
| $1.31M | ﹤0.01% |
10,385
-2,721
| -21% | -$344K |
|
190
Match Group
MTCH
$9.05B
| $1.31M | ﹤0.01% |
23,156
+7,106
| +44% | +$402K |
|
|
STAY
191
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $1.31M | ﹤0.01% |
72,750
+51,321
| +239% | +$921K |
|
192
Consolidated Edison
ED
$35.3B
| $1.3M | ﹤0.01% |
15,330
+4,534
| +42% | +$384K |
|
|
AMRN
193
Amarin Corp
AMRN
$316M
| $1.28M | ﹤0.01% |
3,076
-456
| -13% | -$189K |
|
194
Bread Financial
BFH
$3.08B
| $1.27M | ﹤0.01% |
9,127
+2,584
| +39% | +$361K |
|
195
Tyson Foods
TSN
$19.9B
| $1.27M | ﹤0.01% |
18,354
-1,624
| -8% | -$113K |
|
196
Canadian Solar
CSIQ
$742M
| $1.27M | ﹤0.01% |
67,942
-16,271
| -19% | -$303K |
|
197
iShares TIPS Bond ETF
TIP
$13.6B
| $1.26M | ﹤0.01% |
11,175
+11,030
| +7,607% | +$1.25M |
|
198
Cars.com
CARS
$833M
| $1.24M | ﹤0.01% |
54,543
+46,819
| +606% | +$1.07M |
|
199
S&P Global
SPGI
$164B
| $1.24M | ﹤0.01% |
+5,891
| New | +$1.24M |
|
200
Live Nation Entertainment
LYV
$37.7B
| $1.24M | ﹤0.01% |
+19,452
| New | +$1.24M |
|