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 |
Alphabet (Google) Class C
GOOG
|
$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 4 |
Alibaba
BABA
|
$9.66M |
| 5 |
Intel
INTC
|
$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
$36.8M |
| 2 |
Gilead Sciences
GILD
|
$31.2M |
| 3 |
Booking.com
BKNG
|
$29M |
| 4 |
Amazon
AMZN
|
$25.6M |
| 5 |
Baidu
BIDU
|
$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
iShares Silver Trust
SLV
$20B
| $552K | 0.06% |
+34,708
| New | +$552K |
|
177
Melco Resorts & Entertainment
MLCO
$3.94B
| $550K | 0.06% |
25,659
-49,997
| -66% | -$1.07M |
|
178
Abercrombie & Fitch
ANF
$4.4B
| $545K | 0.06% |
24,740
+17,616
| +247% | +$388K |
|
179
Rio Tinto
RIO
$101B
| $543K | 0.06% |
+13,128
| New | +$543K |
|
|
MDCO
180
DELISTED
Medicines Co
MDCO
| $543K | 0.06% |
19,410
+18,168
| +1,463% | +$508K |
|
181
iShares China Large-Cap ETF
FXI
$6.55B
| $542K | 0.06% |
+12,224
| New | +$542K |
|
182
Signet Jewelers
SIG
$3.73B
| $540K | 0.06% |
3,896
+2,310
| +146% | +$320K |
|
183
Sony
SONY
$167B
| $540K | 0.06% |
+100,990
| New | +$540K |
|
184
Edwards Lifesciences
EW
$47.5B
| $539K | 0.06% |
22,740
-19,656
| -46% | -$466K |
|
185
Capri Holdings
CPRI
$2.59B
| $534K | 0.06% |
8,125
-16,970
| -68% | -$1.12M |
|
186
O'Reilly Automotive
ORLY
$89.1B
| $534K | 0.06% |
37,065
+18,885
| +104% | +$272K |
|
187
KKR & Co
KKR
$122B
| $527K | 0.06% |
23,137
+22,554
| +3,869% | +$514K |
|
|
INFA
188
DELISTED
INFORMATICA CORP
INFA
| $527K | 0.06% |
12,033
+8,938
| +289% | +$391K |
|
|
SBNY
189
DELISTED
Signature Bank
SBNY
| $526K | 0.06% |
+4,066
| New | +$526K |
|
190
Occidental Petroleum
OXY
$45.9B
| $525K | 0.06% |
+7,210
| New | +$525K |
|
191
Vanguard FTSE Emerging Markets ETF
VWO
$96.1B
| $525K | 0.06% |
+12,866
| New | +$525K |
|
192
Adverum Biotechnologies
ADVM
$66.5M
| $523K | 0.06% |
+1,292
| New | +$523K |
|
193
Bristol-Myers Squibb
BMY
$95B
| $522K | 0.06% |
+8,105
| New | +$522K |
|
194
ProShares UltraPro S&P 500
UPRO
$4.54B
| $522K | 0.06% |
+47,016
| New | +$522K |
|
195
Entergy
ETR
$39.4B
| $513K | 0.06% |
13,250
+7,940
| +150% | +$307K |
|
196
Workday
WDAY
$61.7B
| $505K | 0.06% |
5,993
-510
| -8% | -$43K |
|
197
Comcast
CMCSA
$125B
| $499K | 0.06% |
17,678
+3,846
| +28% | +$109K |
|
198
Garmin
GRMN
$45.7B
| $497K | 0.06% |
10,460
+2,388
| +30% | +$113K |
|
|
ALXN
199
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $497K | 0.06% |
2,869
+1,821
| +174% | +$315K |
|
200
Las Vegas Sands
LVS
$37.8B
| $485K | 0.06% |
8,829
-51,222
| -85% | -$2.81M |
|