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 | |
|---|---|---|---|---|---|---|
251
MarketAxess Holdings
MKTX
$7.04B
| $939K | ﹤0.01% |
3,819
+268
| +8% | +$65.9K |
|
252
SPDR S&P Bank ETF
KBE
$1.62B
| $933K | ﹤0.01% |
22,359
-11,011
| -33% | -$459K |
|
253
iShares MSCI China ETF
MCHI
$7.91B
| $931K | ﹤0.01% |
14,916
+9,702
| +186% | +$606K |
|
254
iShares Silver Trust
SLV
$20.1B
| $928K | ﹤0.01% |
65,474
+65,374
| +65,374% | +$927K |
|
255
Valmont Industries
VMI
$7.41B
| $926K | ﹤0.01% |
7,124
-3,915
| -35% | -$509K |
|
256
NCR Voyix
VYX
$1.83B
| $924K | ﹤0.01% |
+55,237
| New | +$924K |
|
|
GOOS
257
Canada Goose Holdings
GOOS
$1.3B
| $917K | ﹤0.01% |
+19,111
| New | +$917K |
|
258
Macy's
M
$4.58B
| $913K | ﹤0.01% |
38,020
-71,945
| -65% | -$1.73M |
|
259
Deere & Co
DE
$128B
| $911K | ﹤0.01% |
5,701
-1,244
| -18% | -$199K |
|
260
Marathon Petroleum
MPC
$54.3B
| $907K | ﹤0.01% |
15,158
-6,404
| -30% | -$383K |
|
261
VanEck Biotech ETF
BBH
$356M
| $900K | ﹤0.01% |
+7,005
| New | +$900K |
|
262
Telephone and Data Systems
TDS
$4.55B
| $890K | ﹤0.01% |
28,983
+28,059
| +3,037% | +$862K |
|
|
X
263
DELISTED
US Steel
X
| $877K | ﹤0.01% |
+45,008
| New | +$877K |
|
264
Yelp
YELP
$2B
| $877K | ﹤0.01% |
25,441
-34,212
| -57% | -$1.18M |
|
265
ProShares UltraPro Dow 30
UDOW
$715M
| $875K | ﹤0.01% |
+18,146
| New | +$875K |
|
266
Immersion
IMMR
$228M
| $860K | ﹤0.01% |
102,018
+58,611
| +135% | +$494K |
|
267
Church & Dwight Co
CHD
$23.3B
| $855K | ﹤0.01% |
12,011
+4,901
| +69% | +$349K |
|
268
Pure Storage
PSTG
$25.7B
| $846K | ﹤0.01% |
38,851
+21,630
| +126% | +$471K |
|
|
CLVS
269
DELISTED
Clovis Oncology, Inc.
CLVS
| $846K | ﹤0.01% |
34,090
-48,221
| -59% | -$1.2M |
|
270
iShares Expanded Tech-Software Sector ETF
IGV
$9.79B
| $844K | ﹤0.01% |
+20,025
| New | +$844K |
|
271
Invesco S&P 500 Low Volatility ETF
SPLV
$7.97B
| $842K | ﹤0.01% |
+16,007
| New | +$842K |
|
272
Arista Networks
ANET
$179B
| $833K | ﹤0.01% |
42,432
-114,320
| -73% | -$2.24M |
|
273
Public Storage
PSA
$52.2B
| $832K | ﹤0.01% |
+3,821
| New | +$832K |
|
274
Liberty Global Class C
LBTYK
$4.17B
| $830K | ﹤0.01% |
34,290
-50,648
| -60% | -$1.23M |
|
275
Funko
FNKO
$172M
| $829K | ﹤0.01% |
38,170
+32,013
| +520% | +$695K |
|