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 |
iShares Russell 2000 ETF
IWM
|
$27.5M |
| 2 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$16.3M |
| 3 |
Walt Disney
DIS
|
$13.9M |
| 4 |
iShares MSCI Emerging Markets ETF
EEM
|
$10.4M |
| 5 |
Gilead Sciences
GILD
|
$10.4M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$95.3M |
| 2 |
Apple
AAPL
|
$21.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$20M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$12.1M |
Sector Composition
| 1 | Healthcare | 13.63% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.7% |
| 4 | Technology | 9.67% |
| 5 | Financials | 9.48% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
226
Enovis
ENOV
$1.84B
| $502K | 0.04% |
+9,753
| New | +$502K |
|
227
DexCom
DXCM
$31.6B
| $501K | 0.04% |
+23,352
| New | +$501K |
|
228
Southwest Airlines
LUV
$16.5B
| $499K | 0.04% |
13,121
-74,189
| -85% | -$2.82M |
|
229
Seagate
STX
$40B
| $493K | 0.04% |
+11,012
| New | +$493K |
|
|
WLL
230
DELISTED
Whiting Petroleum Corporation
WLL
| $492K | 0.04% |
108
+48
| +80% | +$219K |
|
231
Southern Company
SO
$101B
| $490K | 0.04% |
10,974
+2,417
| +28% | +$108K |
|
232
Universal Health Services
UHS
$12.1B
| $489K | 0.04% |
3,920
-623
| -14% | -$77.7K |
|
233
ASML
ASML
$307B
| $483K | 0.04% |
+5,500
| New | +$483K |
|
234
iShares Preferred and Income Securities ETF
PFF
$14.5B
| $482K | 0.04% |
12,496
+11,200
| +864% | +$432K |
|
235
ProShares Ultra Real Estate
URE
$60.3M
| $482K | 0.04% |
10,452
+7,732
| +284% | +$357K |
|
236
Utilities Select Sector SPDR Fund
XLU
$20.7B
| $480K | 0.04% |
+11,107
| New | +$480K |
|
|
PNK
237
DELISTED
Pinnacle Entertainment Inc.
PNK
| $477K | 0.04% |
+14,108
| New | +$477K |
|
|
GWR
238
DELISTED
Genesee & Wyoming Inc.
GWR
| $470K | 0.03% |
7,957
+6,955
| +694% | +$411K |
|
239
Garmin
GRMN
$45.7B
| $467K | 0.03% |
13,028
-359
| -3% | -$12.9K |
|
|
INXN
240
DELISTED
Interxion Holding N.V.
INXN
| $467K | 0.03% |
17,274
-2,054
| -11% | -$55.5K |
|
241
Adobe
ADBE
$148B
| $464K | 0.03% |
5,653
+4,408
| +354% | +$362K |
|
242
TSMC
TSM
$1.26T
| $461K | 0.03% |
+22,237
| New | +$461K |
|
243
United Rentals
URI
$62.7B
| $461K | 0.03% |
7,688
-5,328
| -41% | -$319K |
|
244
Conagra Brands
CAG
$9.23B
| $458K | 0.03% |
14,559
+8,305
| +133% | +$261K |
|
245
Cooper Companies
COO
$13.5B
| $455K | 0.03% |
+12,252
| New | +$455K |
|
246
Heron Therapeutics
HRTX
$201M
| $455K | 0.03% |
18,652
+16,552
| +788% | +$404K |
|
247
iShares US Home Construction ETF
ITB
$3.35B
| $455K | 0.03% |
+17,450
| New | +$455K |
|
248
Raymond James Financial
RJF
$33B
| $454K | 0.03% |
+13,727
| New | +$454K |
|
249
Marriott International Class A Common Stock
MAR
$71.9B
| $449K | 0.03% |
6,596
+5,606
| +566% | +$382K |
|
250
Danaher
DHR
$143B
| $448K | 0.03% |
+7,823
| New | +$448K |
|