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
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MRTX
226
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.56M | ﹤0.01% |
+34,488
| New | +$1.56M |
|
227
M&T Bank
MTB
$31.2B
| $1.56M | ﹤0.01% |
10,759
+2,687
| +33% | +$390K |
|
228
SPDR Portfolio S&P 500 Value ETF
SPYV
$28.2B
| $1.56M | ﹤0.01% |
40,007
-3,493
| -8% | -$136K |
|
229
Invesco DB US Dollar Index Bearish Fund
UDN
$146M
| $1.56M | ﹤0.01% |
84,069
-62,773
| -43% | -$1.16M |
|
230
Rockwell Automation
ROK
$38.6B
| $1.55M | ﹤0.01% |
+6,009
| New | +$1.55M |
|
231
Alexandria Real Estate Equities
ARE
$14.3B
| $1.54M | ﹤0.01% |
10,546
-8,434
| -44% | -$1.23M |
|
232
AutoZone
AZO
$71.8B
| $1.51M | ﹤0.01% |
613
-229
| -27% | -$564K |
|
233
Hologic
HOLX
$14.8B
| $1.51M | ﹤0.01% |
20,176
+15,870
| +369% | +$1.19M |
|
234
Nice
NICE
$8.85B
| $1.49M | ﹤0.01% |
7,774
-1,250
| -14% | -$240K |
|
235
Deutsche Bank
DB
$68.8B
| $1.49M | ﹤0.01% |
+129,648
| New | +$1.49M |
|
236
Aehr Test Systems
AEHR
$803M
| $1.49M | ﹤0.01% |
74,197
-169,826
| -70% | -$3.41M |
|
|
SWN
237
DELISTED
Southwestern Energy Company
SWN
| $1.49M | ﹤0.01% |
254,796
+221,974
| +676% | +$1.3M |
|
238
Aptiv
APTV
$17.9B
| $1.48M | ﹤0.01% |
+15,916
| New | +$1.48M |
|
239
Cboe Global Markets
CBOE
$24.3B
| $1.48M | ﹤0.01% |
11,803
-13,988
| -54% | -$1.75M |
|
240
Lazard
LAZ
$5.21B
| $1.47M | ﹤0.01% |
42,541
+42,184
| +11,816% | +$1.46M |
|
241
Bank of America
BAC
$372B
| $1.47M | ﹤0.01% |
+44,502
| New | +$1.47M |
|
242
TE Connectivity
TEL
$61.7B
| $1.45M | ﹤0.01% |
12,662
-15,865
| -56% | -$1.82M |
|
243
Kornit Digital
KRNT
$675M
| $1.44M | ﹤0.01% |
62,867
+20,241
| +47% | +$465K |
|
244
Akero Therapeutics
AKRO
$3.57B
| $1.44M | ﹤0.01% |
26,286
-52,085
| -66% | -$2.85M |
|
245
SPDR S&P MidCap 400 ETF Trust
MDY
$23.9B
| $1.43M | ﹤0.01% |
3,236
-9,224
| -74% | -$4.08M |
|
246
AGCO
AGCO
$8.03B
| $1.43M | ﹤0.01% |
10,315
+6,885
| +201% | +$954K |
|
|
KRTX
247
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $1.42M | ﹤0.01% |
7,232
+174
| +2% | +$34.2K |
|
248
Lumen
LUMN
$5.78B
| $1.42M | ﹤0.01% |
272,180
-418,780
| -61% | -$2.18M |
|
249
GFL Environmental
GFL
$17.4B
| $1.42M | ﹤0.01% |
+48,571
| New | +$1.42M |
|
250
Roku
ROKU
$14.3B
| $1.41M | ﹤0.01% |
34,618
-30,691
| -47% | -$1.25M |
|