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 | |
|---|---|---|---|---|---|---|
451
Roper Technologies
ROP
$55.2B
| $592K | ﹤0.01% |
+1,371
| New | +$592K |
|
452
Calumet Specialty Products
CLMT
$1.53B
| $590K | ﹤0.01% |
35,006
-21,061
| -38% | -$355K |
|
453
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$12.9B
| $587K | ﹤0.01% |
60,718
-92,888
| -60% | -$898K |
|
454
PG&E
PCG
$33.5B
| $573K | ﹤0.01% |
+35,295
| New | +$573K |
|
|
SBOW
455
DELISTED
SilverBow Resources, Inc.
SBOW
| $573K | ﹤0.01% |
20,270
-4,963
| -20% | -$140K |
|
456
Amplify Energy
AMPY
$161M
| $570K | ﹤0.01% |
64,933
-94,518
| -59% | -$830K |
|
457
Shake Shack
SHAK
$3.92B
| $570K | ﹤0.01% |
+13,728
| New | +$570K |
|
|
AUY
458
DELISTED
Yamana Gold, Inc.
AUY
| $567K | ﹤0.01% |
102,295
-77,667
| -43% | -$430K |
|
459
ZIM Integrated Shipping Services
ZIM
$1.59B
| $566K | ﹤0.01% |
+32,969
| New | +$566K |
|
|
VMW
460
DELISTED
VMware, Inc
VMW
| $566K | ﹤0.01% |
4,617
+4,479
| +3,246% | +$549K |
|
461
Cintas
CTAS
$81.2B
| $564K | ﹤0.01% |
+5,000
| New | +$564K |
|
462
Hanesbrands
HBI
$2.21B
| $564K | ﹤0.01% |
88,775
+58,011
| +189% | +$369K |
|
463
Garmin
GRMN
$45.4B
| $563K | ﹤0.01% |
6,101
-17,002
| -74% | -$1.57M |
|
464
iShares US Medical Devices ETF
IHI
$4.24B
| $561K | ﹤0.01% |
10,680
-15,349
| -59% | -$806K |
|
|
XM
465
DELISTED
Qualtrics International Inc. Class A Common Stock
XM
| $556K | ﹤0.01% |
53,609
-37,329
| -41% | -$387K |
|
466
Golar LNG
GLNG
$4.27B
| $554K | ﹤0.01% |
24,347
+19,568
| +409% | +$445K |
|
467
Icon
ICLR
$12.9B
| $553K | ﹤0.01% |
2,847
+2,822
| +11,288% | +$548K |
|
468
Public Storage
PSA
$50.7B
| $552K | ﹤0.01% |
1,971
-191
| -9% | -$53.5K |
|
|
GAP
469
The Gap, Inc.
GAP
$8.93B
| $552K | ﹤0.01% |
+48,984
| New | +$552K |
|
|
SGEN
470
DELISTED
Seagen Inc. Common Stock
SGEN
| $550K | ﹤0.01% |
4,286
-3,307
| -44% | -$424K |
|
471
MongoDB
MDB
$27.2B
| $549K | ﹤0.01% |
2,790
-11,179
| -80% | -$2.2M |
|
472
Cognizant
CTSH
$33.8B
| $547K | ﹤0.01% |
+9,566
| New | +$547K |
|
473
Magnachip Semiconductor
MX
$110M
| $547K | ﹤0.01% |
+58,303
| New | +$547K |
|
474
Macerich
MAC
$4.53B
| $541K | ﹤0.01% |
48,100
-2,693
| -5% | -$30.3K |
|
475
Transmedics
TMDX
$3.67B
| $540K | ﹤0.01% |
+8,757
| New | +$540K |
|