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 | |
|---|---|---|---|---|---|---|
476
Celldex Therapeutics
CLDX
$1.66B
| $539K | ﹤0.01% |
12,102
+3,186
| +36% | +$142K |
|
477
Intel
INTC
$116B
| $534K | ﹤0.01% |
20,227
+14,827
| +275% | +$391K |
|
478
LendingClub
LC
$1.86B
| $532K | ﹤0.01% |
60,468
+27,889
| +86% | +$245K |
|
479
Black Stone Minerals
BSM
$2.61B
| $530K | ﹤0.01% |
31,445
+26,630
| +553% | +$449K |
|
480
Neogen
NEOG
$1.21B
| $530K | ﹤0.01% |
34,860
-36,862
| -51% | -$560K |
|
|
VRN
481
DELISTED
Veren
VRN
| $529K | ﹤0.01% |
74,083
-134,744
| -65% | -$962K |
|
482
JFrog
FROG
$5.8B
| $523K | ﹤0.01% |
24,533
+2,724
| +12% | +$58.1K |
|
483
1-800-Flowers.com
FLWS
$326M
| $522K | ﹤0.01% |
54,634
+45,467
| +496% | +$434K |
|
484
Bentley Systems
BSY
$16B
| $521K | ﹤0.01% |
14,108
-13,293
| -49% | -$491K |
|
485
Ecolab
ECL
$76.3B
| $521K | ﹤0.01% |
+3,582
| New | +$521K |
|
|
PRVB
486
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $521K | ﹤0.01% |
49,380
+13,447
| +37% | +$142K |
|
487
The GEO Group
GEO
$3.01B
| $515K | ﹤0.01% |
47,099
-16,690
| -26% | -$182K |
|
488
Vermilion Energy
VET
$1.18B
| $511K | ﹤0.01% |
28,919
-82,401
| -74% | -$1.46M |
|
489
Schwab US Broad Market ETF
SCHB
$36.5B
| $510K | ﹤0.01% |
34,191
+7,428
| +28% | +$111K |
|
490
Trinity Industries
TRN
$2.28B
| $509K | ﹤0.01% |
17,222
+5,297
| +44% | +$157K |
|
491
Coeur Mining
CDE
$9.6B
| $505K | ﹤0.01% |
150,350
-106,975
| -42% | -$359K |
|
492
Teekay
TK
$721M
| $505K | ﹤0.01% |
111,403
+25,087
| +29% | +$114K |
|
493
Perrigo
PRGO
$3.04B
| $499K | ﹤0.01% |
14,664
-1,638
| -10% | -$55.7K |
|
494
Ardmore Shipping
ASC
$502M
| $491K | ﹤0.01% |
34,081
+3,156
| +10% | +$45.5K |
|
495
Fluence Energy
FLNC
$886M
| $487K | ﹤0.01% |
28,444
+9,772
| +52% | +$167K |
|
|
CCEC
496
Capital Clean Energy Carriers Corp. Common Share
CCEC
$1.25B
| $481K | ﹤0.01% |
35,301
-16,599
| -32% | -$226K |
|
497
Stellantis
STLA
$25.3B
| $480K | ﹤0.01% |
+33,840
| New | +$480K |
|
|
EVA
498
DELISTED
Enviva Inc.
EVA
| $478K | ﹤0.01% |
+9,032
| New | +$478K |
|
499
SBA Communications
SBAC
$20.8B
| $478K | ﹤0.01% |
+1,706
| New | +$478K |
|
500
Warby Parker
WRBY
$3.29B
| $474K | ﹤0.01% |
+35,203
| New | +$474K |
|