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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
NETI
1326
DELISTED
Eneti Inc.
NETI
| $63K | ﹤0.01% |
9,578
-24,756
| -72% | -$163K |
|
1327
Apyx Medical
APYX
$79.4M
| $62K | ﹤0.01% |
13,922
-6,190
| -31% | -$27.6K |
|
1328
Essent Group
ESNT
$6.29B
| $62K | ﹤0.01% |
1,785
+767
| +75% | +$26.6K |
|
1329
Global Net Lease
GNL
$1.81B
| $62K | ﹤0.01% |
5,866
-1,078
| -16% | -$11.4K |
|
1330
Heritage Insurance Holdings
HRTG
$763M
| $62K | ﹤0.01% |
27,766
+19,757
| +247% | +$44.1K |
|
1331
Photronics
PLAB
$1.33B
| $62K | ﹤0.01% |
4,265
-17,139
| -80% | -$249K |
|
1332
Werner Enterprises
WERN
$1.68B
| $62K | ﹤0.01% |
1,664
+120
| +8% | +$4.47K |
|
1333
Wintrust Financial
WTFC
$9.08B
| $62K | ﹤0.01% |
761
-2,117
| -74% | -$172K |
|
|
WW
1334
DELISTED
WW International
WW
| $62K | ﹤0.01% |
15,795
+4,956
| +46% | +$19.5K |
|
|
AERI
1335
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $62K | ﹤0.01% |
+4,120
| New | +$62K |
|
|
AFMD
1336
DELISTED
Affimed
AFMD
| $61K | ﹤0.01% |
3,003
+980
| +48% | +$19.9K |
|
1337
Allbirds
BIRD
$49.9M
| $61K | ﹤0.01% |
1,011
-1,702
| -63% | -$103K |
|
1338
Genesco
GCO
$358M
| $61K | ﹤0.01% |
1,567
+1,232
| +368% | +$48K |
|
1339
Mercer International
MERC
$206M
| $61K | ﹤0.01% |
+4,980
| New | +$61K |
|
1340
Nektar Therapeutics
NKTR
$926M
| $61K | ﹤0.01% |
1,287
+307
| +31% | +$14.6K |
|
1341
Rexford Industrial Realty
REXR
$10.3B
| $61K | ﹤0.01% |
+1,174
| New | +$61K |
|
1342
Ryan Specialty Holdings
RYAN
$6.61B
| $61K | ﹤0.01% |
1,526
+1,360
| +819% | +$54.4K |
|
1343
SPDR Bloomberg Short Term High Yield Bond ETF
SJNK
$4.87B
| $61K | ﹤0.01% |
2,569
+200
| +8% | +$4.75K |
|
|
FFAI
1344
Faraday Future Intelligent Electric Inc. Common Stock
FFAI
$253M
| $61K | ﹤0.01% |
+10
| New | +$61K |
|
|
ENZ
1345
DELISTED
Enzo Biochem, Inc.
ENZ
| $61K | ﹤0.01% |
27,731
+14,954
| +117% | +$32.9K |
|
|
CSII
1346
DELISTED
Cardiovascular Systems, Inc.
CSII
| $61K | ﹤0.01% |
+4,415
| New | +$61K |
|
1347
Anixa Biosciences
ANIX
$94.7M
| $60K | ﹤0.01% |
12,298
+9,686
| +371% | +$47.3K |
|
1348
GrafTech
EAF
$261M
| $60K | ﹤0.01% |
1,398
+1,208
| +636% | +$51.8K |
|
1349
Red Violet
RDVT
$679M
| $60K | ﹤0.01% |
+3,518
| New | +$60K |
|
1350
Amalgamated Financial
AMAL
$859M
| $59K | ﹤0.01% |
2,639
+1,939
| +277% | +$43.4K |
|