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 | |
|---|---|---|---|---|---|---|
1676
Magnolia Oil & Gas
MGY
$4.4B
| $16K | ﹤0.01% |
699
-60,419
| -99% | -$1.38M |
|
1677
Pinduoduo
PDD
$181B
| $16K | ﹤0.01% |
200
-15,989
| -99% | -$1.28M |
|
1678
QuantumScape
QS
$5.51B
| $16K | ﹤0.01% |
2,830
| – | – |
|
1679
Resideo Technologies
REZI
$5.84B
| $16K | ﹤0.01% |
1,001
-33,877
| -97% | -$541K |
|
1680
ProShares Short Financials
SEF
$9.15M
| $16K | ﹤0.01% |
+312
| New | +$16K |
|
1681
E.W. Scripps
SSP
$246M
| $16K | ﹤0.01% |
1,279
+685
| +115% | +$8.57K |
|
1682
iShares TIPS Bond ETF
TIP
$14B
| $16K | ﹤0.01% |
155
| – | – |
|
1683
UNIFI
UFI
$82.4M
| $16K | ﹤0.01% |
1,927
-2,467
| -56% | -$20.5K |
|
1684
Frontier Group Holdings
ULCC
$1.19B
| $16K | ﹤0.01% |
+1,631
| New | +$16K |
|
1685
BioCardia
BCDA
$12.4M
| $15K | ﹤0.01% |
503
+116
| +30% | +$3.46K |
|
1686
Core & Main
CNM
$9.44B
| $15K | ﹤0.01% |
821
+475
| +137% | +$8.68K |
|
1687
Farmer Brothers
FARM
$39.4M
| $15K | ﹤0.01% |
3,429
+1,417
| +70% | +$6.2K |
|
1688
Fate Therapeutics
FATE
$109M
| $15K | ﹤0.01% |
1,504
+139
| +10% | +$1.39K |
|
1689
Great Lakes Dredge & Dock
GLDD
$833M
| $15K | ﹤0.01% |
+2,573
| New | +$15K |
|
1690
Garrett Motion
GTX
$2.65B
| $15K | ﹤0.01% |
+2,065
| New | +$15K |
|
1691
Inseego
INSG
$206M
| $15K | ﹤0.01% |
1,877
-2,604
| -58% | -$20.8K |
|
1692
Dorian LPG
LPG
$1.39B
| $15K | ﹤0.01% |
831
-26,803
| -97% | -$484K |
|
1693
MarketWise
MKTW
$48.8M
| $15K | ﹤0.01% |
447
+235
| +111% | +$7.89K |
|
1694
OneSpan
OSPN
$598M
| $15K | ﹤0.01% |
1,414
-886
| -39% | -$9.4K |
|
1695
Perimeter Solutions
PRM
$3.27B
| $15K | ﹤0.01% |
1,654
+1,464
| +771% | +$13.3K |
|
1696
Rush Enterprises Class A
RUSHA
$4.38B
| $15K | ﹤0.01% |
+453
| New | +$15K |
|
1697
Stellus Capital Investment Corp
SCM
$399M
| $15K | ﹤0.01% |
1,197
+13
| +1% | +$163 |
|
|
SELF
1698
Global Self Storage
SELF
$58.2M
| $15K | ﹤0.01% |
+3,118
| New | +$15K |
|
1699
Spero Therapeutics
SPRO
$106M
| $15K | ﹤0.01% |
9,206
+8,206
| +821% | +$13.4K |
|
1700
Strategic Education
STRA
$1.95B
| $15K | ﹤0.01% |
+203
| New | +$15K |
|