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 | |
|---|---|---|---|---|---|---|
2026
Byrna Technologies
BYRN
$478M
| $9K | ﹤0.01% |
+2,069
| New | +$9K |
|
2027
DocuSign
DOCU
$17.1B
| $9K | ﹤0.01% |
177
| – | – |
|
2028
Ekso Bionics
EKSO
$11.2M
| $9K | ﹤0.01% |
393
+169
| +75% | +$3.87K |
|
2029
Escalade
ESCA
$179M
| $9K | ﹤0.01% |
+931
| New | +$9K |
|
2030
Exact Sciences
EXAS
$10.1B
| $9K | ﹤0.01% |
300
| – | – |
|
2031
Farmer Brothers
FARM
$40.2M
| $9K | ﹤0.01% |
2,012
-2,309
| -53% | -$10.3K |
|
2032
Foster
FSTR
$297M
| $9K | ﹤0.01% |
+976
| New | +$9K |
|
2033
Goldman Sachs Future Tech Leaders Equity ETF
GTEK
$190M
| $9K | ﹤0.01% |
447
-200
| -31% | -$4.03K |
|
2034
iShares US Oil Equipment & Services ETF
IEZ
$113M
| $9K | ﹤0.01% |
685
-1,800
| -72% | -$23.7K |
|
2035
Invivyd
IVVD
$262M
| $9K | ﹤0.01% |
2,960
-1,147
| -28% | -$3.49K |
|
2036
Keros Therapeutics
KROS
$651M
| $9K | ﹤0.01% |
265
+105
| +66% | +$3.57K |
|
2037
Medifast
MED
$160M
| $9K | ﹤0.01% |
+91
| New | +$9K |
|
2038
MarketWise
MKTW
$46.9M
| $9K | ﹤0.01% |
+212
| New | +$9K |
|
|
OTRK
2039
DELISTED
Ontrak
OTRK
| $9K | ﹤0.01% |
225
+175
| +350% | +$7K |
|
2040
Pangaea Logistics
PANL
$368M
| $9K | ﹤0.01% |
2,087
-7,937
| -79% | -$34.2K |
|
2041
Parsons
PSN
$8.7B
| $9K | ﹤0.01% |
+233
| New | +$9K |
|
2042
REE Automotive
REE
$20.6M
| $9K | ﹤0.01% |
456
+165
| +57% | +$3.26K |
|
2043
Invesco S&P SmallCap 600 Revenue ETF
RWJ
$1.63B
| $9K | ﹤0.01% |
300
| – | – |
|
2044
Scholastic
SCHL
$691M
| $9K | ﹤0.01% |
298
+270
| +964% | +$8.15K |
|
2045
ProShares UltraShort Semiconductors
SSG
$6.73M
| $9K | ﹤0.01% |
+11
| New | +$9K |
|
2046
SunCoke Energy
SXC
$672M
| $9K | ﹤0.01% |
1,654
-13,866
| -89% | -$75.5K |
|
2047
ThredUp
TDUP
$1.31B
| $9K | ﹤0.01% |
+5,068
| New | +$9K |
|
2048
Gentherm
THRM
$1.11B
| $9K | ﹤0.01% |
+188
| New | +$9K |
|
2049
WhiteHorse Finance
WHF
$205M
| $9K | ﹤0.01% |
+868
| New | +$9K |
|
|
YALA
2050
Yalla Group
YALA
$1.24B
| $9K | ﹤0.01% |
3,073
-13,882
| -82% | -$40.7K |
|