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 |
Alphabet (Google) Class C
GOOG
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GAU
1576
Galiano Gold
GAU
$654M
| $1K | ﹤0.01% |
800
+200
| +33% | +$250 |
|
1577
Gevo
GEVO
$404M
| $1K | ﹤0.01% |
+1
| New | +$1K |
|
1578
Gold Resource Corp
GORO
$133M
| $1K | ﹤0.01% |
+403
| New | +$1K |
|
1579
Gran Tierra Energy
GTE
$136M
| $1K | ﹤0.01% |
+37
| New | +$1K |
|
1580
Gyre Therapeutics
GYRE
$711M
| $1K | ﹤0.01% |
+1
| New | +$1K |
|
1581
Imunon
IMNN
$14.5M
| – | – |
0
| – | – |
|
1582
Jabil
JBL
$23B
| $1K | ﹤0.01% |
+72
| New | +$1K |
|
1583
KB Home
KBH
$4.48B
| $1K | ﹤0.01% |
74
-58,036
| -100% | -$784K |
|
1584
Kforce
KFRC
$567M
| $1K | ﹤0.01% |
46
-112
| -71% | -$2.44K |
|
1585
LG Display
LPL
$4.46B
| $1K | ﹤0.01% |
+119
| New | +$1K |
|
1586
Liquidity Services
LQDT
$849M
| $1K | ﹤0.01% |
189
-2,641
| -93% | -$14K |
|
1587
Mattel
MAT
$5.72B
| $1K | ﹤0.01% |
54
-2,002
| -97% | -$37.1K |
|
1588
Medical Properties Trust
MPW
$3.08B
| $1K | ﹤0.01% |
100
-37
| -27% | -$370 |
|
|
MRIN
1589
DELISTED
Marin Software
MRIN
| $1K | ﹤0.01% |
+6
| New | +$1K |
|
1590
Mueller Water Products
MWA
$3.91B
| $1K | ﹤0.01% |
+122
| New | +$1K |
|
1591
NatWest
NWG
$58.2B
| $1K | ﹤0.01% |
+131
| New | +$1K |
|
1592
Plains GP Holdings
PAGP
$3.7B
| $1K | ﹤0.01% |
+14
| New | +$1K |
|
1593
PDF Solutions
PDFS
$765M
| $1K | ﹤0.01% |
+89
| New | +$1K |
|
|
PHX
1594
DELISTED
PHX Minerals
PHX
| $1K | ﹤0.01% |
+69
| New | +$1K |
|
1595
Progress Software
PRGS
$1.81B
| $1K | ﹤0.01% |
+65
| New | +$1K |
|
1596
Primerica
PRI
$8.88B
| $1K | ﹤0.01% |
+21
| New | +$1K |
|
1597
Prospect Capital
PSEC
$1.29B
| $1K | ﹤0.01% |
+144
| New | +$1K |
|
1598
Paramount Gold Nevada
PZG
$73.6M
| $1K | ﹤0.01% |
+1,800
| New | +$1K |
|
1599
Reading International Class A
RDI
$33.8M
| $1K | ﹤0.01% |
+100
| New | +$1K |
|
1600
RPC Inc
RES
$986M
| $1K | ﹤0.01% |
+147
| New | +$1K |
|