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 | |
|---|---|---|---|---|---|---|
1751
Nektar Therapeutics
NKTR
$932M
| $13K | ﹤0.01% |
408
-879
| -68% | -$28K |
|
1752
Nkarta
NKTX
$140M
| $13K | ﹤0.01% |
+2,203
| New | +$13K |
|
1753
US Treasury 10 Year Note ETF
UTEN
$225M
| $13K | ﹤0.01% |
+300
| New | +$13K |
|
1754
Glimpse Group
VRAR
$31.6M
| $13K | ﹤0.01% |
+4,322
| New | +$13K |
|
1755
Wallbox
WBX
$68.4M
| $13K | ﹤0.01% |
+185
| New | +$13K |
|
|
XNET
1756
Xunlei
XNET
$482M
| $13K | ﹤0.01% |
7,201
-13,828
| -66% | -$25K |
|
|
RNLX
1757
DELISTED
Renalytix plc American Depositary Shares
RNLX
| $13K | ﹤0.01% |
7,231
+2,559
| +55% | +$4.6K |
|
|
ZNH
1758
DELISTED
China Southern Airlines Company Limited
ZNH
| $13K | ﹤0.01% |
+415
| New | +$13K |
|
|
VIVO
1759
DELISTED
Meridian Bioscience Inc
VIVO
| $13K | ﹤0.01% |
+400
| New | +$13K |
|
1760
Bitwise Crypto Industry Innovators ETF
BITQ
$352M
| $12K | ﹤0.01% |
+3,738
| New | +$12K |
|
1761
CEVA Inc
CEVA
$586M
| $12K | ﹤0.01% |
+492
| New | +$12K |
|
1762
CION Investment
CION
$509M
| $12K | ﹤0.01% |
1,303
-7,604
| -85% | -$70K |
|
1763
CuriosityStream
CURI
$278M
| $12K | ﹤0.01% |
11,223
+5,836
| +108% | +$6.24K |
|
1764
First Trust Global Wind Energy ETF
FAN
$182M
| $12K | ﹤0.01% |
724
-482
| -40% | -$7.99K |
|
1765
Lazydays
GORV
$9.15M
| $12K | ﹤0.01% |
+34
| New | +$12K |
|
1766
Invitation Homes
INVH
$18.2B
| $12K | ﹤0.01% |
+418
| New | +$12K |
|
1767
Jack in the Box
JACK
$370M
| $12K | ﹤0.01% |
177
-316
| -64% | -$21.4K |
|
1768
Lemonade
LMND
$4.19B
| $12K | ﹤0.01% |
937
+100
| +12% | +$1.28K |
|
1769
Momentus
MNTS
$14M
| $12K | ﹤0.01% |
23
-9
| -28% | -$4.7K |
|
1770
Oportun Financial
OPRT
$294M
| $12K | ﹤0.01% |
+2,301
| New | +$12K |
|
1771
PennantPark Floating Rate Capital
PFLT
$974M
| $12K | ﹤0.01% |
1,176
+788
| +203% | +$8.04K |
|
1772
Pinterest
PINS
$24.7B
| $12K | ﹤0.01% |
500
+400
| +400% | +$9.6K |
|
1773
REE Automotive
REE
$20.3M
| $12K | ﹤0.01% |
1,039
+583
| +128% | +$6.73K |
|
1774
Regenxbio
RGNX
$459M
| $12K | ﹤0.01% |
547
-639
| -54% | -$14K |
|
1775
Ryan Specialty Holdings
RYAN
$6.62B
| $12K | ﹤0.01% |
305
-1,221
| -80% | -$48K |
|