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 |
Apple
AAPL
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ATHX
1626
DELISTED
Athersys, Inc. Common Stock
ATHX
| $30K | ﹤0.01% |
4,708
-4,499
| -49% | -$28.7K |
|
1627
Amkor Technology
AMKR
$6.29B
| $29K | ﹤0.01% |
+1,744
| New | +$29K |
|
1628
Donaldson
DCI
$9.42B
| $29K | ﹤0.01% |
621
-3,929
| -86% | -$183K |
|
1629
Flowserve
FLS
$7.36B
| $29K | ﹤0.01% |
+1,026
| New | +$29K |
|
1630
iShares Global Tech ETF
IXN
$5.93B
| $29K | ﹤0.01% |
635
-2,155
| -77% | -$98.4K |
|
1631
Invesco Aerospace & Defense ETF
PPA
$6.29B
| $29K | ﹤0.01% |
424
-871
| -67% | -$59.6K |
|
1632
Porch Group
PRCH
$1.82B
| $29K | ﹤0.01% |
11,567
+8,898
| +333% | +$22.3K |
|
1633
RadNet
RDNT
$5.69B
| $29K | ﹤0.01% |
1,724
-823
| -32% | -$13.8K |
|
1634
Rocket Companies
RKT
$44.4B
| $29K | ﹤0.01% |
4,000
-81,574
| -95% | -$591K |
|
|
ZH
1635
Zhihu
ZH
$464M
| $29K | ﹤0.01% |
2,770
-1,659
| -37% | -$17.4K |
|
|
VIRX
1636
DELISTED
Viracta Therapeutics, Inc. Common Stock
VIRX
| $29K | ﹤0.01% |
7,536
+5,083
| +207% | +$19.6K |
|
|
AKTS
1637
DELISTED
AKOUSTIS TECHNOLOGIES, INC.
AKTS
| $29K | ﹤0.01% |
7,987
-3,649
| -31% | -$13.2K |
|
1638
VanEck Brazil Small-Cap ETF
BRF
$21.9M
| $28K | ﹤0.01% |
+2,065
| New | +$28K |
|
|
BRSP
1639
BrightSpire Capital
BRSP
$764M
| $28K | ﹤0.01% |
3,747
+2,618
| +232% | +$19.6K |
|
|
DAO
1640
Youdao
DAO
$1.06B
| $28K | ﹤0.01% |
5,854
+4,544
| +347% | +$21.7K |
|
1641
iShares Global Clean Energy ETF
ICLN
$1.58B
| $28K | ﹤0.01% |
1,500
-4,180
| -74% | -$78K |
|
1642
Koppers
KOP
$567M
| $28K | ﹤0.01% |
1,251
+971
| +347% | +$21.7K |
|
1643
Xenon Pharmaceuticals
XENE
$2.79B
| $28K | ﹤0.01% |
+940
| New | +$28K |
|
1644
Zumiez
ZUMZ
$347M
| $28K | ﹤0.01% |
+1,115
| New | +$28K |
|
|
BGXX
1645
DELISTED
Bright Green Corporation Common Stock
BGXX
| $28K | ﹤0.01% |
+12,893
| New | +$28K |
|
|
RDNW
1646
RideNow Group, Inc. Class B Common Stock
RDNW
$156M
| $27K | ﹤0.01% |
1,903
+377
| +25% | +$5.35K |
|
1647
SPDR Portfolio Europe ETF
SPEU
$699M
| $27K | ﹤0.01% |
+837
| New | +$27K |
|
1648
Spire Global
SPIR
$307M
| $27K | ﹤0.01% |
2,912
-1,803
| -38% | -$16.7K |
|
1649
Tyler Technologies
TYL
$23.6B
| $27K | ﹤0.01% |
82
-26
| -24% | -$8.56K |
|
1650
Weave Communications
WEAV
$591M
| $27K | ﹤0.01% |
+9,041
| New | +$27K |
|