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 | |
|---|---|---|---|---|---|---|
1076
SPX Corp
SPXC
$9.21B
| $88K | ﹤0.01% |
1,343
-60
| -4% | -$3.93K |
|
1077
Teradata
TDC
$2B
| $88K | ﹤0.01% |
2,619
-9,867
| -79% | -$332K |
|
|
SUM
1078
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $88K | ﹤0.01% |
+3,121
| New | +$88K |
|
|
PAYA
1079
DELISTED
Paya Holdings Inc. Class A Common Stock
PAYA
| $88K | ﹤0.01% |
11,285
+2,000
| +22% | +$15.6K |
|
1080
Chewy
CHWY
$14.4B
| $87K | ﹤0.01% |
+2,357
| New | +$87K |
|
1081
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.81B
| $87K | ﹤0.01% |
2,490
-742
| -23% | -$25.9K |
|
1082
Mid-America Apartment Communities
MAA
$16.6B
| $87K | ﹤0.01% |
559
-1,473
| -72% | -$229K |
|
1083
NIO
NIO
$14B
| $87K | ﹤0.01% |
8,939
-442,023
| -98% | -$4.3M |
|
1084
RLJ Lodging Trust
RLJ
$1.15B
| $87K | ﹤0.01% |
8,306
+1,334
| +19% | +$14K |
|
1085
Satellogic
SATL
$404M
| $87K | ﹤0.01% |
28,713
+28,613
| +28,613% | +$86.7K |
|
1086
Invesco S&P 500 High Beta ETF
SPHB
$448M
| $87K | ﹤0.01% |
+1,397
| New | +$87K |
|
1087
The ONE Group
STKS
$81.1M
| $87K | ﹤0.01% |
13,888
+1,674
| +14% | +$10.5K |
|
|
AY
1088
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $87K | ﹤0.01% |
+3,383
| New | +$87K |
|
1089
American States Water
AWR
$2.82B
| $86K | ﹤0.01% |
931
+658
| +241% | +$60.8K |
|
|
EXK
1090
Endeavour Silver
EXK
$1.78B
| $86K | ﹤0.01% |
26,753
-8,726
| -25% | -$28.1K |
|
1091
Blackbaud
BLKB
$3.38B
| $85K | ﹤0.01% |
+1,446
| New | +$85K |
|
|
ZUO
1092
DELISTED
Zuora, Inc.
ZUO
| $85K | ﹤0.01% |
13,444
+9,818
| +271% | +$62.1K |
|
1093
Acadia Pharmaceuticals
ACAD
$3.98B
| $84K | ﹤0.01% |
5,300
-9,502
| -64% | -$151K |
|
1094
Vanguard Short-Term Bond ETF
BSV
$38.5B
| $84K | ﹤0.01% |
+1,116
| New | +$84K |
|
1095
Direxion Daily Energy Bear 2X Shares
ERY
$22.4M
| $84K | ﹤0.01% |
+2,892
| New | +$84K |
|
1096
Green Dot
GDOT
$751M
| $84K | ﹤0.01% |
5,351
+4,586
| +599% | +$72K |
|
|
MSB
1097
Mesabi Trust
MSB
$412M
| $84K | ﹤0.01% |
4,687
-1,377
| -23% | -$24.7K |
|
|
NIU
1098
Niu Technologies
NIU
$316M
| $84K | ﹤0.01% |
16,245
+12,659
| +353% | +$65.5K |
|
|
TGB
1099
Taseko Mines
TGB
$1.12B
| $84K | ﹤0.01% |
57,734
+7,892
| +16% | +$11.5K |
|
1100
AvePoint
AVPT
$3.31B
| $83K | ﹤0.01% |
20,241
-11,304
| -36% | -$46.4K |
|