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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
UROY
1051
Uranium Royalty Corp
UROY
$420M
| $153K | ﹤0.01% |
56,737
+30,406
| +115% | +$82K |
|
1052
Lindsay Corp
LNN
$1.52B
| $152K | ﹤0.01% |
1,182
+486
| +70% | +$62.5K |
|
1053
Braze
BRZE
$3.35B
| $151K | ﹤0.01% |
2,854
+2,813
| +6,861% | +$149K |
|
1054
G-III Apparel Group
GIII
$1.12B
| $151K | ﹤0.01% |
+4,462
| New | +$151K |
|
|
EGRX
1055
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $151K | ﹤0.01% |
28,949
+28,719
| +12,487% | +$150K |
|
1056
AppFolio
APPF
$9.9B
| $150K | ﹤0.01% |
+869
| New | +$150K |
|
1057
Sleep Number
SNBR
$214M
| $150K | ﹤0.01% |
10,177
-20,433
| -67% | -$301K |
|
1058
ProShares UltraShort Russell2000
TWM
$33.7M
| $150K | ﹤0.01% |
+2,582
| New | +$150K |
|
1059
Denison Mines
DNN
$2.12B
| $149K | ﹤0.01% |
84,712
-228,554
| -73% | -$402K |
|
1060
Anterix
ATEX
$395M
| $148K | ﹤0.01% |
4,451
+288
| +7% | +$9.58K |
|
1061
iShares MSCI South Africa ETF
EZA
$442M
| $148K | ﹤0.01% |
3,550
-194
| -5% | -$8.09K |
|
1062
Hamilton Lane
HLNE
$6.53B
| $147K | ﹤0.01% |
+1,303
| New | +$147K |
|
1063
Scilex Holding
SCLX
$183M
| $147K | ﹤0.01% |
+2,061
| New | +$147K |
|
|
SILK
1064
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $147K | ﹤0.01% |
+12,022
| New | +$147K |
|
1065
uniQure
QURE
$904M
| $146K | ﹤0.01% |
21,599
+2,644
| +14% | +$17.9K |
|
1066
Golden Entertainment
GDEN
$638M
| $145K | ﹤0.01% |
+3,645
| New | +$145K |
|
|
NKLA
1067
DELISTED
Nikola Corporation Common Stock
NKLA
| $145K | ﹤0.01% |
5,560
-6,130
| -52% | -$160K |
|
1068
CNX Resources
CNX
$4.25B
| $144K | ﹤0.01% |
7,240
-7,101
| -50% | -$141K |
|
1069
GATX Corp
GATX
$6.05B
| $144K | ﹤0.01% |
+1,205
| New | +$144K |
|
|
PLL
1070
DELISTED
Piedmont Lithium
PLL
| $144K | ﹤0.01% |
+5,118
| New | +$144K |
|
|
ASTR
1071
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $144K | ﹤0.01% |
63,250
+59,605
| +1,635% | +$136K |
|
|
DX
1072
Dynex Capital
DX
$1.63B
| $143K | ﹤0.01% |
+11,469
| New | +$143K |
|
1073
Future Fuel
FF
$169M
| $142K | ﹤0.01% |
23,384
+17,491
| +297% | +$106K |
|
1074
Star Bulk Carriers
SBLK
$2.2B
| $142K | ﹤0.01% |
6,709
-44,675
| -87% | -$946K |
|
1075
Vanguard Mortgage-Backed Securities ETF
VMBS
$14.9B
| $142K | ﹤0.01% |
3,072
-1,922
| -38% | -$88.8K |
|