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 |
Boeing
BA
|
+$49.5M |
| 2 |
Pinduoduo
PDD
|
+$45.3M |
| 3 |
Microsoft
MSFT
|
+$42.5M |
| 4 |
Apple
AAPL
|
+$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$95.4M |
| 2 |
Citigroup
C
|
+$57.9M |
| 3 |
Pfizer
PFE
|
+$55.9M |
| 4 |
TSMC
TSM
|
+$40.4M |
| 5 |
Starbucks
SBUX
|
+$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1101
Aterian
ATER
$9.63M
| $99K | ﹤0.01% |
34,510
+13,979
| +68% | +$40.1K |
|
1102
CNX Resources
CNX
$4.23B
| $99K | ﹤0.01% |
+3,049
| New | +$99K |
|
1103
Prothena Corp
PRTA
$454M
| $99K | ﹤0.01% |
5,977
+3,710
| +164% | +$61.5K |
|
1104
Sangamo Therapeutics
SGMO
$160M
| $99K | ﹤0.01% |
114,736
+70,832
| +161% | +$61.1K |
|
1105
SmartRent
SMRT
$280M
| $99K | ﹤0.01% |
57,558
+55,428
| +2,602% | +$95.3K |
|
1106
TMC The Metals Company
TMC
$2.1B
| $98K | ﹤0.01% |
+93,052
| New | +$98K |
|
1107
Tennant Co
TNC
$1.54B
| $98K | ﹤0.01% |
1,025
+715
| +231% | +$68.4K |
|
1108
BJ's Restaurants
BJRI
$716M
| $97K | ﹤0.01% |
3,005
-25,746
| -90% | -$831K |
|
|
BRAG
1109
Bragg Gaming Group
BRAG
$68M
| $97K | ﹤0.01% |
+19,480
| New | +$97K |
|
1110
MacroGenics
MGNX
$104M
| $97K | ﹤0.01% |
29,615
+958
| +3% | +$3.14K |
|
1111
Morgan Stanley Direct Lending Fund
MSDL
$1.55B
| $97K | ﹤0.01% |
+4,952
| New | +$97K |
|
1112
VanEck Retail ETF
RTH
$264M
| $97K | ﹤0.01% |
449
+365
| +435% | +$78.9K |
|
1113
Thomson Reuters
TRI
$78.2B
| $97K | ﹤0.01% |
572
-1,487
| -72% | -$252K |
|
1114
ABM Industries
ABM
$2.87B
| $95K | ﹤0.01% |
+1,806
| New | +$95K |
|
1115
Redwire
RDW
$1.22B
| $95K | ﹤0.01% |
+13,904
| New | +$95K |
|
1116
AudioEye
AEYE
$167M
| $94K | ﹤0.01% |
4,120
-17,298
| -81% | -$395K |
|
|
SLRN
1117
DELISTED
ACELYRIN
SLRN
| $94K | ﹤0.01% |
+19,200
| New | +$94K |
|
1118
Vermilion Energy
VET
$1.14B
| $94K | ﹤0.01% |
9,671
-9,341
| -49% | -$90.8K |
|
|
MRNS
1119
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $94K | ﹤0.01% |
53,637
-11,404
| -18% | -$20K |
|
1120
ProFrac Holding
ACDC
$698M
| $93K | ﹤0.01% |
13,826
-7,687
| -36% | -$51.7K |
|
1121
SPDR Portfolio Long Term Treasury ETF
SPTL
$11.8B
| $92K | ﹤0.01% |
3,184
+2,690
| +545% | +$77.7K |
|
|
VERV
1122
DELISTED
Verve Therapeutics
VERV
| $92K | ﹤0.01% |
19,077
-8,394
| -31% | -$40.5K |
|
1123
Mitsubishi UFJ Financial
MUFG
$178B
| $91K | ﹤0.01% |
8,962
+4,205
| +88% | +$42.7K |
|
1124
Soho House & Co
SHCO
$1.73B
| $91K | ﹤0.01% |
17,855
-7,817
| -30% | -$39.8K |
|
1125
Black Diamond Therapeutics
BDTX
$192M
| $90K | ﹤0.01% |
20,799
-235
| -1% | -$1.02K |
|