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 | |
|---|---|---|---|---|---|---|
1651
MaxCyte
MXCT
$155M
| $13K | ﹤0.01% |
3,499
+1,873
| +115% | +$6.96K |
|
1652
Nerdy
NRDY
$158M
| $13K | ﹤0.01% |
14,182
-527
| -4% | -$483 |
|
1653
Insperity
NSP
$1.99B
| $13K | ﹤0.01% |
152
-315
| -67% | -$26.9K |
|
|
NXDT
1654
NexPoint Diversified Real Estate Trust
NXDT
$179M
| $13K | ﹤0.01% |
2,129
-18
| -0.8% | -$110 |
|
1655
Prudential
PUK
$35.5B
| $13K | ﹤0.01% |
741
-2,558
| -78% | -$44.9K |
|
1656
Regenxbio
RGNX
$465M
| $13K | ﹤0.01% |
1,287
-3,968
| -76% | -$40.1K |
|
1657
SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$12.7B
| $13K | ﹤0.01% |
291
+125
| +75% | +$5.58K |
|
1658
Teledyne Technologies
TDY
$26.1B
| $13K | ﹤0.01% |
30
-64
| -68% | -$27.7K |
|
1659
UFP Industries
UFPI
$5.78B
| $13K | ﹤0.01% |
104
-318
| -75% | -$39.8K |
|
|
SEI
1660
Solaris Energy Infrastructure, Inc.
SEI
$1.39B
| $13K | ﹤0.01% |
+1,036
| New | +$13K |
|
1661
PRA Group
PRAA
$657M
| $12K | ﹤0.01% |
569
-4,512
| -89% | -$95.2K |
|
1662
Reservoir Media
RSVR
$517M
| $12K | ﹤0.01% |
+1,544
| New | +$12K |
|
1663
Allete
ALE
$3.67B
| $12K | ﹤0.01% |
196
+96
| +96% | +$5.88K |
|
|
CEPU
1664
Central Puerto
CEPU
$1.29B
| $12K | ﹤0.01% |
+1,321
| New | +$12K |
|
1665
CureVac
CVAC
$1.2B
| $12K | ﹤0.01% |
4,362
-29
| -0.7% | -$80 |
|
1666
Fidelity MSCI Consumer Discretionary Index ETF
FDIS
$1.91B
| $12K | ﹤0.01% |
+138
| New | +$12K |
|
1667
Franklin Wireless
FKWL
$47.6M
| $12K | ﹤0.01% |
2,794
+1,293
| +86% | +$5.55K |
|
1668
IHS Holding
IHS
$2.55B
| $12K | ﹤0.01% |
4,101
+2,754
| +204% | +$8.06K |
|
1669
Ingles Markets
IMKTA
$1.32B
| $12K | ﹤0.01% |
172
-90
| -34% | -$6.28K |
|
1670
MediWound
MDWD
$194M
| $12K | ﹤0.01% |
694
+128
| +23% | +$2.21K |
|
1671
Mesa Air Group
MESA
$57.4M
| $12K | ﹤0.01% |
10,020
-82,242
| -89% | -$98.5K |
|
1672
Similarweb
SMWB
$857M
| $12K | ﹤0.01% |
+1,396
| New | +$12K |
|
1673
Invesco PHLX Semiconductor ETF
SOXQ
$540M
| $12K | ﹤0.01% |
+295
| New | +$12K |
|
1674
Sapiens International
SPNS
$2.4B
| $12K | ﹤0.01% |
+327
| New | +$12K |
|
|
TOUR
1675
Tuniu
TOUR
$109M
| $12K | ﹤0.01% |
9,048
-2,264
| -20% | -$3K |
|