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 |
NVIDIA
NVDA
|
+$114M |
| 2 |
Citigroup
C
|
+$77M |
| 3 |
Broadcom
AVGO
|
+$53M |
| 4 |
Pinduoduo
PDD
|
+$49.7M |
| 5 |
Intel
INTC
|
+$44.5M |
Top Sells
| 1 |
Energy Select Sector SPDR Fund
XLE
|
+$92.5M |
| 2 |
Pfizer
PFE
|
+$67.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
+$44.9M |
| 5 |
PayPal
PYPL
|
+$44.4M |
Sector Composition
| 1 | Technology | 27.91% |
| 2 | Consumer Discretionary | 14.92% |
| 3 | Healthcare | 10.74% |
| 4 | Financials | 10.11% |
| 5 | Materials | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1901
Invesco Golden Dragon China ETF
PGJ
$158M
| $7K | ﹤0.01% |
+334
| New | +$7K |
|
1902
CarParts.com
PRTS
$41.9M
| $7K | ﹤0.01% |
7,427
+6,589
| +786% | +$6.21K |
|
1903
Ryerson Holding
RYI
$743M
| $7K | ﹤0.01% |
+367
| New | +$7K |
|
1904
Sonic Automotive
SAH
$2.68B
| $7K | ﹤0.01% |
+146
| New | +$7K |
|
1905
Sprott Gold Miners ETF
SGDM
$550M
| $7K | ﹤0.01% |
+270
| New | +$7K |
|
1906
Scully Royalty
SRL
$81.5M
| $7K | ﹤0.01% |
1,016
+901
| +783% | +$6.21K |
|
1907
Transact Technologies
TACT
$46.6M
| $7K | ﹤0.01% |
+2,045
| New | +$7K |
|
|
XNET
1908
Xunlei
XNET
$482M
| $7K | ﹤0.01% |
4,638
+4,632
| +77,200% | +$6.99K |
|
1909
Acurx Pharmaceuticals
ACXP
$6.62M
| $6K | ﹤0.01% |
146
-390
| -73% | -$16K |
|
1910
ADC Therapeutics
ADCT
$366M
| $6K | ﹤0.01% |
1,938
-12,817
| -87% | -$39.7K |
|
1911
Aegon
AEG
$12.4B
| $6K | ﹤0.01% |
1,009
-3,624
| -78% | -$21.6K |
|
1912
Allete
ALE
$3.65B
| $6K | ﹤0.01% |
100
-808
| -89% | -$48.5K |
|
1913
Alarm.com
ALRM
$2.78B
| $6K | ﹤0.01% |
101
-690
| -87% | -$41K |
|
1914
Apyx Medical
APYX
$79.4M
| $6K | ﹤0.01% |
4,564
-4,156
| -48% | -$5.46K |
|
1915
Blend Labs
BLND
$1.11B
| $6K | ﹤0.01% |
2,755
-56,834
| -95% | -$124K |
|
1916
Citius Pharmaceuticals
CTXR
$19.4M
| $6K | ﹤0.01% |
426
+137
| +47% | +$1.93K |
|
1917
Strive US Energy ETF
DRLL
$259M
| $6K | ﹤0.01% |
+211
| New | +$6K |
|
1918
Equillium
EQ
$106M
| $6K | ﹤0.01% |
9,071
+3,916
| +76% | +$2.59K |
|
1919
Fidelity MSCI Health Care Index ETF
FHLC
$2.44B
| $6K | ﹤0.01% |
+100
| New | +$6K |
|
1920
1-800-Flowers.com
FLWS
$344M
| $6K | ﹤0.01% |
700
+302
| +76% | +$2.59K |
|
1921
Harvard Bioscience
HBIO
$19.5M
| $6K | ﹤0.01% |
2,165
+2,064
| +2,044% | +$5.72K |
|
1922
Health Catalyst
HCAT
$211M
| $6K | ﹤0.01% |
+1,090
| New | +$6K |
|
1923
Invivyd
IVVD
$264M
| $6K | ﹤0.01% |
5,528
-2,132
| -28% | -$2.31K |
|
1924
KraneShares Electric Vehicles and Future Mobility Index ETF
KARS
$79.3M
| $6K | ﹤0.01% |
+334
| New | +$6K |
|
1925
iShares Global Consumer Staples ETF
KXI
$854M
| $6K | ﹤0.01% |
+100
| New | +$6K |
|