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 | |
|---|---|---|---|---|---|---|
1751
Mueller Water Products
MWA
$3.91B
| $13K | ﹤0.01% |
+731
| New | +$13K |
|
1752
One Stop Systems
OSS
$122M
| $13K | ﹤0.01% |
+5,475
| New | +$13K |
|
1753
ProPhase Labs
PRPH
$18M
| $13K | ﹤0.01% |
3,242
+2,839
| +704% | +$11.4K |
|
|
RDNW
1754
RideNow Group, Inc. Class B Common Stock
RDNW
$156M
| $13K | ﹤0.01% |
+3,284
| New | +$13K |
|
1755
ProShares Ultra Technology
ROM
$815M
| $13K | ﹤0.01% |
187
-1,077
| -85% | -$74.9K |
|
1756
SPDR Portfolio Long Term Treasury ETF
SPTL
$11.8B
| $13K | ﹤0.01% |
494
-1,738
| -78% | -$45.7K |
|
1757
Sasol
SSL
$4.46B
| $13K | ﹤0.01% |
1,765
-3,524
| -67% | -$26K |
|
1758
Sutro Biopharma
STRO
$74.3M
| $13K | ﹤0.01% |
4,714
+3,650
| +343% | +$10.1K |
|
1759
ThredUp
TDUP
$1.28B
| $13K | ﹤0.01% |
7,877
+2,774
| +54% | +$4.58K |
|
1760
VOC Energy
VOC
$46.6M
| $13K | ﹤0.01% |
2,857
+2,581
| +935% | +$11.7K |
|
1761
iShares S&P Small-Cap 600 Growth ETF
IJT
$6.27B
| $12K | ﹤0.01% |
+100
| New | +$12K |
|
|
ILPT
1762
Industrial Logistics Properties Trust
ILPT
$424M
| $12K | ﹤0.01% |
3,473
-2,336
| -40% | -$8.07K |
|
1763
iShares US Healthcare ETF
IYH
$2.76B
| $12K | ﹤0.01% |
+200
| New | +$12K |
|
1764
Kodiak Sciences
KOD
$489M
| $12K | ﹤0.01% |
+5,309
| New | +$12K |
|
1765
Kennedy-Wilson Holdings
KW
$1.24B
| $12K | ﹤0.01% |
1,310
-2,784
| -68% | -$25.5K |
|
1766
Avient
AVNT
$3.31B
| $12K | ﹤0.01% |
287
-84
| -23% | -$3.51K |
|
1767
Dragonfly Energy
DFLI
$16.9M
| $12K | ﹤0.01% |
1,618
-2,200
| -58% | -$16.3K |
|
1768
Edgewell Personal Care
EPC
$1.01B
| $12K | ﹤0.01% |
309
-482
| -61% | -$18.7K |
|
1769
iShares MSCI Italy ETF
EWI
$729M
| $12K | ﹤0.01% |
351
+240
| +216% | +$8.21K |
|
1770
Gaia
GAIA
$152M
| $12K | ﹤0.01% |
2,940
+2,694
| +1,095% | +$11K |
|
1771
Hain Celestial
HAIN
$194M
| $12K | ﹤0.01% |
1,865
-35,121
| -95% | -$226K |
|
|
LADR
1772
Ladder Capital
LADR
$1.48B
| $12K | ﹤0.01% |
+1,135
| New | +$12K |
|
1773
loanDepot
LDI
$894M
| $12K | ﹤0.01% |
7,511
-6,813
| -48% | -$10.9K |
|
1774
MidCap Financial Investment
MFIC
$1.16B
| $12K | ﹤0.01% |
823
-11,836
| -93% | -$173K |
|
1775
Minerals Technologies
MTX
$1.99B
| $12K | ﹤0.01% |
+155
| New | +$12K |
|