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
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1751
TopBuild
BLD
$11.7B
| $15K | ﹤0.01% |
47
-187
| -80% | -$59.7K |
|
1752
AGF US Market Neutral Anti-Beta Fund
BTAL
$378M
| $15K | ﹤0.01% |
+898
| New | +$15K |
|
1753
Broadwind
BWEN
$51.6M
| $15K | ﹤0.01% |
8,498
+3,692
| +77% | +$6.52K |
|
|
CEPU
1754
Central Puerto
CEPU
$1.29B
| $15K | ﹤0.01% |
1,296
-387
| -23% | -$4.48K |
|
1755
Strive US Energy ETF
DRLL
$260M
| $15K | ﹤0.01% |
+557
| New | +$15K |
|
1756
Erie Indemnity
ERIE
$17.7B
| $15K | ﹤0.01% |
+45
| New | +$15K |
|
1757
Ezcorp Inc
EZPW
$1.04B
| $15K | ﹤0.01% |
1,085
-14,323
| -93% | -$198K |
|
1758
Greif
GEF
$3.59B
| $15K | ﹤0.01% |
235
+144
| +158% | +$9.19K |
|
1759
Greystone Housing Impact Investors LP
GHI
$254M
| $15K | ﹤0.01% |
1,355
+831
| +159% | +$9.2K |
|
1760
Harmonic Inc
HLIT
$1.13B
| $15K | ﹤0.01% |
1,661
-2,643
| -61% | -$23.9K |
|
1761
Mitek Systems
MITK
$467M
| $15K | ﹤0.01% |
1,598
-1,879
| -54% | -$17.6K |
|
1762
Newmark Group
NMRK
$3.41B
| $15K | ﹤0.01% |
1,296
+914
| +239% | +$10.6K |
|
1763
Energy Vault
NRGV
$371M
| $15K | ﹤0.01% |
21,726
-17,387
| -44% | -$12K |
|
1764
Nuvectis Pharma
NVCT
$157M
| $15K | ﹤0.01% |
+2,114
| New | +$15K |
|
1765
Organon & Co
OGN
$2.77B
| $15K | ﹤0.01% |
+1,608
| New | +$15K |
|
1766
Pliant Therapeutics
PLRX
$97.6M
| $15K | ﹤0.01% |
13,286
+7,983
| +151% | +$9.01K |
|
1767
SIGA Technologies
SIGA
$639M
| $15K | ﹤0.01% |
2,316
-131
| -5% | -$848 |
|
1768
Toro Company
TTC
$7.76B
| $15K | ﹤0.01% |
+217
| New | +$15K |
|
1769
Vista Gold
VGZ
$229M
| $15K | ﹤0.01% |
+16,390
| New | +$15K |
|
1770
Cactus
WHD
$2.74B
| $15K | ﹤0.01% |
352
+256
| +267% | +$10.9K |
|
1771
Metallus
MTUS
$697M
| $15K | ﹤0.01% |
+992
| New | +$15K |
|
|
BHR
1772
Braemar Hotels & Resorts
BHR
$203M
| $14K | ﹤0.01% |
6,038
-24,586
| -80% | -$57K |
|
1773
Brady Corp
BRC
$3.74B
| $14K | ﹤0.01% |
+206
| New | +$14K |
|
1774
Century Casinos
CNTY
$76.3M
| $14K | ﹤0.01% |
6,720
+5,872
| +692% | +$12.2K |
|
1775
California Water Service
CWT
$2.76B
| $14K | ﹤0.01% |
318
+240
| +308% | +$10.6K |
|