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 |
Microsoft
MSFT
|
$101M |
| 2 |
NVIDIA
NVDA
|
$66M |
| 3 |
Citigroup
C
|
$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$64M |
| 3 |
Meta Platforms (Facebook)
META
|
$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
$34.3M |
| 5 |
PayPal
PYPL
|
$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
ATVI
251
DELISTED
Activision Blizzard Inc.
ATVI
| $1.64M | ﹤0.01% |
22,121
-209,849
| -90% | -$15.6M |
|
252
Stryker
SYK
$150B
| $1.64M | ﹤0.01% |
+8,115
| New | +$1.64M |
|
253
Vanguard Russell 2000 Growth ETF
VTWG
$1.08B
| $1.63M | ﹤0.01% |
10,836
-25,964
| -71% | -$3.9M |
|
254
Coterra Energy
CTRA
$18.3B
| $1.61M | ﹤0.01% |
61,724
-12,816
| -17% | -$335K |
|
255
IMAX
IMAX
$1.6B
| $1.59M | ﹤0.01% |
112,559
+60,189
| +115% | +$850K |
|
|
KRTX
256
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $1.59M | ﹤0.01% |
7,058
+6,908
| +4,605% | +$1.55M |
|
|
PBT
257
Permian Basin Royalty Trust
PBT
$838M
| $1.59M | ﹤0.01% |
97,113
+19,864
| +26% | +$324K |
|
258
Vanguard S&P 500 Growth ETF
VOOG
$19.3B
| $1.58M | ﹤0.01% |
7,600
+999
| +15% | +$208K |
|
259
Nu Skin
NUS
$569M
| $1.58M | ﹤0.01% |
+47,362
| New | +$1.58M |
|
260
American Homes 4 Rent
AMH
$12.9B
| $1.57M | ﹤0.01% |
+47,883
| New | +$1.57M |
|
261
Landstar System
LSTR
$4.58B
| $1.55M | ﹤0.01% |
10,746
+10,738
| +134,225% | +$1.55M |
|
|
EBIX
262
DELISTED
Ebix Inc
EBIX
| $1.55M | ﹤0.01% |
81,758
+28,566
| +54% | +$542K |
|
263
Ambarella
AMBA
$3.54B
| $1.53M | ﹤0.01% |
27,188
-9,722
| -26% | -$546K |
|
264
ProShares Ultra Bloomberg Crude Oil
UCO
$356M
| $1.5M | ﹤0.01% |
57,247
-30,897
| -35% | -$811K |
|
265
SPDR Portfolio S&P 500 Value ETF
SPYV
$28B
| $1.5M | ﹤0.01% |
+43,500
| New | +$1.5M |
|
266
Domino's
DPZ
$15.7B
| $1.5M | ﹤0.01% |
4,833
-5,118
| -51% | -$1.59M |
|
267
J.M. Smucker
SJM
$12B
| $1.49M | ﹤0.01% |
+10,879
| New | +$1.49M |
|
268
United Airlines
UAL
$34.5B
| $1.49M | ﹤0.01% |
45,682
+43,682
| +2,184% | +$1.42M |
|
|
ATCO
269
DELISTED
Atlas Corp.
ATCO
| $1.49M | ﹤0.01% |
106,904
+98,291
| +1,141% | +$1.37M |
|
270
Direxion Daily Small Cap Bear 3x Shares
TZA
$287M
| $1.47M | ﹤0.01% |
+32,046
| New | +$1.47M |
|
271
United Rentals
URI
$62.7B
| $1.46M | ﹤0.01% |
+5,419
| New | +$1.46M |
|
272
ARK Genomic Revolution ETF
ARKG
$1.08B
| $1.46M | ﹤0.01% |
44,366
+41,266
| +1,331% | +$1.36M |
|
273
Barclays
BCS
$69.1B
| $1.45M | ﹤0.01% |
226,743
-6,214
| -3% | -$39.8K |
|
|
CHNG
274
DELISTED
Change Healthcare Inc. Common Stock
CHNG
| $1.44M | ﹤0.01% |
52,419
+15,768
| +43% | +$433K |
|
275
Prothena Corp
PRTA
$460M
| $1.43M | ﹤0.01% |
23,666
+20,435
| +632% | +$1.24M |
|