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 | |
|---|---|---|---|---|---|---|
226
Innovative Industrial Properties
IIPR
$1.61B
| $1.86M | ﹤0.01% |
21,010
+9,706
| +86% | +$859K |
|
227
Garmin
GRMN
$45.7B
| $1.86M | ﹤0.01% |
+23,103
| New | +$1.86M |
|
228
Xcel Energy
XEL
$43B
| $1.85M | ﹤0.01% |
28,942
+11,479
| +66% | +$735K |
|
229
Global X Uranium ETF
URA
$4.17B
| $1.84M | ﹤0.01% |
93,024
+22,753
| +32% | +$451K |
|
230
Futu Holdings
FUTU
$26.1B
| $1.84M | ﹤0.01% |
+49,332
| New | +$1.84M |
|
|
NKLA
231
DELISTED
Nikola Corporation Common Stock
NKLA
| $1.84M | ﹤0.01% |
17,395
+17,298
| +17,833% | +$1.83M |
|
232
US Foods
USFD
$17.5B
| $1.83M | ﹤0.01% |
69,169
+67,966
| +5,650% | +$1.8M |
|
233
Dynavax Technologies
DVAX
$1.18B
| $1.82M | ﹤0.01% |
174,146
+61,088
| +54% | +$638K |
|
234
AutoZone
AZO
$70.6B
| $1.8M | ﹤0.01% |
+842
| New | +$1.8M |
|
235
Healthcare Realty
HR
$6.35B
| $1.8M | ﹤0.01% |
86,115
+76,314
| +779% | +$1.59M |
|
236
Unity
U
$18.5B
| $1.79M | ﹤0.01% |
56,166
+39,194
| +231% | +$1.25M |
|
237
Altimmune
ALT
$334M
| $1.76M | ﹤0.01% |
137,743
+12,481
| +10% | +$159K |
|
238
Kyndryl
KD
$7.57B
| $1.75M | ﹤0.01% |
+211,040
| New | +$1.75M |
|
239
Transocean
RIG
$2.9B
| $1.75M | ﹤0.01% |
706,595
+378,922
| +116% | +$936K |
|
240
Enterprise Products Partners
EPD
$68.6B
| $1.72M | ﹤0.01% |
+72,278
| New | +$1.72M |
|
241
United Natural Foods
UNFI
$1.75B
| $1.72M | ﹤0.01% |
49,963
-3,927
| -7% | -$135K |
|
242
MPLX
MPLX
$51.5B
| $1.7M | ﹤0.01% |
56,726
+9,878
| +21% | +$296K |
|
243
Nice
NICE
$8.67B
| $1.7M | ﹤0.01% |
9,024
+6,416
| +246% | +$1.21M |
|
244
Axsome Therapeutics
AXSM
$6.25B
| $1.7M | ﹤0.01% |
38,051
+11,711
| +44% | +$522K |
|
245
Peloton Interactive
PTON
$3.27B
| $1.67M | ﹤0.01% |
240,367
+85,206
| +55% | +$590K |
|
246
Casella Waste Systems
CWST
$6.01B
| $1.66M | ﹤0.01% |
+21,793
| New | +$1.66M |
|
247
Invesco DB Commodity Index Tracking Fund
DBC
$1.26B
| $1.66M | ﹤0.01% |
69,582
+55,251
| +386% | +$1.32M |
|
|
NSTG
248
DELISTED
NanoString Technologies, Inc.
NSTG
| $1.66M | ﹤0.01% |
130,086
+44,292
| +52% | +$566K |
|
249
Valmont Industries
VMI
$7.46B
| $1.66M | ﹤0.01% |
+6,179
| New | +$1.66M |
|
250
Phillips Edison & Co
PECO
$4.54B
| $1.65M | ﹤0.01% |
+58,701
| New | +$1.65M |
|