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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
301
SPDR Euro Stoxx 50 ETF
FEZ
$4.57B
| $1.83M | ﹤0.01% |
+38,373
| New | +$1.83M |
|
302
lululemon athletica
LULU
$19.9B
| $1.82M | ﹤0.01% |
+3,563
| New | +$1.82M |
|
303
Lockheed Martin
LMT
$107B
| $1.79M | ﹤0.01% |
+3,946
| New | +$1.79M |
|
304
Insulet
PODD
$24.6B
| $1.76M | ﹤0.01% |
+8,117
| New | +$1.76M |
|
|
LSXMK
305
DELISTED
Liberty Media Corporation Series C Liberty SiriusXM Common Stock
LSXMK
| $1.76M | ﹤0.01% |
61,217
+33,291
| +119% | +$958K |
|
306
Icahn Enterprises
IEP
$4.83B
| $1.76M | ﹤0.01% |
+102,125
| New | +$1.76M |
|
307
GitLab
GTLB
$7.99B
| $1.72M | ﹤0.01% |
27,353
+20,738
| +313% | +$1.31M |
|
308
First Majestic Silver
AG
$4.61B
| $1.72M | ﹤0.01% |
279,070
-119,561
| -30% | -$735K |
|
309
Masimo
MASI
$8.08B
| $1.72M | ﹤0.01% |
14,646
-36,043
| -71% | -$4.22M |
|
310
Interpublic Group of Companies
IPG
$9.89B
| $1.71M | ﹤0.01% |
+52,497
| New | +$1.71M |
|
311
argenx
ARGX
$47B
| $1.69M | ﹤0.01% |
4,446
-352
| -7% | -$134K |
|
312
Ferrari
RACE
$85.3B
| $1.69M | ﹤0.01% |
4,991
+3,467
| +227% | +$1.17M |
|
313
Sibanye-Stillwater
SBSW
$6.38B
| $1.68M | ﹤0.01% |
309,868
-26,136
| -8% | -$142K |
|
314
Rapid7
RPD
$1.33B
| $1.68M | ﹤0.01% |
+29,435
| New | +$1.68M |
|
315
Sprott Junior Uranium Miners ETF
URNJ
$348M
| $1.68M | ﹤0.01% |
71,112
-18,384
| -21% | -$434K |
|
316
iShares US Home Construction ETF
ITB
$3.36B
| $1.66M | ﹤0.01% |
16,355
+15,194
| +1,309% | +$1.54M |
|
317
Arcus Biosciences
RCUS
$1.22B
| $1.66M | ﹤0.01% |
87,084
+2,291
| +3% | +$43.8K |
|
318
Axsome Therapeutics
AXSM
$6.45B
| $1.66M | ﹤0.01% |
20,813
+13,267
| +176% | +$1.06M |
|
319
Mativ Holdings
MATV
$680M
| $1.66M | ﹤0.01% |
108,127
+59,003
| +120% | +$903K |
|
320
e.l.f. Beauty
ELF
$7.83B
| $1.63M | ﹤0.01% |
+11,288
| New | +$1.63M |
|
321
BellRing Brands
BRBR
$4.51B
| $1.61M | ﹤0.01% |
+29,027
| New | +$1.61M |
|
322
Matador Resources
MTDR
$5.89B
| $1.6M | ﹤0.01% |
28,192
+23,484
| +499% | +$1.33M |
|
323
Impinj
PI
$5.84B
| $1.6M | ﹤0.01% |
17,748
+7,096
| +67% | +$639K |
|
324
Pebblebrook Hotel Trust
PEB
$1.37B
| $1.59M | ﹤0.01% |
+99,806
| New | +$1.59M |
|
325
Cardinal Health
CAH
$35.9B
| $1.57M | ﹤0.01% |
15,614
-21,615
| -58% | -$2.18M |
|