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 | |
|---|---|---|---|---|---|---|
326
Synovus
SNV
$7.2B
| $1.57M | ﹤0.01% |
41,760
+20,776
| +99% | +$782K |
|
327
Direxion Daily Homebuilders & Supplies Bull 3X Shares
NAIL
$683M
| $1.56M | ﹤0.01% |
14,229
+1,090
| +8% | +$120K |
|
|
SPLK
328
DELISTED
Splunk Inc
SPLK
| $1.55M | ﹤0.01% |
10,153
-108,509
| -91% | -$16.5M |
|
|
JKS
329
JinkoSolar
JKS
$1.29B
| $1.53M | ﹤0.01% |
41,539
+12,785
| +44% | +$472K |
|
330
Nordic American Tanker
NAT
$688M
| $1.53M | ﹤0.01% |
+364,711
| New | +$1.53M |
|
331
Fastly
FSLY
$1.11B
| $1.51M | ﹤0.01% |
85,068
+47,894
| +129% | +$852K |
|
332
Liberty Global Class A
LBTYA
$3.99B
| $1.51M | ﹤0.01% |
85,200
+30,782
| +57% | +$547K |
|
|
SWAV
333
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $1.51M | ﹤0.01% |
7,942
+630
| +9% | +$120K |
|
334
C3.ai
AI
$2.16B
| $1.51M | ﹤0.01% |
+52,536
| New | +$1.51M |
|
335
Ross Stores
ROST
$49.6B
| $1.51M | ﹤0.01% |
10,882
+4,637
| +74% | +$641K |
|
336
Under Armour Class C
UA
$2.11B
| $1.5M | ﹤0.01% |
179,649
+59,772
| +50% | +$499K |
|
337
Independence Realty Trust
IRT
$4.18B
| $1.49M | ﹤0.01% |
+97,573
| New | +$1.49M |
|
338
Western Union
WU
$2.82B
| $1.48M | ﹤0.01% |
123,956
-10,339
| -8% | -$123K |
|
339
EPAM Systems
EPAM
$9.16B
| $1.48M | ﹤0.01% |
+4,961
| New | +$1.48M |
|
340
Vanguard World Funds Extended Duration ETF
EDV
$3.72B
| $1.47M | ﹤0.01% |
18,138
+5,326
| +42% | +$431K |
|
341
Algoma Steel
ASTL
$523M
| $1.46M | ﹤0.01% |
145,280
+57,549
| +66% | +$577K |
|
342
Under Armour
UAA
$2.19B
| $1.45M | ﹤0.01% |
164,995
-18,182
| -10% | -$160K |
|
|
KRTX
343
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $1.45M | ﹤0.01% |
+4,574
| New | +$1.45M |
|
344
Sigma Lithium
SGML
$695M
| $1.44M | ﹤0.01% |
45,684
-16,030
| -26% | -$505K |
|
345
JB Hunt Transport Services
JBHT
$13.8B
| $1.44M | ﹤0.01% |
+7,185
| New | +$1.44M |
|
346
Weyerhaeuser
WY
$18.7B
| $1.43M | ﹤0.01% |
41,224
+5,319
| +15% | +$185K |
|
347
Nu Holdings
NU
$73.5B
| $1.4M | ﹤0.01% |
+168,662
| New | +$1.4M |
|
348
Jefferies Financial Group
JEF
$13.2B
| $1.4M | ﹤0.01% |
34,635
+29,342
| +554% | +$1.19M |
|
349
Telephone and Data Systems
TDS
$4.41B
| $1.39M | ﹤0.01% |
75,791
-4,365
| -5% | -$80.1K |
|
350
Spectrum Brands
SPB
$1.34B
| $1.39M | ﹤0.01% |
17,412
-13,444
| -44% | -$1.07M |
|