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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1601
CALL
Alexandria Real Estate Equities
ARE
$8.88B
| $4.78M | ﹤0.01% |
37,700
+9,300
| +33% | +$1M |
|
|
GTLS
1602
PUT
DELISTED
Chart Industries
GTLS
| $4.77M | ﹤0.01% |
35,000
+28,500
| +438% | +$3.85M |
|
1603
PUT
Shake Shack
SHAK
$2.3B
| $4.76M | ﹤0.01% |
64,200
+8,400
| +15% | +$515K |
|
1604
Invesco Solar ETF
TAN
$1.47B
| $4.75M | ﹤0.01% |
89,043
+61,177
| +220% | +$2.86M |
|
1605
PUT
UGI
UGI
$8B
| $4.75M | ﹤0.01% |
193,000
+65,800
| +52% | +$1.45M |
|
1606
Caesars Entertainment
CZR
$6.1B
| $4.75M | ﹤0.01% |
+101,228
| New | +$4.5M |
|
1607
PUT
Saia
SAIA
$11.3B
| $4.73M | ﹤0.01% |
10,800
-2,900
| -21% | -$1.17M |
|
1608
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $4.71M | ﹤0.01% |
531,300
+333,100
| +168% | +$2.71M |
|
|
DENT
1609
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $4.71M | ﹤0.01% |
676,700
+157,200
| +30% | +$1.09M |
|
1610
PUT
Chemours
CC
$2.59B
| $4.7M | ﹤0.01% |
149,000
+28,000
| +23% | +$760K |
|
1611
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.22B
| $4.7M | ﹤0.01% |
72,750
+39,588
| +119% | +$2M |
|
1612
PUT
Universal Display
OLED
$3.71B
| $4.68M | ﹤0.01% |
24,500
+3,400
| +16% | +$562K |
|
|
PPLC
1613
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $4.68M | ﹤0.01% |
83,700
-728,900
| -90% | -$40.8M |
|
1614
PUT
Papa John's
PZZA
$999M
| $4.68M | ﹤0.01% |
61,400
+2,800
| +5% | +$190K |
|
1615
PUT
Bausch Health
BHC
$1.65B
| $4.68M | ﹤0.01% |
583,500
+325,800
| +126% | +$2.37M |
|
1616
Celanese
CE
$5.09B
| $4.67M | ﹤0.01% |
30,069
+16,336
| +119% | +$2.13M |
|
1617
CALL
Ares Capital
ARCC
$13.5B
| $4.67M | ﹤0.01% |
233,200
+82,400
| +55% | +$1.61M |
|
|
EXE
1618
PUT
Expand Energy Corp
EXE
$21.9B
| $4.67M | ﹤0.01% |
60,700
+15,900
| +35% | +$1.31M |
|
1619
PUT
Cognizant
CTSH
$21.5B
| $4.66M | ﹤0.01% |
61,700
+16,600
| +37% | +$1.15M |
|
1620
PUT
Roivant Sciences
ROIV
$25.2B
| $4.65M | ﹤0.01% |
413,900
+259,100
| +167% | +$2.53M |
|
1621
PUT
Dutch Bros
BROS
$8.78B
| $4.64M | ﹤0.01% |
146,600
+20,000
| +16% | +$545K |
|
1622
PUT
W.W. Grainger
GWW
$65.3B
| $4.64M | ﹤0.01% |
5,600
+300
| +6% | +$231K |
|
1623
CALL
Range Resources
RRC
$9.11B
| $4.64M | ﹤0.01% |
152,400
+18,400
| +14% | +$604K |
|
|
WRK
1624
PUT
DELISTED
WestRock Company
WRK
| $4.63M | ﹤0.01% |
111,600
+45,200
| +68% | +$1.74M |
|
1625
PUT
Banc of California
BANC
$3.28B
| $4.63M | ﹤0.01% |
344,900
+103,800
| +43% | +$1.28M |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.