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 | |
|---|---|---|---|---|---|---|
|
HCP
1851
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $3.53M | ﹤0.01% |
149,500
-11,900
| -7% | -$258K |
|
1852
CALL
Flex
FLEX
$43.4B
| $3.53M | ﹤0.01% |
153,932
-53,876
| -26% | -$1.08M |
|
1853
PUT
YPF
YPF
$20.2B
| $3.53M | ﹤0.01% |
205,300
+85,000
| +71% | +$1.17M |
|
1854
PUT
Green Plains
GPRE
$1.19B
| $3.53M | ﹤0.01% |
139,900
+69,900
| +100% | +$1.85M |
|
1855
PUT
Noble Corp
NE
$6.9B
| $3.52M | ﹤0.01% |
73,100
+63,300
| +646% | +$2.96M |
|
1856
PUT
Weibo
WB
$1.9B
| $3.51M | ﹤0.01% |
320,800
+142,800
| +80% | +$1.62M |
|
1857
PUT
Perrigo
PRGO
$1.4B
| $3.51M | ﹤0.01% |
109,000
+88,300
| +427% | +$2.64M |
|
1858
PUT
Coupang
CPNG
$27.8B
| $3.5M | ﹤0.01% |
216,300
-88,500
| -29% | -$1.46M |
|
1859
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $3.49M | ﹤0.01% |
20,500
+15,800
| +336% | +$2.54M |
|
|
PR
1860
PUT
Permian Resources
PR
$17.9B
| $3.48M | ﹤0.01% |
255,900
+32,500
| +15% | +$445K |
|
1861
CALL
Chemours
CC
$2.59B
| $3.48M | ﹤0.01% |
110,300
+21,000
| +24% | +$570K |
|
1862
CALL
Unum
UNM
$13.8B
| $3.48M | ﹤0.01% |
76,900
+37,600
| +96% | +$1.71M |
|
1863
PUT
Philips
PHG
$25.4B
| $3.48M | ﹤0.01% |
166,573
-78,145
| -32% | -$1.42M |
|
|
EDR
1864
PUT
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $3.48M | ﹤0.01% |
146,500
-124,900
| -46% | -$2.82M |
|
1865
CALL
TD Synnex
SNX
$19.4B
| $3.48M | ﹤0.01% |
32,300
+30,500
| +1,694% | +$2.99M |
|
|
1866
PUT
TD Synnex
SNX
$19.4B
| $3.48M | ﹤0.01% |
32,300
+2,000
| +7% | +$196K |
|
|
1867
Weibo
WB
$1.9B
| $3.47M | ﹤0.01% |
317,310
+194,382
| +158% | +$2.21M |
|
|
ITCI
1868
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $3.47M | ﹤0.01% |
48,500
+31,600
| +187% | +$1.82M |
|
1869
CALL
TechnipFMC
FTI
$30.6B
| $3.47M | ﹤0.01% |
172,400
-99,900
| -37% | -$2.05M |
|
1870
PUT
Regions Financial
RF
$26.3B
| $3.46M | ﹤0.01% |
178,700
-244,300
| -58% | -$4.05M |
|
1871
PUT
News Corp Class B
NWS
$16.4B
| $3.46M | ﹤0.01% |
141,000
+139,200
| +7,733% | +$3.15M |
|
1872
CALL
Burford Capital
BUR
$907M
| $3.46M | ﹤0.01% |
221,500
+90,700
| +69% | +$1.21M |
|
1873
SentinelOne
S
$6.22B
| $3.46M | ﹤0.01% |
+125,923
| New | +$2.44M |
|
1874
CALL
Cracker Barrel
CBRL
$1.2B
| $3.45M | ﹤0.01% |
44,800
+3,500
| +8% | +$251K |
|
1875
CALL
Claros Mortgage Trust
CMTG
$306M
| $3.45M | ﹤0.01% |
+253,000
| New | +$3.01M |
|
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.