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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
WCN
1951
Waste Connections
WCN
$42.8B
| $2.2M | ﹤0.01% |
11,261
-1,576
| -12% | -$292K |
|
1952
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $2.19M | ﹤0.01% |
4,100
-3,100
| -43% | -$1.76M |
|
1953
CALL
Novavax
NVAX
$1.23B
| $2.18M | ﹤0.01% |
340,200
-260,100
| -43% | -$2.15M |
|
1954
CALL
Omnicom Group
OMC
$22.7B
| $2.18M | ﹤0.01% |
26,300
-8,900
| -25% | -$743K |
|
1955
CALL
Boyd Gaming
BYD
$6.47B
| $2.18M | ﹤0.01% |
33,100
-30,800
| -48% | -$2.26M |
|
1956
CALL
First Horizon
FHN
$12.1B
| $2.18M | ﹤0.01% |
112,100
+76,300
| +213% | +$1.57M |
|
1957
CALL
PagerDuty
PD
$700M
| $2.17M | ﹤0.01% |
118,900
+20,300
| +21% | +$372K |
|
1958
CALL
TechnipFMC
FTI
$30.6B
| $2.17M | ﹤0.01% |
68,400
+20,500
| +43% | +$615K |
|
1959
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $2.17M | ﹤0.01% |
108,300
-101,100
| -48% | -$1.95M |
|
1960
DraftKings
DKNG
$11.4B
| $2.17M | ﹤0.01% |
+65,235
| New | +$2.68M |
|
1961
Oxford Industries
OXM
$577M
| $2.17M | ﹤0.01% |
36,922
+36,174
| +4,836% | +$2.6M |
|
1962
CALL
Acadia Healthcare
ACHC
$3.17B
| $2.16M | ﹤0.01% |
71,400
-10,900
| -13% | -$415K |
|
1963
CALL
Pagaya Technologies
PGY
$1.32B
| $2.16M | ﹤0.01% |
206,000
-162,500
| -44% | -$1.8M |
|
1964
CALL
Central Garden & Pet Co Class A
CENTA
$2.41B
| $2.15M | ﹤0.01% |
58,800
-8,100
| -12% | -$257K |
|
1965
Deere & Co
DE
$170B
| $2.14M | ﹤0.01% |
4,567
-401
| -8% | -$188K |
|
1966
HSBC
HSBC
$355B
| $2.14M | ﹤0.01% |
+37,320
| New | +$2.04M |
|
1967
PUT
Argan
AGX
$7.98B
| $2.14M | ﹤0.01% |
16,300
+8,600
| +112% | +$1.2M |
|
|
GOGL
1968
CALL
DELISTED
Golden Ocean Group
GOGL
| $2.13M | ﹤0.01% |
267,300
-8,600
| -3% | -$76.4K |
|
1969
CALL
Qfin Holdings
QFIN
$1.61B
| $2.13M | ﹤0.01% |
47,500
+26,600
| +127% | +$1.1M |
|
1970
CALL
Lennox International
LII
$18.8B
| $2.13M | ﹤0.01% |
3,800
+1,900
| +100% | +$1.15M |
|
1971
CALL
Scorpio Tankers
STNG
$3.96B
| $2.13M | ﹤0.01% |
56,700
-295,500
| -84% | -$13.2M |
|
1972
PUT
GlobalFoundries
GFS
$29.4B
| $2.13M | ﹤0.01% |
57,700
-48,500
| -46% | -$1.96M |
|
1973
CALL
Teladoc Health
TDOC
$1.58B
| $2.13M | ﹤0.01% |
267,400
-250,700
| -48% | -$2.54M |
|
1974
CALL
Virgin Galactic
SPCE
$320M
| $2.13M | ﹤0.01% |
727,200
-830,300
| -53% | -$3.64M |
|
|
WCC
1975
CALL
WESCO International
WCC
$16.2B
| $2.13M | ﹤0.01% |
13,700
-61,500
| -82% | -$11M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.