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 | |
|---|---|---|---|---|---|---|
1926
Fastenal
FAST
$54B
| $2.25M | ﹤0.01% |
+58,012
| New | +$2.17M |
|
1927
Emcor
EME
$33.1B
| $2.25M | ﹤0.01% |
+6,080
| New | +$2.63M |
|
1928
Halliburton
HAL
$27.9B
| $2.24M | ﹤0.01% |
88,479
-73,491
| -45% | -$1.93M |
|
1929
CALL
Fortuna Silver Mines
FSM
$2.59B
| $2.24M | ﹤0.01% |
367,600
+49,500
| +16% | +$246K |
|
1930
PUT
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $2.24M | ﹤0.01% |
69,900
+43,700
| +167% | +$773K |
|
|
CIVI
1931
PUT
DELISTED
Civitas Resources
CIVI
| $2.24M | ﹤0.01% |
64,200
+26,100
| +69% | +$1.16M |
|
1932
Colgate-Palmolive
CL
$72.6B
| $2.24M | ﹤0.01% |
+23,884
| New | +$2.14M |
|
1933
CALL
CoreCivic
CXW
$3.1B
| $2.24M | ﹤0.01% |
110,300
-104,400
| -49% | -$2.1M |
|
1934
CALL
Cal-Maine
CALM
$4.28B
| $2.24M | ﹤0.01% |
24,600
-3,100
| -11% | -$306K |
|
1935
PUT
Quanta Services
PWR
$93.9B
| $2.24M | ﹤0.01% |
8,800
-4,400
| -33% | -$1.27M |
|
1936
CALL
Coeur Mining
CDE
$15.6B
| $2.23M | ﹤0.01% |
377,200
+183,800
| +95% | +$1.13M |
|
1937
iShares MSCI Brazil ETF
EWZ
$9.05B
| $2.23M | ﹤0.01% |
86,347
-227,352
| -72% | -$5.66M |
|
1938
CALL
ACV Auctions
ACVA
$1.35B
| $2.23M | ﹤0.01% |
158,400
+152,000
| +2,375% | +$2.8M |
|
1939
PUT
Deutsche Bank
DB
$66.3B
| $2.23M | ﹤0.01% |
93,500
-3,400
| -4% | -$71.3K |
|
1940
PUT
DTE Energy
DTE
$31.1B
| $2.23M | ﹤0.01% |
16,100
+600
| +4% | +$76.6K |
|
1941
Bloom Energy
BE
$52.6B
| $2.23M | ﹤0.01% |
113,180
-112,721
| -50% | -$2.69M |
|
1942
PUT
Southern Copper
SCCO
$141B
| $2.22M | ﹤0.01% |
24,940
-13,693
| -35% | -$1.23M |
|
|
GRRR
1943
PUT
Gorilla Technology Group
GRRR
$333M
| $2.22M | ﹤0.01% |
74,900
+65,800
| +723% | +$1.49M |
|
1944
PUT
Central Garden & Pet Co Class A
CENTA
$2.41B
| $2.21M | ﹤0.01% |
60,400
-8,100
| -12% | -$257K |
|
1945
CALL
Hawaiian Electric Industries
HE
$2.33B
| $2.21M | ﹤0.01% |
202,000
+11,600
| +6% | +$117K |
|
1946
PUT
Grayscale Bitcoin Trust
GBTC
$9.64B
| $2.21M | ﹤0.01% |
33,900
-7,500
| -18% | -$553K |
|
|
VISN
1947
PUT
Vistance Networks Inc
VISN
$2.66B
| $2.21M | ﹤0.01% |
415,900
+145,300
| +54% | +$772K |
|
1948
PUT
Academy Sports + Outdoors
ASO
$2.89B
| $2.21M | ﹤0.01% |
48,400
-119,200
| -71% | -$6.12M |
|
1949
OneMain Financial
OMF
$6.9B
| $2.21M | ﹤0.01% |
45,130
+37,233
| +471% | +$1.97M |
|
1950
PUT
BCE
BCE
$19.9B
| $2.2M | ﹤0.01% |
95,900
+53,700
| +127% | +$1.26M |
|
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.