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 | |
|---|---|---|---|---|---|---|
4251
CALL
Intrepid Potash
IPI
$476M
| $214K | ﹤0.01% |
7,300
+5,500
| +306% | +$145K |
|
4252
CALL
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $214K | ﹤0.01% |
4,000
-3,400
| -46% | -$170K |
|
4253
Equinor
EQNR
$97.3B
| $213K | ﹤0.01% |
+8,057
| New | +$195K |
|
4254
CALL
OneSpan
OSPN
$584M
| $213K | ﹤0.01% |
14,000
+6,700
| +92% | +$119K |
|
4255
Invesco DB US Dollar Index Bearish Fund
UDN
$108M
| $213K | ﹤0.01% |
12,176
+6,684
| +122% | +$114K |
|
4256
CALL
Frontier Group Holdings
ULCC
$1.49B
| $213K | ﹤0.01% |
49,100
-36,900
| -43% | -$275K |
|
|
EU
4257
CALL
enCore Energy
EU
$206M
| $212K | ﹤0.01% |
154,800
+93,200
| +151% | +$240K |
|
4258
CALL
UMB Financial
UMBF
$11.3B
| $212K | ﹤0.01% |
+2,100
| New | +$232K |
|
4259
New Oriental
EDU
$9.32B
| $211K | ﹤0.01% |
4,430
+3,677
| +488% | +$189K |
|
|
ESPR
4260
DELISTED
Esperion Therapeutics
ESPR
| $211K | ﹤0.01% |
+146,741
| New | +$270K |
|
4261
PUT
Forestar Group
FOR
$1.48B
| $211K | ﹤0.01% |
+10,000
| New | +$233K |
|
|
GDEN
4262
CALL
DELISTED
Golden Entertainment
GDEN
| $211K | ﹤0.01% |
8,000
-23,000
| -74% | -$708K |
|
4263
CALL
Prothena Corp
PRTA
$448M
| $211K | ﹤0.01% |
17,100
-31,000
| -64% | -$438K |
|
4264
Global X NASDAQ-100 Covered Call ETF
QYLD
$7.88B
| $211K | ﹤0.01% |
+12,702
| New | +$228K |
|
4265
CALL
Sana Biotechnology
SANA
$882M
| $211K | ﹤0.01% |
126,000
-171,100
| -58% | -$478K |
|
4266
Cboe Global Markets
CBOE
$32.2B
| $210K | ﹤0.01% |
+929
| New | +$193K |
|
4267
Compass Minerals
CMP
$1.23B
| $210K | ﹤0.01% |
22,660
+1,881
| +9% | +$21.5K |
|
|
DQ
4268
Daqo New Energy
DQ
$810M
| $210K | ﹤0.01% |
11,603
+4,229
| +57% | +$82.8K |
|
4269
CALL
Landstar System
LSTR
$6.03B
| $210K | ﹤0.01% |
+1,400
| New | +$226K |
|
4270
CALL
Omeros
OMER
$845M
| $210K | ﹤0.01% |
25,600
-77,300
| -75% | -$682K |
|
|
CRESY
4271
Cresud
CRESY
$806M
| $209K | ﹤0.01% |
19,089
+6,884
| +56% | +$79.9K |
|
4272
CALL
Houlihan Lokey
HLI
$9.72B
| $209K | ﹤0.01% |
+1,300
| New | +$223K |
|
4273
Hexcel
HXL
$7.97B
| $209K | ﹤0.01% |
3,832
+3,654
| +2,053% | +$228K |
|
4274
PUT
Polestar Automotive Holding UK
PSNY
$1.97B
| $209K | ﹤0.01% |
6,643
+5,273
| +385% | +$174K |
|
4275
PUT
Simmons First National
SFNC
$3.39B
| $209K | ﹤0.01% |
+10,200
| New | +$221K |
|
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.