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 | |
|---|---|---|---|---|---|---|
4426
Intapp
INTA
$2.44B
| $185K | ﹤0.01% |
3,186
+2,199
| +223% | +$145K |
|
4427
PUT
Terex
TEX
$7.37B
| $185K | ﹤0.01% |
4,900
-800
| -14% | -$34.9K |
|
|
YALA
4428
PUT
Yalla Group
YALA
$814M
| $185K | ﹤0.01% |
35,500
-15,300
| -30% | -$65.8K |
|
4429
PUT
Palladyne AI
PDYN
$228M
| $185K | ﹤0.01% |
+31,500
| New | +$256K |
|
|
ROBN
4430
T-Rex 2X Long HOOD Daily Target ETF
ROBN
$86.4M
| $185K | ﹤0.01% |
+14,783
| New | +$292K |
|
|
DM
4431
DELISTED
Desktop Metal, Inc.
DM
| $185K | ﹤0.01% |
37,822
+29,793
| +371% | +$77.1K |
|
4432
CALL
Blend Labs
BLND
$438M
| $184K | ﹤0.01% |
55,000
-240,400
| -81% | -$874K |
|
4433
CALL
Grupo Cibest SA
CIB
$21.2B
| $184K | ﹤0.01% |
4,600
+2,000
| +77% | +$78.5K |
|
4434
PUT
Leonardo DRS
DRS
$12.4B
| $184K | ﹤0.01% |
5,600
+4,800
| +600% | +$158K |
|
4435
iShares Global Clean Energy ETF
ICLN
$2.22B
| $184K | ﹤0.01% |
16,117
-6,339
| -28% | -$72.3K |
|
4436
CALL
Ormat Technologies
ORA
$5.8B
| $184K | ﹤0.01% |
2,600
+1,900
| +271% | +$129K |
|
4437
CALL
Sensata Technologies
ST
$6.69B
| $184K | ﹤0.01% |
7,600
-197,500
| -96% | -$5.47M |
|
4438
PUT
Vera Therapeutics
VERA
$2.33B
| $184K | ﹤0.01% |
7,700
+100
| +1% | +$3.21K |
|
4439
CALL
Loar Holdings
LOAR
$6.23B
| $183K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$173K |
|
|
JBTM
4440
JBT Marel
JBTM
$7.35B
| $183K | ﹤0.01% |
+1,499
| New | +$190K |
|
4441
PUT
Arch Capital
ACGL
$36.5B
| $182K | ﹤0.01% |
1,900
-3,200
| -63% | -$295K |
|
4442
PUT
Adecoagro
AGRO
$1.4B
| $182K | ﹤0.01% |
+16,300
| New | +$167K |
|
4443
Microvision
MVIS
$84.8M
| $182K | ﹤0.01% |
+146,897
| New | +$205K |
|
4444
Target Hospitality
TH
$1.43B
| $182K | ﹤0.01% |
27,716
-38,227
| -58% | -$307K |
|
|
HOUS
4445
PUT
DELISTED
Anywhere Real Estate
HOUS
| $181K | ﹤0.01% |
54,600
+21,400
| +64% | +$75.8K |
|
|
INFA
4446
CALL
DELISTED
Informatica
INFA
| $181K | ﹤0.01% |
10,400
+2,400
| +30% | +$52.6K |
|
4447
PUT
Microvast
MVST
$237M
| $181K | ﹤0.01% |
154,900
-74,500
| -32% | -$129K |
|
4448
CALL
Reynolds Consumer Products
REYN
$5.42B
| $181K | ﹤0.01% |
7,600
+7,100
| +1,420% | +$179K |
|
|
SAND
4449
PUT
DELISTED
Sandstorm Gold
SAND
| $181K | ﹤0.01% |
24,100
-5,000
| -17% | -$31.2K |
|
|
LINE
4450
PUT
Lineage Inc
LINE
$10.1B
| $181K | ﹤0.01% |
+3,100
| New | +$181K |
|
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.