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 | |
|---|---|---|---|---|---|---|
|
CIO
6526
DELISTED
City Office REIT
CIO
| $21K | ﹤0.01% |
4,176
-3,818
| -48% | -$19.6K |
|
6527
CytomX Therapeutics
CTMX
$690M
| $21K | ﹤0.01% |
33,853
+33,346
| +6,577% | +$25.9K |
|
|
CVAC
6528
CALL
DELISTED
CureVac
CVAC
| $21K | ﹤0.01% |
7,800
-5,800
| -43% | -$20.2K |
|
6529
Covenant Logistics
CVLG
$1.04B
| $21K | ﹤0.01% |
+968
| New | +$24.9K |
|
6530
H.B. Fuller
FUL
$3B
| $21K | ﹤0.01% |
+375
| New | +$22.1K |
|
6531
PUT
Greif
GEF
$4.95B
| $21K | ﹤0.01% |
+400
| New | +$23.6K |
|
6532
CALL
GoPro
GPRO
$120M
| $21K | ﹤0.01% |
32,900
+19,600
| +147% | +$17.3K |
|
6533
Gran Tierra Energy
GTE
$236M
| $21K | ﹤0.01% |
4,379
-22,103
| -83% | -$127K |
|
6534
CALL
Hawkins
HWKN
$2.9B
| $21K | ﹤0.01% |
200
-1,200
| -86% | -$132K |
|
6535
PUT
Integra LifeSciences
IART
$1.28B
| $21K | ﹤0.01% |
+1,000
| New | +$23.5K |
|
6536
CALL
International General Insurance
IGIC
$1.19B
| $21K | ﹤0.01% |
800
-3,400
| -81% | -$86.2K |
|
6537
PUT
JELD-WEN Holding
JELD
$110M
| $21K | ﹤0.01% |
3,600
-600
| -14% | -$4.45K |
|
6538
PUT
Liquidity Services
LQDT
$1.2B
| $21K | ﹤0.01% |
700
-400
| -36% | -$13.3K |
|
6539
CALL
NanoViricides
NNVC
$39.3M
| $21K | ﹤0.01% |
18,300
-3,100
| -14% | -$3.93K |
|
6540
PUT
NET Power
NPWR
$120M
| $21K | ﹤0.01% |
8,000
+5,700
| +248% | +$40.2K |
|
6541
PUT
Oaktree Specialty Lending
OCSL
$1.05B
| $21K | ﹤0.01% |
1,400
-1,700
| -55% | -$26.7K |
|
|
OLO
6542
DELISTED
Olo Inc
OLO
| $21K | ﹤0.01% |
3,519
-9,992
| -74% | -$69.8K |
|
6543
PUT
OneWater Marine
ONEW
$211M
| $21K | ﹤0.01% |
+1,300
| New | +$22.2K |
|
|
PPSI
6544
CALL
Pioneer Power Solutions
PPSI
$30.8M
| $21K | ﹤0.01% |
7,100
-3,800
| -35% | -$13.8K |
|
6545
PUT
Rollins
ROL
$18.6B
| $21K | ﹤0.01% |
400
-100
| -20% | -$5.02K |
|
6546
CALL
Revvity
RVTY
$12.6B
| $21K | ﹤0.01% |
200
+100
| +100% | +$11.5K |
|
6547
CALL
Ryanair
RYAAY
$30B
| $21K | ﹤0.01% |
500
+300
| +150% | +$13.7K |
|
|
SAGE
6548
DELISTED
Sage Therapeutics
SAGE
| $21K | ﹤0.01% |
+2,647
| New | +$19.4K |
|
6549
CALL
SkinHealth Systems
SKIN
$83.4M
| $21K | ﹤0.01% |
16,400
-44,400
| -73% | -$67.7K |
|
6550
PUT
SLR Investment Corp
SLRC
$704M
| $21K | ﹤0.01% |
1,300
-4,600
| -78% | -$78.3K |
|
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.