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 | |
|---|---|---|---|---|---|---|
5801
Imperial Petroleum
IMPP
$213M
| $48K | ﹤0.01% |
19,950
-147,916
| -88% | -$410K |
|
5802
CALL
Lineage Cell Therapeutics
LCTX
$269M
| $48K | ﹤0.01% |
+106,400
| New | +$62.4K |
|
5803
CALL
Vitamin Cottage Natural Grocers
NGVC
$739M
| $48K | ﹤0.01% |
1,200
+200
| +20% | +$8.37K |
|
|
NIU
5804
CALL
Niu Technologies
NIU
$203M
| $48K | ﹤0.01% |
+11,900
| New | +$29.6K |
|
|
OLO
5805
PUT
DELISTED
Olo Inc
OLO
| $48K | ﹤0.01% |
8,000
-2,000
| -20% | -$14K |
|
5806
Ondas Inc
ONDS
$4.27B
| $48K | ﹤0.01% |
45,687
-21,383
| -32% | -$32K |
|
5807
CALL
RLI Corp
RLI
$5.62B
| $48K | ﹤0.01% |
+600
| New | +$45.7K |
|
5808
CALL
Scholar Rock
SRRK
$5.67B
| $48K | ﹤0.01% |
1,500
-11,300
| -88% | -$435K |
|
5809
Sasol
SSL
$7.5B
| $48K | ﹤0.01% |
11,505
-3,286
| -22% | -$14.9K |
|
5810
PUT
Shutterstock
SSTK
$198M
| $48K | ﹤0.01% |
2,600
-3,100
| -54% | -$79.4K |
|
5811
Taboola.com
TBLA
$1.37B
| $48K | ﹤0.01% |
16,591
-45,836
| -73% | -$157K |
|
5812
Teucrium Agricultural Strategy No K-1 ETF
TILL
$36.7M
| $48K | ﹤0.01% |
2,585
+2,125
| +462% | +$40.6K |
|
|
UROY
5813
CALL
Uranium Royalty Corp
UROY
$1.3B
| $48K | ﹤0.01% |
27,300
-108,300
| -80% | -$232K |
|
5814
PUT
WD-40
WDFC
$3.05B
| $48K | ﹤0.01% |
200
-1,100
| -85% | -$260K |
|
5815
State Street SPDR S&P Software & Services ETF
XSW
$442M
| $48K | ﹤0.01% |
+304
| New | +$55.5K |
|
5816
CALL
ABM Industries
ABM
$2.81B
| $47K | ﹤0.01% |
1,000
-200
| -17% | -$10.3K |
|
5817
PUT
Aegon
AEG
$14B
| $47K | ﹤0.01% |
7,200
+4,100
| +132% | +$26.2K |
|
5818
CALL
American States Water
AWR
$3.36B
| $47K | ﹤0.01% |
+600
| New | +$45.2K |
|
5819
PUT
BJ's Restaurants
BJRI
$1.42B
| $47K | ﹤0.01% |
1,400
+900
| +180% | +$31.9K |
|
|
BRAG
5820
Bragg Gaming Group
BRAG
$50.6M
| $47K | ﹤0.01% |
11,678
+4,303
| +58% | +$19.7K |
|
5821
CALL
Corporacion America
CAAP
$4.21B
| $47K | ﹤0.01% |
2,600
-26,400
| -91% | -$499K |
|
5822
PUT
Crescent Capital BDC
CCAP
$403M
| $47K | ﹤0.01% |
2,800
+1,800
| +180% | +$33.5K |
|
5823
CALL
CryoPort
CYRX
$761M
| $47K | ﹤0.01% |
7,800
-62,900
| -89% | -$435K |
|
5824
Forestar Group
FOR
$1.44B
| $47K | ﹤0.01% |
+2,232
| New | +$51.9K |
|
|
GB
5825
DELISTED
Global Blue Group Holding
GB
| $47K | ﹤0.01% |
6,410
+893
| +16% | +$6.46K |
|
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.