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 | |
|---|---|---|---|---|---|---|
5876
CALL
Quince Therapeutics
QNCX
$23.5M
| $45K | ﹤0.01% |
172
-79
| -31% | -$24.1K |
|
5877
Arcus Biosciences
RCUS
$3.52B
| $45K | ﹤0.01% |
5,764
+4,837
| +522% | +$56.1K |
|
5878
Sigma Lithium
SGML
$1.1B
| $45K | ﹤0.01% |
+4,420
| New | +$50.7K |
|
5879
PUT
Steris
STE
$22.3B
| $45K | ﹤0.01% |
+200
| New | +$44K |
|
5880
CALL
Triple Flag Precious Metals
TFPM
$5.95B
| $45K | ﹤0.01% |
2,400
+1,200
| +100% | +$20.5K |
|
5881
PUT
Upbound Group
UPBD
$1.13B
| $45K | ﹤0.01% |
+1,900
| New | +$52.2K |
|
|
UROY
5882
Uranium Royalty Corp
UROY
$1.28B
| $45K | ﹤0.01% |
+25,776
| New | +$55.2K |
|
5883
PUT
Westrock Coffee
WEST
$791M
| $45K | ﹤0.01% |
6,300
+5,500
| +688% | +$36K |
|
|
YETH
5884
Roundhill Ether Covered Call Strategy ETF
YETH
$59M
| $45K | ﹤0.01% |
1,715
+1,666
| +3,400% | +$67.8K |
|
|
ODVWW
5885
CALL
DELISTED
Osisko Development Corp. Warrant
ODVWW
| $45K | ﹤0.01% |
30,800
-22,800
| -43% | -$33.3K |
|
5886
CALL
Adecoagro
AGRO
$1.43B
| $44K | ﹤0.01% |
4,000
+3,100
| +344% | +$31.8K |
|
5887
CALL
ASE Group
ASX
$77.6B
| $44K | ﹤0.01% |
5,100
-21,600
| -81% | -$220K |
|
5888
CALL
Perspective Therapeutics
CATX
$331M
| $44K | ﹤0.01% |
20,700
+500
| +2% | +$1.5K |
|
5889
Camden Property Trust
CPT
$11B
| $44K | ﹤0.01% |
367
+86
| +31% | +$10.1K |
|
5890
Dream Finders Homes
DFH
$1.17B
| $44K | ﹤0.01% |
1,956
+1,592
| +437% | +$37.2K |
|
5891
PUT
Deluxe
DLX
$1.18B
| $44K | ﹤0.01% |
2,800
+300
| +12% | +$5.68K |
|
5892
PUT
EverQuote
EVER
$890M
| $44K | ﹤0.01% |
1,700
+1,600
| +1,600% | +$36.6K |
|
5893
PUT
Kimco Realty
KIM
$17.2B
| $44K | ﹤0.01% |
2,100
+600
| +40% | +$13.1K |
|
5894
PUT
Matthews International
MATW
$866M
| $44K | ﹤0.01% |
+2,000
| New | +$52K |
|
5895
MaxLinear
MXL
$6.07B
| $44K | ﹤0.01% |
4,138
-19,546
| -83% | -$327K |
|
5896
PUT
Neurocrine Biosciences
NBIX
$16.8B
| $44K | ﹤0.01% |
400
-1,200
| -75% | -$152K |
|
5897
Global X US Preferred ETF
PFFD
$2.15B
| $44K | ﹤0.01% |
2,361
+1,638
| +227% | +$32.2K |
|
5898
CALL
ProPetro Holding
PUMP
$1.36B
| $44K | ﹤0.01% |
6,100
-22,000
| -78% | -$191K |
|
5899
ProShares Short Financials
SEF
$13.1M
| $44K | ﹤0.01% |
1,290
+1,118
| +650% | +$38.4K |
|
5900
CALL
Sumitomo Mitsui Financial
SMFG
$165B
| $44K | ﹤0.01% |
2,900
+2,500
| +625% | +$38K |
|
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.