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 | |
|---|---|---|---|---|---|---|
5826
PUT
Hudbay
HBM
$10.1B
| $47K | ﹤0.01% |
6,300
+6,000
| +2,000% | +$48.9K |
|
|
HITI
5827
PUT
High Tide
HITI
$186M
| $47K | ﹤0.01% |
24,900
+4,800
| +24% | +$12.6K |
|
5828
iRadimed
IRMD
$1.16B
| $47K | ﹤0.01% |
907
+300
| +49% | +$16.9K |
|
5829
MiMedx Group
MDXG
$602M
| $47K | ﹤0.01% |
+6,294
| New | +$52.6K |
|
5830
PUT
MGP Ingredients
MGPI
$379M
| $47K | ﹤0.01% |
1,600
+600
| +60% | +$20.1K |
|
5831
PUT
Payoneer
PAYO
$2.42B
| $47K | ﹤0.01% |
6,500
-72,200
| -92% | -$673K |
|
5832
StoneX
SNEX
$9.26B
| $47K | ﹤0.01% |
+1,400
| New | +$47K |
|
5833
CALL
STAAR Surgical
STAA
$1.21B
| $47K | ﹤0.01% |
+2,700
| New | +$54.2K |
|
5834
PUT
Turning Point Brands
TPB
$1.45B
| $47K | ﹤0.01% |
800
+300
| +60% | +$18.6K |
|
5835
CALL
Voya Financial
VOYA
$9.01B
| $47K | ﹤0.01% |
+700
| New | +$49K |
|
5836
PUT
Xometry
XMTR
$4.74B
| $47K | ﹤0.01% |
1,900
+1,500
| +375% | +$47.1K |
|
5837
CALL
Zumiez
ZUMZ
$332M
| $47K | ﹤0.01% |
3,200
+1,400
| +78% | +$21.6K |
|
5838
Addus HomeCare
ADUS
$2.16B
| $46K | ﹤0.01% |
+474
| New | +$52.7K |
|
5839
CALL
Amalgamated Financial
AMAL
$1.47B
| $46K | ﹤0.01% |
1,600
-200
| -11% | -$6.54K |
|
5840
CALL
AngioDynamics
ANGO
$611M
| $46K | ﹤0.01% |
4,900
-1,500
| -23% | -$15.8K |
|
5841
PUT
Artisan Partners
APAM
$2.79B
| $46K | ﹤0.01% |
1,200
-1,300
| -52% | -$55.1K |
|
5842
PUT
Beazer Homes USA
BZH
$877M
| $46K | ﹤0.01% |
2,300
-40,100
| -95% | -$962K |
|
|
CGAU
5843
CALL
Centerra Gold
CGAU
$3.36B
| $46K | ﹤0.01% |
7,400
-8,800
| -54% | -$53.8K |
|
5844
CALL
ESAB
ESAB
$5.38B
| $46K | ﹤0.01% |
400
| – | – |
|
5845
PUT
Eton Pharmaceutcials
ETON
$1.27B
| $46K | ﹤0.01% |
+3,600
| New | +$54.4K |
|
5846
CALL
Fidus Investment
FDUS
$749M
| $46K | ﹤0.01% |
+2,300
| New | +$50.4K |
|
5847
CapForce IBD 50 ETF
FFTY
$79.5M
| $46K | ﹤0.01% |
+1,723
| New | +$50.5K |
|
5848
PUT
Horizon Technology Finance
HRZN
$295M
| $46K | ﹤0.01% |
4,900
+3,900
| +390% | +$36.6K |
|
5849
PUT
Intapp
INTA
$2.52B
| $46K | ﹤0.01% |
+800
| New | +$52.7K |
|
5850
JELD-WEN Holding
JELD
$122M
| $46K | ﹤0.01% |
7,776
+3,025
| +64% | +$22.5K |
|
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.