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 | |
|---|---|---|---|---|---|---|
4651
CALL
Blink Charging
BLNK
$70.4M
| $145K | ﹤0.01% |
159,000
-236,100
| -60% | -$273K |
|
4652
PUT
Broadridge
BR
$17.9B
| $145K | ﹤0.01% |
+600
| New | +$141K |
|
4653
CALL
Hippo Holdings
HIPO
$830M
| $145K | ﹤0.01% |
5,700
+3,500
| +159% | +$97.1K |
|
4654
Host Hotels & Resorts
HST
$17.2B
| $145K | ﹤0.01% |
+10,265
| New | +$167K |
|
4655
VanEck Agribusiness ETF
MOO
$994M
| $145K | ﹤0.01% |
2,149
+1,186
| +123% | +$80.4K |
|
4656
Omega Healthcare
OHI
$15B
| $145K | ﹤0.01% |
+3,832
| New | +$143K |
|
4657
Planet Labs
PL
$7.21B
| $145K | ﹤0.01% |
43,104
-9,948
| -19% | -$46.6K |
|
4658
CALL
RCI Hospitality Holdings
RICK
$197M
| $145K | ﹤0.01% |
3,400
-300
| -8% | -$15.3K |
|
4659
Rackspace Technology
RXT
$1.07B
| $145K | ﹤0.01% |
86,188
+5,268
| +7% | +$12.6K |
|
4660
CALL
Seanergy Maritime Holdings
SHIP
$386M
| $145K | ﹤0.01% |
22,800
+21,000
| +1,167% | +$147K |
|
4661
Wayfair
W
$11.9B
| $145K | ﹤0.01% |
+4,550
| New | +$189K |
|
4662
CALL
InfraCap MLP ETF
AMZA
$467M
| $144K | ﹤0.01% |
4,100
+1,500
| +58% | +$70.4K |
|
4663
Brunswick
BC
$5.18B
| $144K | ﹤0.01% |
2,686
+2,579
| +2,410% | +$162K |
|
4664
CALL
Brookfield Infrastructure
BIPC
$5.24B
| $144K | ﹤0.01% |
4,000
+1,700
| +74% | +$66.9K |
|
|
4665
PUT
Brookfield Infrastructure
BIPC
$5.24B
| $144K | ﹤0.01% |
4,000
+1,300
| +48% | +$51.2K |
|
|
JFIN
4666
Jiayin Group
JFIN
$116M
| $144K | ﹤0.01% |
10,513
+5,965
| +131% | +$56.2K |
|
4667
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.45B
| $144K | ﹤0.01% |
11,300
+1,600
| +16% | +$20.6K |
|
4668
PUT
Rambus
RMBS
$9.72B
| $144K | ﹤0.01% |
2,800
-46,000
| -94% | -$2.7M |
|
4669
CALL
Butterfly Network
BFLY
$2.14B
| $143K | ﹤0.01% |
63,000
-33,200
| -35% | -$119K |
|
4670
PUT
Brookdale Senior Living
BKD
$3.49B
| $143K | ﹤0.01% |
22,900
+21,700
| +1,808% | +$116K |
|
4671
PUT
Coty
COTY
$2.37B
| $143K | ﹤0.01% |
26,300
+9,200
| +54% | +$57.6K |
|
4672
PUT
Encore Capital Group
ECPG
$2.02B
| $143K | ﹤0.01% |
+4,200
| New | +$183K |
|
4673
PUT
Ivanhoe Electric
IE
$1.48B
| $143K | ﹤0.01% |
24,700
+23,800
| +2,644% | +$151K |
|
4674
PUT
NeoGenomics
NEO
$2.04B
| $143K | ﹤0.01% |
+15,100
| New | +$189K |
|
4675
PUT
O'Reilly Automotive
ORLY
$72.4B
| $143K | ﹤0.01% |
1,500
-12,000
| -89% | -$1.04M |
|
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.