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 | |
|---|---|---|---|---|---|---|
7001
Enact Holdings
ACT
$6.68B
| $11K | ﹤0.01% |
+326
| New | +$10.9K |
|
7002
CALL
American Homes 4 Rent
AMH
$12.1B
| $11K | ﹤0.01% |
300
-9,700
| -97% | -$346K |
|
7003
Ameresco
AMRC
$1.04B
| $11K | ﹤0.01% |
948
+732
| +339% | +$13.3K |
|
|
AMWD
7004
CALL
DELISTED
American Woodmark
AMWD
| $11K | ﹤0.01% |
200
-1,300
| -87% | -$92K |
|
7005
Artisan Partners
APAM
$2.93B
| $11K | ﹤0.01% |
293
-472
| -62% | -$20K |
|
7006
CALL
Atlas Lithium Corp
ATLX
$82M
| $11K | ﹤0.01% |
2,300
-5,800
| -72% | -$34.5K |
|
7007
PUT
Biomea Fusion
BMEA
$89.7M
| $11K | ﹤0.01% |
5,500
-79,300
| -94% | -$270K |
|
7008
BOK Financial
BOKF
$8.66B
| $11K | ﹤0.01% |
+106
| New | +$11.4K |
|
7009
BRC Inc
BRCC
$117M
| $11K | ﹤0.01% |
5,584
-57,621
| -91% | -$147K |
|
7010
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$103M
| $11K | ﹤0.01% |
+215
| New | +$10.8K |
|
7011
PUT
City Holding Co
CHCO
$2.04B
| $11K | ﹤0.01% |
+100
| New | +$11.8K |
|
7012
PUT
Collegium Pharmaceutical
COLL
$1.16B
| $11K | ﹤0.01% |
400
+200
| +100% | +$6.11K |
|
7013
Carriage Services
CSV
$647M
| $11K | ﹤0.01% |
300
-11,585
| -97% | -$460K |
|
7014
PUT
CVB Financial
CVBF
$4B
| $11K | ﹤0.01% |
600
+400
| +200% | +$7.97K |
|
7015
CALL
Ducommun
DCO
$2.74B
| $11K | ﹤0.01% |
+200
| New | +$12.6K |
|
7016
PUT
Dimensional US Core Equity Market ETF
DFAU
$12.3B
| $11K | ﹤0.01% |
+300
| New | +$12.2K |
|
7017
CALL
Douglas Elliman
DOUG
$160M
| $11K | ﹤0.01% |
6,700
-234,300
| -97% | -$424K |
|
7018
Electromed
ELMD
$334M
| $11K | ﹤0.01% |
474
-1,301
| -73% | -$38K |
|
7019
Fate Therapeutics
FATE
$273M
| $11K | ﹤0.01% |
+14,380
| New | +$17.6K |
|
7020
CALL
H.B. Fuller
FUL
$3.11B
| $11K | ﹤0.01% |
+200
| New | +$11.8K |
|
|
GOOD
7021
PUT
Gladstone Commercial Corp
GOOD
$628M
| $11K | ﹤0.01% |
800
-1,700
| -68% | -$26.8K |
|
7022
GrowGeneration
GRWG
$88.9M
| $11K | ﹤0.01% |
10,732
-49,059
| -82% | -$65.8K |
|
7023
PUT
Great Southern Bancorp
GSBC
$881M
| $11K | ﹤0.01% |
+200
| New | +$11.7K |
|
7024
HF Foods Group
HFFG
$87.2M
| $11K | ﹤0.01% |
2,377
+682
| +40% | +$1.86K |
|
7025
IonQ
IONQ
$12.7B
| $11K | ﹤0.01% |
+505
| New | +$16.4K |
|
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.