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 | |
|---|---|---|---|---|---|---|
6776
CALL
Bank of Marin Bancorp
BMRC
$471M
| $15K | ﹤0.01% |
700
-3,000
| -81% | -$71.2K |
|
6777
Blue Ridge Bankshares
BRBS
$322M
| $15K | ﹤0.01% |
4,613
-3,928
| -46% | -$13.4K |
|
6778
CALL
Cerus
CERS
$585M
| $15K | ﹤0.01% |
11,000
-90,400
| -89% | -$151K |
|
6779
CALL
Compugen
CGEN
$214M
| $15K | ﹤0.01% |
10,300
-400
| -4% | -$781 |
|
6780
PUT
Crane Co
CR
$13.1B
| $15K | ﹤0.01% |
100
-13,300
| -99% | -$2.13M |
|
6781
Daktronics
DAKT
$953M
| $15K | ﹤0.01% |
+1,313
| New | +$19.8K |
|
6782
VanEck Digital Transformation ETF
DAPP
$236M
| $15K | ﹤0.01% |
1,668
+626
| +60% | +$8.38K |
|
6783
Diana Shipping
DSX
$270M
| $15K | ﹤0.01% |
10,110
-19,996
| -66% | -$36.3K |
|
6784
PUT
Equitable Holdings
EQH
$13.5B
| $15K | ﹤0.01% |
300
-11,300
| -97% | -$592K |
|
6785
CALL
Flux Power
FLUX
$12.1M
| $15K | ﹤0.01% |
8,800
+7,800
| +780% | +$12.9K |
|
6786
First Industrial Realty Trust
FR
$8.77B
| $15K | ﹤0.01% |
+296
| New | +$16K |
|
6787
CALL
GeoPark
GPRK
$601M
| $15K | ﹤0.01% |
1,900
-1,300
| -41% | -$11.7K |
|
6788
PUT
Garrett Motion
GTX
$5.6B
| $15K | ﹤0.01% |
1,900
| – | – |
|
6789
CALL
KNOT Offshore Partners
KNOP
$352M
| $15K | ﹤0.01% |
2,200
-1,300
| -37% | -$7.51K |
|
6790
PUT
Laser Photonics
LASE
$52.2M
| $15K | ﹤0.01% |
5,100
-10,800
| -68% | -$45.3K |
|
6791
908 Devices
MASS
$288M
| $15K | ﹤0.01% |
3,516
-1,341
| -28% | -$3.97K |
|
6792
CALL
MasterCraft Boat Holdings
MCFT
$607M
| $15K | ﹤0.01% |
900
+100
| +13% | +$1.81K |
|
|
MTA
6793
PUT
Metalla Royalty & Streaming
MTA
$688M
| $15K | ﹤0.01% |
5,500
+1,800
| +49% | +$5.21K |
|
6794
Simplify MBS ETF
MTBA
$1.52B
| $15K | ﹤0.01% |
+300
| New | +$15K |
|
6795
Microvast
MVST
$256M
| $15K | ﹤0.01% |
+13,221
| New | +$23K |
|
6796
CALL
Myomo
MYO
$36.9M
| $15K | ﹤0.01% |
3,200
+1,700
| +113% | +$9.69K |
|
6797
Insperity
NSP
$2.01B
| $15K | ﹤0.01% |
+179
| New | +$14.9K |
|
|
OLPX
6798
DELISTED
Olaplex Holdings
OLPX
| $15K | ﹤0.01% |
12,495
-11,350
| -48% | -$16.8K |
|
6799
Oramed Pharmaceuticals
ORMP
$171M
| $15K | ﹤0.01% |
7,244
+3,387
| +88% | +$7.82K |
|
6800
CALL
Perma-Fix Environmental Services
PESI
$353M
| $15K | ﹤0.01% |
2,200
-6,100
| -73% | -$54.8K |
|
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.