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 | |
|---|---|---|---|---|---|---|
|
ML
5676
DELISTED
MoneyLion Inc.
ML
| $55K | ﹤0.01% |
+641
| New | +$55.7K |
|
5677
CALL
AudioEye
AEYE
$72.3M
| $54K | ﹤0.01% |
4,900
-23,800
| -83% | -$359K |
|
5678
PUT
ARKO Corp
ARKO
$896M
| $54K | ﹤0.01% |
+13,800
| New | +$80.6K |
|
5679
Aurinia Pharmaceuticals
AUPH
$1.91B
| $54K | ﹤0.01% |
6,799
-44,196
| -87% | -$358K |
|
5680
PUT
Columbia Financial
CLBK
$1.12B
| $54K | ﹤0.01% |
3,600
+3,400
| +1,700% | +$52.7K |
|
5681
Clean Energy Fuels
CLNE
$427M
| $54K | ﹤0.01% |
34,995
-90,126
| -72% | -$229K |
|
5682
Cellectar Biosciences
CLRB
$20.5M
| $54K | ﹤0.01% |
5,771
+4,413
| +325% | +$40K |
|
5683
iShares 25+ Year Treasury STRIPS Bond ETF
GOVZ
$256M
| $54K | ﹤0.01% |
1,321
+1,141
| +634% | +$45.8K |
|
5684
PUT
Hess Midstream
HESM
$5.24B
| $54K | ﹤0.01% |
1,300
-2,300
| -64% | -$93.8K |
|
5685
PUT
Ingredion
INGR
$6.27B
| $54K | ﹤0.01% |
400
| – | – |
|
5686
CALL
Knowles
KN
$3.13B
| $54K | ﹤0.01% |
3,600
+3,400
| +1,700% | +$60.9K |
|
5687
PUT
Coca-Cola Femsa
KOF
$22.7B
| $54K | ﹤0.01% |
600
+300
| +100% | +$24.9K |
|
5688
CALL
CS Disco
LAW
$250M
| $54K | ﹤0.01% |
+13,300
| New | +$64.6K |
|
5689
OptimizeRx
OPRX
$114M
| $54K | ﹤0.01% |
6,351
-11,482
| -64% | -$70.2K |
|
5690
Peoples Bancorp
PEBO
$1.5B
| $54K | ﹤0.01% |
+1,840
| New | +$57.8K |
|
5691
PUT
Pulse Biosciences
PLSE
$2.43B
| $54K | ﹤0.01% |
3,400
+3,300
| +3,300% | +$61.5K |
|
5692
RCI Hospitality Holdings
RICK
$192M
| $54K | ﹤0.01% |
1,259
-4,942
| -80% | -$252K |
|
5693
PUT
The RMR Group
RMR
$325M
| $54K | ﹤0.01% |
3,300
+900
| +38% | +$16.5K |
|
|
RWT
5694
CALL
Redwood Trust
RWT
$574M
| $54K | ﹤0.01% |
8,900
+7,600
| +585% | +$48.7K |
|
|
BRDG
5695
PUT
DELISTED
Bridge Investment Group
BRDG
| $53K | ﹤0.01% |
5,600
-3,500
| -38% | -$30.5K |
|
5696
Cognyte Software
CGNT
$659M
| $53K | ﹤0.01% |
6,894
+3,790
| +122% | +$34.5K |
|
|
GTY
5697
CALL
Getty Realty Corp
GTY
$2.11B
| $53K | ﹤0.01% |
1,700
+400
| +31% | +$12.3K |
|
5698
CALL
iHeartMedia
IHRT
$543M
| $53K | ﹤0.01% |
32,300
-83,300
| -72% | -$168K |
|
5699
CALL
Immersion
IMMR
$251M
| $53K | ﹤0.01% |
7,000
-80,000
| -92% | -$656K |
|
5700
CALL
Motorcar Parts of America
MPAA
$254M
| $53K | ﹤0.01% |
+5,600
| New | +$48.9K |
|
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.