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 | |
|---|---|---|---|---|---|---|
6051
Ocean Power Technologies
OPTT
$43.5M
| $38K | ﹤0.01% |
+84,616
| New | +$60.8K |
|
6052
CALL
Sun Communities
SUI
$15.3B
| $38K | ﹤0.01% |
300
+100
| +50% | +$12.8K |
|
6053
SurgePays
SURG
$5.43M
| $38K | ﹤0.01% |
18,697
+14,773
| +376% | +$21.8K |
|
6054
Tootsie Roll Industries
TR
$2.96B
| $38K | ﹤0.01% |
+1,263
| New | +$37.6K |
|
6055
CALL
United States Gasoline Fund
UGA
$142M
| $38K | ﹤0.01% |
600
-65,300
| -99% | -$4.13M |
|
6056
ProShares Ultra Financials
UYG
$829M
| $38K | ﹤0.01% |
437
-3,390
| -89% | -$309K |
|
6057
Workiva
WK
$3.29B
| $38K | ﹤0.01% |
+503
| New | +$47.5K |
|
6058
CALL
Alignment Healthcare
ALHC
$3.85B
| $37K | ﹤0.01% |
2,000
-38,200
| -95% | -$570K |
|
6059
PUT
AtaiBeckley Inc
ATAI
$2.66B
| $37K | ﹤0.01% |
27,300
+26,100
| +2,175% | +$43.9K |
|
6060
PUT
United States Brent Oil Fund
BNO
$770M
| $37K | ﹤0.01% |
1,200
-1,100
| -48% | -$33.7K |
|
6061
CALL
C4 Therapeutics
CCCC
$405M
| $37K | ﹤0.01% |
23,300
+22,700
| +3,783% | +$67.7K |
|
6062
First Trust SkyBridge Crypto Industry and Digital Economy ETF
CRPT
$85.2M
| $37K | ﹤0.01% |
3,044
+1,827
| +150% | +$29.8K |
|
|
CVAC
6063
DELISTED
CureVac
CVAC
| $37K | ﹤0.01% |
13,476
+6,076
| +82% | +$21.1K |
|
6064
CALL
First Interstate BancSystem
FIBK
$3.74B
| $37K | ﹤0.01% |
1,300
| – | – |
|
6065
CALL
International Money Express
IMXI
$394M
| $37K | ﹤0.01% |
3,000
-300
| -9% | -$5.13K |
|
6066
PUT
SEALSQ Corp
LAES
$526M
| $37K | ﹤0.01% |
+14,400
| New | +$53.8K |
|
6067
Direxion Daily MSCI Mexico Bull 3X ETF
MEXX
$20M
| $37K | ﹤0.01% |
3,443
+2,856
| +487% | +$31.5K |
|
6068
PUT
Global X MSCI Norway ETF
NORW
$87.3M
| $37K | ﹤0.01% |
600
+200
| +50% | +$5.08K |
|
6069
PUT
NetSol Technologies
NTWK
$50.8M
| $37K | ﹤0.01% |
15,300
-28,500
| -65% | -$72.2K |
|
6070
CALL
Red Violet
RDVT
$964M
| $37K | ﹤0.01% |
1,000
| – | – |
|
6071
The RMR Group
RMR
$333M
| $37K | ﹤0.01% |
2,275
-54
| -2% | -$993 |
|
6072
CALL
Senseonics Holdings Inc
SENS
$265M
| $37K | ﹤0.01% |
2,870
-1,860
| -39% | -$30.7K |
|
6073
E.W. Scripps
SSP
$259M
| $37K | ﹤0.01% |
12,760
-8,315
| -39% | -$18.2K |
|
6074
CALL
CVR Partners
UAN
$1.35B
| $37K | ﹤0.01% |
500
-48,000
| -99% | -$3.75M |
|
|
6075
PUT
Workiva
WK
$3.29B
| $37K | ﹤0.01% |
500
| – | – |
|
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.