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 | |
|---|---|---|---|---|---|---|
|
PPLT
5401
PUT
abrdn Physical Platinum Shares ETF
PPLT
$1.88B
| $73K | ﹤0.01% |
+8,000
| New | +$70.9K |
|
|
SF
5402
Stifel
SF
$12.6B
| $73K | ﹤0.01% |
+1,167
| New | +$82.3K |
|
|
SHCO
5403
CALL
DELISTED
Soho House & Co
SHCO
| $73K | ﹤0.01% |
11,900
-8,600
| -42% | -$62.2K |
|
5404
PUT
Televisa
TV
$1.48B
| $73K | ﹤0.01% |
42,000
| – | – |
|
5405
PUT
Zevia
ZVIA
$122M
| $73K | ﹤0.01% |
33,800
+22,600
| +202% | +$74K |
|
5406
CALL
Aegon
AEG
$14B
| $72K | ﹤0.01% |
11,000
+100
| +0.9% | +$639 |
|
5407
PUT
Alpha and Omega Semiconductor
AOSL
$950M
| $72K | ﹤0.01% |
2,900
-800
| -22% | -$26.8K |
|
|
CCC
5408
CALL
CCC Intelligent Solutions
CCC
$3.59B
| $72K | ﹤0.01% |
8,000
+7,800
| +3,900% | +$81K |
|
5409
Danaos Corp
DAC
$2.58B
| $72K | ﹤0.01% |
928
-2,066
| -69% | -$166K |
|
5410
StealthGas
GASS
$332M
| $72K | ﹤0.01% |
12,846
-2,444
| -16% | -$14K |
|
|
TDAY
5411
PUT
USA Today Co
TDAY
$1.27B
| $72K | ﹤0.01% |
25,000
+19,400
| +346% | +$81.1K |
|
5412
iHeartMedia
IHRT
$543M
| $72K | ﹤0.01% |
+43,915
| New | +$88.4K |
|
5413
Lloyds Banking Group
LYG
$89.5B
| $72K | ﹤0.01% |
19,077
+17,108
| +869% | +$56.6K |
|
5414
PUT
Neonode
NEON
$14.1M
| $72K | ﹤0.01% |
8,900
+6,900
| +345% | +$59.4K |
|
5415
CALL
Star Group
SGU
$412M
| $72K | ﹤0.01% |
5,500
+4,900
| +817% | +$61.3K |
|
5416
PUT
U-Haul Holding Co Series N
UHAL.B
$12.2B
| $72K | ﹤0.01% |
+1,200
| New | +$75.1K |
|
5417
CALL
Vontier
VNT
$4.52B
| $72K | ﹤0.01% |
+2,200
| New | +$80.1K |
|
5418
PUT
WPP
WPP
$4.36B
| $72K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$80.1K |
|
|
AIFC
5419
AI Financial Corp
AIFC
$57.6M
| $72K | ﹤0.01% |
+18,611
| New | +$103K |
|
|
OS
5420
PUT
DELISTED
OneStream Inc
OS
| $72K | ﹤0.01% |
+3,400
| New | +$87.2K |
|
|
TGR
5421
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $72K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$68.2K |
|
|
AHRT
5422
CALL
AH Realty Trust
AHRT
$529M
| $71K | ﹤0.01% |
9,500
+6,400
| +206% | +$58.1K |
|
5423
CALL
Black Diamond Therapeutics
BDTX
$96.8M
| $71K | ﹤0.01% |
46,000
+31,400
| +215% | +$65.8K |
|
|
BLD
5424
DELISTED
TopBuild
BLD
| $71K | ﹤0.01% |
234
+56
| +31% | +$17.9K |
|
5425
CALL
Energy Recovery
ERII
$446M
| $71K | ﹤0.01% |
4,500
+1,900
| +73% | +$28.9K |
|
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.