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 | |
|---|---|---|---|---|---|---|
2301
CALL
Freshworks
FRSH
$2.84B
| $1.51M | ﹤0.01% |
106,900
+13,300
| +14% | +$223K |
|
2302
PUT
Lear
LEA
$7.19B
| $1.51M | ﹤0.01% |
17,100
-8,300
| -33% | -$788K |
|
2303
CALL
Nano X Imaging
NNOX
$62.4M
| $1.51M | ﹤0.01% |
302,000
-78,500
| -21% | -$543K |
|
2304
CALL
Arcutis Biotherapeutics
ARQT
$3.42B
| $1.51M | ﹤0.01% |
96,400
+25,900
| +37% | +$365K |
|
2305
CALL
AvePoint
AVPT
$2.6B
| $1.51M | ﹤0.01% |
104,300
-46,600
| -31% | -$783K |
|
2306
PUT
Organon & Co
OGN
$3.55B
| $1.51M | ﹤0.01% |
101,200
-17,600
| -15% | -$271K |
|
2307
CALL
Wendy's
WEN
$1.33B
| $1.51M | ﹤0.01% |
103,000
+21,000
| +26% | +$316K |
|
2308
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.5M | ﹤0.01% |
37,900
+8,600
| +29% | +$345K |
|
2309
CALL
Teekay Tankers
TNK
$2.63B
| $1.5M | ﹤0.01% |
39,300
+31,200
| +385% | +$1.26M |
|
2310
CALL
EPAM Systems
EPAM
$4.69B
| $1.5M | ﹤0.01% |
8,900
+900
| +11% | +$198K |
|
2311
MarketAxess Holdings
MKTX
$4.15B
| $1.5M | ﹤0.01% |
6,943
+6,246
| +896% | +$1.31M |
|
2312
CALL
Ameriprise Financial
AMP
$46.8B
| $1.5M | ﹤0.01% |
3,100
+1,100
| +55% | +$577K |
|
|
DOCU
2313
DocuSign
DOCU
$9.63B
| $1.5M | ﹤0.01% |
+18,425
| New | +$1.61M |
|
2314
PUT
Philips
PHG
$25.4B
| $1.5M | ﹤0.01% |
63,779
+31,133
| +95% | +$762K |
|
2315
CALL
Toro Company
TTC
$8.93B
| $1.5M | ﹤0.01% |
20,600
+18,300
| +796% | +$1.45M |
|
2316
CALL
Viatris
VTRS
$20.1B
| $1.5M | ﹤0.01% |
171,900
+57,300
| +50% | +$602K |
|
2317
Invesco KBW Bank ETF
KBWB
$7.08B
| $1.5M | ﹤0.01% |
23,837
+18,247
| +326% | +$1.23M |
|
2318
CALL
Manulife Financial
MFC
$72.6B
| $1.5M | ﹤0.01% |
48,000
-95,500
| -67% | -$2.89M |
|
2319
PUT
Mineralys Therapeutics
MLYS
$2.35B
| $1.49M | ﹤0.01% |
94,100
+93,400
| +13,343% | +$1.07M |
|
|
K
2320
CALL
DELISTED
Kellanova
K
| $1.49M | ﹤0.01% |
18,100
-5,000
| -22% | -$411K |
|
|
MOMO
2321
Hello Group
MOMO
$869M
| $1.49M | ﹤0.01% |
+236,558
| New | +$1.71M |
|
2322
PUT
Norfolk Southern
NSC
$78.8B
| $1.49M | ﹤0.01% |
6,300
-21,900
| -78% | -$5.34M |
|
|
PR
2323
Permian Resources
PR
$17.9B
| $1.49M | ﹤0.01% |
+107,615
| New | +$1.54M |
|
|
EXAS
2324
PUT
DELISTED
Exact Sciences
EXAS
| $1.49M | ﹤0.01% |
34,400
-52,700
| -61% | -$2.67M |
|
|
CHGX
2325
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $1.49M | ﹤0.01% |
32,200
-75,500
| -70% | -$2.9M |
|
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.