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 | |
|---|---|---|---|---|---|---|
3101
CALL
Coursera
COUR
$1.62B
| $654K | ﹤0.01% |
98,200
-25,900
| -21% | -$206K |
|
3102
CALL
Beyond Meat
BYND
$286M
| $653K | ﹤0.01% |
214,300
+49,300
| +30% | +$181K |
|
|
HUT
3103
Hut 8
HUT
$11.5B
| $653K | ﹤0.01% |
+56,241
| New | +$1.04M |
|
3104
MakeMyTrip
MMYT
$4.93B
| $652K | ﹤0.01% |
+6,663
| New | +$688K |
|
3105
CALL
Orion
OEC
$380M
| $652K | ﹤0.01% |
50,500
+49,800
| +7,114% | +$704K |
|
3106
Amplify Energy
AMPY
$157M
| $651K | ﹤0.01% |
+174,136
| New | +$868K |
|
|
TPH
3107
CALL
DELISTED
Tri Pointe Homes
TPH
| $651K | ﹤0.01% |
20,400
+11,700
| +134% | +$399K |
|
3108
BlackBerry
BB
$4.91B
| $650K | ﹤0.01% |
172,450
-11,940
| -6% | -$54.4K |
|
3109
CALL
ChargePoint
CHPT
$135M
| $650K | ﹤0.01% |
53,750
-45,010
| -46% | -$750K |
|
3110
CALL
Donaldson
DCI
$10.7B
| $650K | ﹤0.01% |
9,700
+9,400
| +3,133% | +$650K |
|
3111
PUT
Melco Resorts & Entertainment
MLCO
$2.17B
| $650K | ﹤0.01% |
123,500
-10,500
| -8% | -$59.1K |
|
3112
Vermilion Energy
VET
$1.64B
| $649K | ﹤0.01% |
80,178
+22,839
| +40% | +$204K |
|
3113
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $649K | ﹤0.01% |
9,600
-2,400
| -20% | -$140K |
|
3114
CALL
Xerox
XRX
$357M
| $649K | ﹤0.01% |
134,400
-73,900
| -35% | -$555K |
|
|
CIVI
3115
DELISTED
Civitas Resources
CIVI
| $647K | ﹤0.01% |
+18,548
| New | +$821K |
|
3116
CALL
Marten Transport
MRTN
$1.25B
| $647K | ﹤0.01% |
+47,200
| New | +$702K |
|
3117
Invesco DB US Dollar Index Bullish Fund
UUP
$426M
| $646K | ﹤0.01% |
+22,649
| New | +$658K |
|
3118
CALL
Gulfport Energy Corp
GPOR
$2.79B
| $644K | ﹤0.01% |
3,500
+3,200
| +1,067% | +$581K |
|
3119
CALL
Newell Brands
NWL
$2.23B
| $644K | ﹤0.01% |
103,900
-38,900
| -27% | -$312K |
|
3120
PUT
Amer Sports
AS
$20.6B
| $644K | ﹤0.01% |
24,100
-40,900
| -63% | -$1.21M |
|
|
FFAI
3121
PUT
Faraday Future Intelligent Electric
FFAI
$13.3M
| $644K | ﹤0.01% |
3,801
+734
| +24% | +$165K |
|
3122
CALL
uniQure
QURE
$2.65B
| $643K | ﹤0.01% |
60,700
-139,700
| -70% | -$1.96M |
|
3123
Telesat
TSAT
$566M
| $643K | ﹤0.01% |
34,178
+13,032
| +62% | +$249K |
|
3124
CALL
Herbalife
HLF
$1.26B
| $642K | ﹤0.01% |
74,500
-1,300
| -2% | -$9.25K |
|
3125
Viatris
VTRS
$20.4B
| $641K | ﹤0.01% |
73,690
-79,349
| -52% | -$833K |
|
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.