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 | |
|---|---|---|---|---|---|---|
3126
CMS Energy
CMS
$22.9B
| $640K | ﹤0.01% |
+8,522
| New | +$595K |
|
|
HIVE
3127
CALL
HIVE Digital Technologies
HIVE
$778M
| $640K | ﹤0.01% |
441,900
-70,200
| -14% | -$173K |
|
3128
CALL
M/I Homes
MHO
$3.83B
| $639K | ﹤0.01% |
5,600
-5,200
| -48% | -$638K |
|
3129
PUT
Opendoor
OPEN
$3.66B
| $639K | ﹤0.01% |
647,487
-574,120
| -47% | -$754K |
|
3130
CALL
Tyler Technologies
TYL
$13.2B
| $639K | ﹤0.01% |
1,100
+600
| +120% | +$356K |
|
3131
CALL
Dorman Products
DORM
$4.06B
| $638K | ﹤0.01% |
5,300
-2,200
| -29% | -$281K |
|
|
FYBR
3132
PUT
DELISTED
Frontier Communications
FYBR
| $638K | ﹤0.01% |
17,800
-17,400
| -49% | -$622K |
|
3133
CALL
Protagonist Therapeutics
PTGX
$8.75B
| $638K | ﹤0.01% |
13,200
+12,400
| +1,550% | +$520K |
|
3134
CALL
BGC Group
BGC
$5.57B
| $636K | ﹤0.01% |
69,400
+9,800
| +16% | +$91.9K |
|
3135
CALL
Trinity Capital
TRIN
$1.56B
| $633K | ﹤0.01% |
41,800
+25,200
| +152% | +$392K |
|
3136
CALL
BBVA Argentina
BBAR
$3.91B
| $632K | ﹤0.01% |
34,900
-800
| -2% | -$16.3K |
|
|
BBBY
3137
CALL
Bed Bath & Beyond
BBBY
$495M
| $632K | ﹤0.01% |
119,900
-88,550
| -42% | -$537K |
|
3138
CALL
NeoGenomics
NEO
$1.74B
| $632K | ﹤0.01% |
66,600
-8,700
| -12% | -$109K |
|
3139
PUT
Q2 Holdings
QTWO
$3.66B
| $632K | ﹤0.01% |
7,900
+7,300
| +1,217% | +$644K |
|
3140
PUT
Silicon Motion
SIMO
$8.25B
| $632K | ﹤0.01% |
12,500
-2,300
| -16% | -$124K |
|
3141
PUT
Banco Bradesco
BBD
$38.4B
| $631K | ﹤0.01% |
283,200
-59,900
| -17% | -$124K |
|
|
PBT
3142
Permian Basin Royalty Trust
PBT
$1.32B
| $631K | ﹤0.01% |
63,679
+41,817
| +191% | +$454K |
|
3143
Qiagen
QGEN
$8.54B
| $631K | ﹤0.01% |
15,733
+5,093
| +48% | +$214K |
|
3144
CALL
Kodiak Gas Services
KGS
$5.81B
| $630K | ﹤0.01% |
16,900
+12,200
| +260% | +$520K |
|
3145
PUT
Compass Therapeutics
CMPX
$380M
| $629K | ﹤0.01% |
+331,300
| New | +$881K |
|
3146
CALL
Morningstar
MORN
$6.99B
| $629K | ﹤0.01% |
2,100
+2,000
| +2,000% | +$630K |
|
3147
CALL
United Natural Foods
UNFI
$2.98B
| $629K | ﹤0.01% |
23,000
-34,000
| -60% | -$985K |
|
3148
CALL
Gates Industrial Corporation Ltd.
GTES
$6.57B
| $627K | ﹤0.01% |
34,100
+33,600
| +6,720% | +$693K |
|
3149
Tetra Tech
TTEK
$8.32B
| $627K | ﹤0.01% |
+21,451
| New | +$720K |
|
3150
CALL
Global X MSCI Norway ETF
NORW
$85.1M
| $626K | ﹤0.01% |
8,700
+7,200
| +480% | +$183K |
|
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.