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 | |
|---|---|---|---|---|---|---|
1826
PennyMac Financial
PFSI
$4.38B
| $2.54M | ﹤0.01% |
25,331
+22,915
| +948% | +$2.35M |
|
1827
CALL
PureCycle Technologies
PCT
$1.17B
| $2.53M | ﹤0.01% |
366,300
-323,700
| -47% | -$2.91M |
|
1828
PUT
Kinross Gold
KGC
$28.5B
| $2.53M | ﹤0.01% |
200,400
-301,100
| -60% | -$3.38M |
|
1829
PUT
ArcelorMittal
MT
$50.4B
| $2.53M | ﹤0.01% |
87,600
-34,500
| -28% | -$951K |
|
1830
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $2.53M | ﹤0.01% |
85,100
+29,600
| +53% | +$898K |
|
1831
CALL
GeneDx Holdings
WGS
$1.75B
| $2.52M | ﹤0.01% |
28,500
+8,800
| +45% | +$763K |
|
1832
PUT
Veralto
VLTO
$22.6B
| $2.52M | ﹤0.01% |
25,900
-6,800
| -21% | -$679K |
|
|
VRNA
1833
CALL
DELISTED
Verona Pharma
VRNA
| $2.52M | ﹤0.01% |
39,700
+8,400
| +27% | +$502K |
|
1834
CALL
MakeMyTrip
MMYT
$4.67B
| $2.52M | ﹤0.01% |
25,700
+7,900
| +44% | +$815K |
|
1835
CALL
Insmed
INSM
$23.2B
| $2.52M | ﹤0.01% |
33,000
-58,900
| -64% | -$4.51M |
|
1836
CALL
Core & Main
CNM
$8.17B
| $2.52M | ﹤0.01% |
52,100
+21,900
| +73% | +$1.13M |
|
1837
CALL
Murphy Oil
MUR
$5.58B
| $2.51M | ﹤0.01% |
88,500
-14,800
| -14% | -$418K |
|
|
EH
1838
EHang Holdings
EH
$372M
| $2.51M | ﹤0.01% |
120,199
-61,660
| -34% | -$1.25M |
|
1839
PUT
Polaris
PII
$4.15B
| $2.51M | ﹤0.01% |
61,300
-28,900
| -32% | -$1.38M |
|
1840
CALL
Alight
ALIT
$497M
| $2.5M | ﹤0.01% |
21,110
+10,525
| +99% | +$1.38M |
|
1841
CALL
Gold Fields
GFI
$29.2B
| $2.5M | ﹤0.01% |
113,300
-61,100
| -35% | -$1.12M |
|
1842
YieldMax MSTR Option Income Strategy ETF
MSTY
$708M
| $2.5M | ﹤0.01% |
24,562
+4,217
| +21% | +$521K |
|
1843
CALL
Western Union
WU
$2.57B
| $2.5M | ﹤0.01% |
235,900
+33,200
| +16% | +$352K |
|
1844
PUT
Middleby
MIDD
$6.05B
| $2.49M | ﹤0.01% |
16,400
+12,300
| +300% | +$1.93M |
|
1845
PUT
Equinor
EQNR
$95.9B
| $2.49M | ﹤0.01% |
94,000
+65,400
| +229% | +$1.58M |
|
|
BTC
1846
PUT
Grayscale Bitcoin Mini Trust ETF
BTC
$3.4B
| $2.48M | ﹤0.01% |
68,000
+47,100
| +225% | +$1.94M |
|
1847
PUT
Glaukos
GKOS
$9.02B
| $2.48M | ﹤0.01% |
25,200
-11,200
| -31% | -$1.49M |
|
1848
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $2.47M | ﹤0.01% |
45,700
+400
| +0.9% | +$27.7K |
|
1849
PUT
Toronto Dominion Bank
TD
$198B
| $2.47M | ﹤0.01% |
41,200
-45,400
| -52% | -$2.64M |
|
|
PR
1850
PUT
Permian Resources
PR
$17.9B
| $2.47M | ﹤0.01% |
178,200
+43,700
| +32% | +$626K |
|
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.