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 | |
|---|---|---|---|---|---|---|
1526
CALL
US Foods
USFD
$21.4B
| $3.65M | ﹤0.01% |
55,700
+41,300
| +287% | +$2.82M |
|
1527
NuScale Power
SMR
$2.8B
| $3.63M | ﹤0.01% |
256,248
+25,463
| +11% | +$515K |
|
1528
AES
AES
$10.6B
| $3.63M | ﹤0.01% |
291,962
+66,724
| +30% | +$772K |
|
1529
CALL
Travelers Companies
TRV
$80.8B
| $3.62M | ﹤0.01% |
13,700
-40,800
| -75% | -$10.2M |
|
1530
PUT
Credo Technology Group
CRDO
$39.7B
| $3.61M | ﹤0.01% |
89,900
-4,500
| -5% | -$280K |
|
1531
PUT
Tencent Music
TME
$14.5B
| $3.6M | ﹤0.01% |
249,900
+135,700
| +119% | +$1.69M |
|
1532
Danaher
DHR
$135B
| $3.6M | ﹤0.01% |
17,549
-43,915
| -71% | -$9.59M |
|
1533
CALL
Solventum
SOLV
$13.5B
| $3.59M | ﹤0.01% |
47,200
+34,000
| +258% | +$2.53M |
|
|
XIFR
1534
PUT
XPLR Infrastructure LP
XIFR
$1.18B
| $3.59M | ﹤0.01% |
377,600
+89,600
| +31% | +$1.02M |
|
|
CYBR
1535
CALL
DELISTED
CyberArk
CYBR
| $3.58M | ﹤0.01% |
10,600
+2,200
| +26% | +$791K |
|
1536
PUT
Vodafone
VOD
$34.9B
| $3.58M | ﹤0.01% |
382,300
-32,500
| -8% | -$285K |
|
1537
CALL
Intuitive Machines
LUNR
$2.07B
| $3.58M | ﹤0.01% |
480,000
-611,700
| -56% | -$9.62M |
|
1538
PUT
Murphy Oil
MUR
$5.58B
| $3.56M | ﹤0.01% |
125,400
+11,900
| +10% | +$336K |
|
|
PPLI
1539
PUT
People Inc
PPLI
$3.1B
| $3.56M | ﹤0.01% |
94,473
+79,357
| +525% | +$2.89M |
|
1540
PUT
Brown-Forman Class B
BF.B
$12B
| $3.56M | ﹤0.01% |
104,900
+54,500
| +108% | +$1.84M |
|
1541
CleanSpark
CLSK
$3.73B
| $3.56M | ﹤0.01% |
529,643
-457,439
| -46% | -$4.33M |
|
1542
Enovix
ENVX
$862M
| $3.55M | ﹤0.01% |
553,426
+353,765
| +177% | +$3.15M |
|
1543
PUT
Duolingo
DUOL
$5.7B
| $3.54M | ﹤0.01% |
11,400
-7,600
| -40% | -$2.6M |
|
1544
CALL
Canadian National Railway
CNI
$78.5B
| $3.52M | ﹤0.01% |
36,100
+7,500
| +26% | +$758K |
|
1545
CALL
Booz Allen Hamilton
BAH
$8.7B
| $3.51M | ﹤0.01% |
33,600
+11,300
| +51% | +$1.36M |
|
1546
CALL
Arvinas
ARVN
$518M
| $3.51M | ﹤0.01% |
500,200
+371,100
| +287% | +$5.82M |
|
1547
PUT
SBA Communications
SBAC
$18.4B
| $3.5M | ﹤0.01% |
15,900
+13,900
| +695% | +$2.91M |
|
1548
Vistra
VST
$55.1B
| $3.49M | ﹤0.01% |
29,711
+900
| +3% | +$134K |
|
1549
PUT
Blue Owl Capital
OWL
$6.39B
| $3.47M | ﹤0.01% |
173,400
+78,800
| +83% | +$1.77M |
|
1550
CALL
Aurora
AUR
$11.7B
| $3.47M | ﹤0.01% |
515,400
+29,700
| +6% | +$213K |
|
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.