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 | |
|---|---|---|---|---|---|---|
1476
Celsius Holdings
CELH
$6.89B
| $3.87M | ﹤0.01% |
108,690
-428,404
| -80% | -$11.7M |
|
1477
CALL
Woodward
WWD
$24.9B
| $3.87M | ﹤0.01% |
21,200
+13,200
| +165% | +$2.44M |
|
1478
PUT
Viking Therapeutics
VKTX
$4.05B
| $3.87M | ﹤0.01% |
160,100
-6,400
| -4% | -$202K |
|
1479
CALL
RUM Group Inc
RUM
$1.58B
| $3.85M | ﹤0.01% |
545,400
-131,700
| -19% | -$1.37M |
|
1480
PUT
Zions Bancorporation
ZION
$10.1B
| $3.84M | ﹤0.01% |
77,100
-53,100
| -41% | -$2.86M |
|
1481
PUT
Restaurant Brands International
QSR
$25.2B
| $3.84M | ﹤0.01% |
57,600
-47,400
| -45% | -$3.06M |
|
1482
CALL
Ecolab
ECL
$75.4B
| $3.83M | ﹤0.01% |
15,100
-9,200
| -38% | -$2.32M |
|
1483
CALL
Carlyle Group
CG
$16.3B
| $3.83M | ﹤0.01% |
87,800
-230,100
| -72% | -$11.4M |
|
1484
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$864M
| $3.83M | ﹤0.01% |
73,900
+43,300
| +142% | +$2.05M |
|
1485
CALL
Citizens Financial Group
CFG
$30.4B
| $3.81M | ﹤0.01% |
93,100
-44,100
| -32% | -$1.97M |
|
1486
PUT
Lincoln National
LNC
$7.91B
| $3.81M | ﹤0.01% |
106,100
-203,400
| -66% | -$7.22M |
|
1487
CALL
Franklin Resources
BEN
$16.9B
| $3.8M | ﹤0.01% |
197,200
-40,600
| -17% | -$814K |
|
1488
CALL
Consolidated Edison
ED
$41.7B
| $3.79M | ﹤0.01% |
34,300
+5,100
| +17% | +$500K |
|
1489
PUT
Kodak
KODK
$799M
| $3.79M | ﹤0.01% |
600,300
+90,400
| +18% | +$628K |
|
1490
CALL
Toll Brothers
TOL
$14B
| $3.79M | ﹤0.01% |
35,900
-37,400
| -51% | -$4.49M |
|
1491
PUT
Enbridge
ENB
$124B
| $3.79M | ﹤0.01% |
85,500
-117,100
| -58% | -$5.1M |
|
1492
CALL
Vornado Realty Trust
VNO
$7.5B
| $3.79M | ﹤0.01% |
102,400
-34,700
| -25% | -$1.4M |
|
1493
PUT
BorgWarner
BWA
$13.2B
| $3.77M | ﹤0.01% |
131,500
+114,200
| +660% | +$3.46M |
|
1494
PUT
W.W. Grainger
GWW
$65.2B
| $3.77M | ﹤0.01% |
29,000
-5,700
| -16% | -$5.89M |
|
|
HUYA
1495
PUT
Huya Inc
HUYA
$549M
| $3.76M | ﹤0.01% |
1,172,400
+963,500
| +461% | +$3.47M |
|
1496
PUT
Eos Energy Enterprises
EOSE
$1.24B
| $3.76M | ﹤0.01% |
995,200
+421,900
| +74% | +$2.06M |
|
1497
PUT
TPG
TPG
$6.87B
| $3.76M | ﹤0.01% |
79,300
+72,800
| +1,120% | +$4.24M |
|
1498
CALL
West Pharmaceutical
WST
$23.3B
| $3.76M | ﹤0.01% |
16,800
+13,500
| +409% | +$3.72M |
|
1499
CALL
Brookfield
BN
$102B
| $3.76M | ﹤0.01% |
107,550
+71,850
| +201% | +$2.72M |
|
1500
CALL
Host Hotels & Resorts
HST
$16.8B
| $3.76M | ﹤0.01% |
264,400
+176,700
| +201% | +$2.87M |
|
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.