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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2076
PUT
Nice
NICE
$5.57B
| $1.51M | ﹤0.01% |
13,700
-18,100
| -57% | -$2.07M |
|
2077
CALL
AtaiBeckley Inc
ATAI
$2.65B
| $1.51M | ﹤0.01% |
426,700
+270,100
| +172% | +$1.02M |
|
|
FLG
2078
Flagstar Bank National Association
FLG
$5.74B
| $1.51M | ﹤0.01% |
+114,582
| New | +$1.5M |
|
2079
CALL
Dynatrace
DT
$12.7B
| $1.51M | ﹤0.01% |
40,800
-58,800
| -59% | -$2.25M |
|
2080
CALL
Karyopharm Therapeutics
KPTI
$161M
| $1.51M | ﹤0.01% |
270,700
+261,900
| +2,976% | +$2M |
|
2081
CALL
Sherwin-Williams
SHW
$80.7B
| $1.51M | ﹤0.01% |
4,700
-8,600
| -65% | -$2.96M |
|
|
ETHE
2082
PUT
Grayscale Ethereum Staking ETF Shares
ETHE
$1.58B
| $1.5M | ﹤0.01% |
+87,800
| New | +$1.72M |
|
|
MDLN
2083
PUT
Medline Inc
MDLN
$33.6B
| $1.5M | ﹤0.01% |
33,600
+27,600
| +460% | +$1.22M |
|
|
JOYY
2084
CALL
JOYY Inc
JOYY
$3.77B
| $1.49M | ﹤0.01% |
25,600
+24,200
| +1,729% | +$1.53M |
|
2085
PUT
Summit Therapeutics
SMMT
$10.5B
| $1.49M | ﹤0.01% |
78,800
-26,000
| -25% | -$420K |
|
2086
Dell
DELL
$276B
| $1.49M | ﹤0.01% |
9,098
-124,851
| -93% | -$16.6M |
|
2087
PUT
Banc of California
BANC
$3.21B
| $1.49M | ﹤0.01% |
84,800
+69,800
| +465% | +$1.33M |
|
2088
PUT
CBRE Group
CBRE
$42.1B
| $1.49M | ﹤0.01% |
11,000
+10,900
| +10,900% | +$1.66M |
|
2089
PUT
Trevi Therapeutics
TRVI
$2.57B
| $1.49M | ﹤0.01% |
124,900
+11,100
| +10% | +$124K |
|
2090
PUT
Iovance Biotherapeutics
IOVA
$2.19B
| $1.49M | ﹤0.01% |
424,300
+84,700
| +25% | +$271K |
|
|
JBS
2091
PUT
JBS N.V.
JBS
$44.6B
| $1.49M | ﹤0.01% |
82,900
-417,600
| -83% | -$6.5M |
|
2092
CALL
GigaCloud Technology
GCT
$1.46B
| $1.49M | ﹤0.01% |
32,800
-18,300
| -36% | -$744K |
|
2093
CALL
M&T Bank
MTB
$36B
| $1.49M | ﹤0.01% |
7,200
-800
| -10% | -$172K |
|
2094
HSBC
HSBC
$357B
| $1.48M | ﹤0.01% |
+17,986
| New | +$1.52M |
|
2095
Papa John's
PZZA
$997M
| $1.48M | ﹤0.01% |
45,762
+28,873
| +171% | +$1M |
|
2096
PUT
Genuine Parts
GPC
$17.6B
| $1.48M | ﹤0.01% |
14,000
+11,500
| +460% | +$1.42M |
|
|
CMPS
2097
Compass Pathways
CMPS
$1.52B
| $1.48M | ﹤0.01% |
267,465
+162,235
| +154% | +$1.09M |
|
2098
Lamb Weston
LW
$7.3B
| $1.48M | ﹤0.01% |
34,972
+517
| +2% | +$23.1K |
|
2099
CALL
Vail Resorts
MTN
$5.28B
| $1.48M | ﹤0.01% |
11,500
+7,300
| +174% | +$996K |
|
2100
CALL
Argan
AGX
$7.61B
| $1.47M | ﹤0.01% |
2,700
-1,000
| -27% | -$408K |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.