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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
6451
PUT
National Fuel Gas
NFG
$7.25B
| $28.2K | ﹤0.01% |
300
-600
| -67% | -$52.4K |
2019 Q1
28 quarters
|
|
6452
Stepan Co
SCL
$1.4B
| $28.2K | ﹤0.01% |
+564
| New | +$30.2K |
2026 Q1
0 quarters
|
|
6453
DXC Technology
DXC
$1.86B
| $28.1K | ﹤0.01% |
2,238
-14,204
| -86% | -$191K |
2025 Q1
4 quarters
|
|
6454
CALL
First Trust Exchange-Traded Fund VI Multi-Asset Diversified Income Index Fund
MDIV
$405M
| $28K | ﹤0.01% |
400
-5,200
| -93% | -$84.8K |
2022 Q1
16 quarters
|
|
6455
CALL
Personalis
PSNL
$1.73B
| $28K | ﹤0.01% |
4,400
+3,400
| +340% | +$28.7K |
2024 Q3
6 quarters
|
|
6456
CALL
Luxfer Holdings
LXFR
$465M
| $28K | ﹤0.01% |
2,300
-1,900
| -45% | -$26.4K |
2024 Q4
5 quarters
|
|
6457
PUT
One Stop Systems
OSS
$224M
| $28K | ﹤0.01% |
3,700
+1,500
| +68% | +$14K |
2024 Q2
7 quarters
|
|
6458
Mirum Pharmaceuticals
MIRM
$5.45B
| $28K | ﹤0.01% |
+303
| New | +$28.5K |
2026 Q1
0 quarters
|
|
6459
PUT
Veritone
VERI
$75.3M
| $28K | ﹤0.01% |
14,200
+2,500
| +21% | +$8.45K |
2020 Q2
23 quarters
|
|
6460
Las Vegas Sands
LVS
$23.8B
| $28K | ﹤0.01% |
519
-33,378
| -98% | -$1.9M |
2023 Q3
10 quarters
|
|
6461
CALL
DXP Enterprises
DXPE
$2.83B
| $27.9K | ﹤0.01% |
200
-200
| -50% | -$26.8K |
2025 Q1
4 quarters
|
|
6462
CALL
PJT Partners
PJT
$3.59B
| $27.9K | ﹤0.01% |
200
+100
| +100% | +$15.7K |
2025 Q3
2 quarters
|
|
6463
RenaissanceRe
RNR
$13.4B
| $27.9K | ﹤0.01% |
+94
| New | +$27.3K |
2026 Q1
0 quarters
|
|
6464
NCR Atleos
NATL
$3.33B
| $27.9K | ﹤0.01% |
+641
| New | +$26.5K |
2026 Q1
0 quarters
|
|
6465
CALL
OP Bancorp
OPBK
$227M
| $27.9K | ﹤0.01% |
2,100
+500
| +31% | +$6.87K |
2024 Q4
5 quarters
|
|
6466
CALL
Gibraltar Industries
ROCK
$1.18B
| $27.9K | ﹤0.01% |
700
+400
| +133% | +$19.3K |
2025 Q4
1 quarter
|
|
6467
Global X Dow 30 Covered Call ETF
DJIA
$186M
| $27.9K | ﹤0.01% |
1,326
-114
| -8% | -$2.51K |
2024 Q2
7 quarters
|
|
|
ARDT
6468
Ardent Health
ARDT
$1.45B
| $27.9K | ﹤0.01% |
3,259
-2,143
| -40% | -$19.2K |
2025 Q4
1 quarter
|
|
|
ANGX
6469
Angel Studios
ANGX
$790M
| $27.8K | ﹤0.01% |
9,124
-12,547
| -58% | -$48K |
2025 Q4
1 quarter
|
|
6470
PUT
Enanta Pharmaceuticals
ENTA
$374M
| $27.8K | ﹤0.01% |
2,200
+900
| +69% | +$12.1K |
2025 Q1
4 quarters
|
|
|
CAN
6471
PUT
Canaan Creative
CAN
$249M
| $27.6K | ﹤0.01% |
64,000
-82,400
| -56% | -$48.2K |
2021 Q2
19 quarters
|
|
6472
Vanguard Intermediate-Term Treasury ETF
VGIT
$38.8B
| $27.6K | ﹤0.01% |
+463
| New | +$27.7K |
2026 Q1
0 quarters
|
|
|
LAND
6473
PUT
Gladstone Land Corp
LAND
$412M
| $27.5K | ﹤0.01% |
2,700
-12,000
| -82% | -$129K |
2018 Q2
31 quarters
|
|
6474
PUT
CuriosityStream
CURI
$174M
| $27.5K | ﹤0.01% |
9,300
+1,100
| +13% | +$3.71K |
2024 Q4
5 quarters
|
|
6475
PUT
Ardmore Shipping
ASC
$786M
| $27.4K | ﹤0.01% |
1,800
+1,300
| +260% | +$17.9K |
2020 Q2
23 quarters
|
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.