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 | |
|---|---|---|---|---|---|---|---|
6001
CALL
Lufax Holding
LU
$1.03B
| $44.7K | ﹤0.01% |
23,900
-4,600
| -16% | -$11.6K |
2020 Q4
21 quarters
|
|
6002
Liberty Live Group Series A
LLYVA
$8.61B
| $44.6K | ﹤0.01% |
+487
| New | +$42.8K |
2026 Q1
0 quarters
|
|
|
LTC
6003
PUT
LTC Properties
LTC
$2.3B
| $44.6K | ﹤0.01% |
1,200
-600
| -33% | -$22.6K |
2019 Q4
25 quarters
|
|
|
NKLR
6004
CALL
Terra Innovatum Global N.V.
NKLR
$385M
| $44.5K | ﹤0.01% |
9,600
-7,300
| -43% | -$35.8K |
2025 Q4
1 quarter
|
|
|
QVCGA
6005
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $44.5K | ﹤0.01% |
20,500
+10,300
| +101% | +$62.6K |
2025 Q3
2 quarters
|
|
6006
CALL
Myers Industries
MYE
$1.18B
| $44.5K | ﹤0.01% |
2,100
+1,800
| +600% | +$37.9K |
2025 Q4
1 quarter
|
|
6007
CALL
1-800-Flowers.com
FLWS
$164M
| $44.4K | ﹤0.01% |
14,600
-47,400
| -76% | -$178K |
2019 Q2
27 quarters
|
|
|
NXDT
6008
CALL
NexPoint Diversified Real Estate Trust
NXDT
$277M
| $44.4K | ﹤0.01% |
9,500
-3,100
| -25% | -$13.9K |
2024 Q4
5 quarters
|
|
6009
Amplitude
AMPL
$1.79B
| $44.4K | ﹤0.01% |
+6,505
| New | +$53.7K |
2026 Q1
0 quarters
|
|
6010
CALL
InflaRx
IFRX
$252M
| $44.4K | ﹤0.01% |
49,600
-92,500
| -65% | -$87.4K |
2025 Q3
2 quarters
|
|
|
AGNT
6011
CALL
AGNT Inc
AGNT
$595M
| $44.3K | ﹤0.01% |
7,400
-33,700
| -82% | -$261K |
2020 Q3
22 quarters
|
|
6012
PUT
Polestar Automotive Holding UK
PSNY
$1.04B
| $44.2K | ﹤0.01% |
2,400
-300,500
| -99% | -$5.44M |
2022 Q2
15 quarters
|
|
6013
Porch Group
PRCH
$1.9B
| $44.2K | ﹤0.01% |
+6,161
| New | +$49.2K |
2026 Q1
0 quarters
|
|
|
ARX
6014
CALL
Accelerant Holdings
ARX
$4.29B
| $44.1K | ﹤0.01% |
3,300
+1,300
| +65% | +$16.4K |
2025 Q3
2 quarters
|
|
|
OSG
6015
Octave Specialty Group
OSG
$194M
| $44K | ﹤0.01% |
9,458
-1,153
| -11% | -$6.6K |
2025 Q1
4 quarters
|
|
6016
CALL
Ameren
AEE
$27.6B
| $44K | ﹤0.01% |
400
-1,300
| -76% | -$139K |
2018 Q2
31 quarters
|
|
6017
CALL
Ocean Power Technologies
OPTT
$9.18M
| $44K | ﹤0.01% |
4,187
+2,030
| +94% | +$26.2K |
2024 Q3
6 quarters
|
|
6018
Badger Meter
BMI
$3.72B
| $43.9K | ﹤0.01% |
+288
| New | +$45.2K |
2026 Q1
0 quarters
|
|
6019
Marqeta
MQ
$1.77B
| $43.9K | ﹤0.01% |
2,688
+1,493
| +125% | +$25.1K |
2025 Q4
1 quarter
|
|
6020
Advantage Solutions
ADV
$349M
| $43.8K | ﹤0.01% |
+2,074
| New | +$39.9K |
2026 Q1
0 quarters
|
|
6021
PUT
Impact Shares Womens Empowerment ETF Trading
WOMN
$57M
| $43.8K | ﹤0.01% |
2,300
+300
| +15% | +$12.3K |
2025 Q3
2 quarters
|
|
6022
Helen of Troy
HELE
$625M
| $43.8K | ﹤0.01% |
+3,038
| New | +$53.1K |
2026 Q1
0 quarters
|
|
|
RAPP
6023
CALL
Rapport Therapeutics
RAPP
$1.58B
| $43.8K | ﹤0.01% |
1,400
+900
| +180% | +$25.3K |
2025 Q3
2 quarters
|
|
6024
CALL
AAR Corp
AIR
$4.02B
| $43.8K | ﹤0.01% |
400
+300
| +300% | +$32.3K |
2025 Q3
2 quarters
|
|
6025
Immunocore
IMCR
$1.57B
| $43.7K | ﹤0.01% |
+1,451
| New | +$46.9K |
2026 Q1
0 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.