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 | |
|---|---|---|---|---|---|---|---|
5726
PUT
Crescent Capital BDC
CCAP
$333M
| $57.1K | ﹤0.01% |
4,700
+3,500
| +292% | +$47.9K |
2024 Q3
6 quarters
|
|
5727
Labcorp
LH
$25B
| $57.1K | ﹤0.01% |
214
-3,428
| -94% | -$928K |
2025 Q2
3 quarters
|
|
5728
CALL
GrowGeneration
GRWG
$92.5M
| $57.1K | ﹤0.01% |
51,900
+40,800
| +368% | +$50.9K |
2025 Q2
3 quarters
|
|
5729
Bristow Group
VTOL
$1.19B
| $56.9K | ﹤0.01% |
+1,213
| New | +$53.3K |
2026 Q1
0 quarters
|
|
5730
Nano X Imaging
NNOX
$49.7M
| $56.8K | ﹤0.01% |
25,039
-21,506
| -46% | -$56.6K |
2025 Q1
4 quarters
|
|
5731
Matthews International
MATW
$602M
| $56.8K | ﹤0.01% |
2,201
-2,729
| -55% | -$71.5K |
2025 Q1
4 quarters
|
|
5732
CALL
Copa Holdings
CPA
$5.41B
| $56.8K | ﹤0.01% |
500
-2,100
| -81% | -$276K |
2022 Q3
14 quarters
|
|
5733
PUT
Allegiant Air
ALGT
$2.12B
| $56.7K | ﹤0.01% |
700
+500
| +250% | +$46K |
2019 Q4
25 quarters
|
|
5734
CALL
3D Systems Corp
DDD
$626M
| $56.6K | ﹤0.01% |
30,100
-87,800
| -74% | -$195K |
2014 Q4
45 quarters
|
|
5735
CALL
Option Care Health
OPCH
$3.39B
| $56.5K | ﹤0.01% |
2,100
-20,700
| -91% | -$672K |
2022 Q3
14 quarters
|
|
5736
Sky Harbour Group
SKYH
$368M
| $56.5K | ﹤0.01% |
+5,868
| New | +$54.1K |
2026 Q1
0 quarters
|
|
5737
CALL
MYR Group
MYRG
$4.75B
| $56.5K | ﹤0.01% |
200
| – | – |
2025 Q2
3 quarters
|
|
5738
PUT
Neurogene
NGNE
$513M
| $56.4K | ﹤0.01% |
2,800
+2,700
| +2,700% | +$52.3K |
2025 Q1
4 quarters
|
|
5739
PUT
Protalix BioTherapeutics
PLX
$218M
| $56.4K | ﹤0.01% |
+26,000
| New | +$64.5K |
2026 Q1
0 quarters
|
|
5740
Aura Biosciences
AURA
$632M
| $56.4K | ﹤0.01% |
8,430
+5,796
| +220% | +$33.3K |
2025 Q4
1 quarter
|
|
5741
PUT
Astrana Health
ASTH
$1.78B
| $56.4K | ﹤0.01% |
2,300
+1,700
| +283% | +$40.3K |
2023 Q4
9 quarters
|
|
5742
Arq
ARQ
$85.2M
| $56.3K | ﹤0.01% |
21,981
+19,670
| +851% | +$63K |
2025 Q4
1 quarter
|
|
5743
CALL
TFS Financial
TFSL
$4.72B
| $56.2K | ﹤0.01% |
4,000
+3,100
| +344% | +$43.8K |
2025 Q4
1 quarter
|
|
|
ACRE
5744
CALL
Ares Commercial Real Estate
ACRE
$213M
| $56.2K | ﹤0.01% |
11,700
-1,100
| -9% | -$5.51K |
2025 Q1
4 quarters
|
|
5745
Agree Realty
ADC
$8.2B
| $56.2K | ﹤0.01% |
745
+400
| +116% | +$30.3K |
2025 Q4
1 quarter
|
|
5746
Kura Oncology
KURA
$947M
| $56.1K | ﹤0.01% |
6,905
-21,158
| -75% | -$182K |
2025 Q1
4 quarters
|
|
5747
CALL
Cadiz
CDZI
$326M
| $56K | ﹤0.01% |
11,400
-77,900
| -87% | -$426K |
2024 Q4
5 quarters
|
|
5748
NeoGenomics
NEO
$2.37B
| $55.9K | ﹤0.01% |
7,536
-7,155
| -49% | -$75.3K |
2025 Q1
4 quarters
|
|
5749
Direxion Daily 7-10 Year Treasury Bear 3X ETF
TYO
$11M
| $55.8K | ﹤0.01% |
+4,090
| New | +$54.5K |
2026 Q1
0 quarters
|
|
5750
Columbus McKinnon
CMCO
$483M
| $55.8K | ﹤0.01% |
3,838
+182
| +5% | +$3.39K |
2025 Q1
4 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.