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 | |
|---|---|---|---|---|---|---|---|
|
CLYM
5376
CALL
Climb Bio
CLYM
$628M
| $77.4K | ﹤0.01% |
+11,300
| New | +$65.2K |
2026 Q1
0 quarters
|
|
|
BETA
5377
Beta Technologies Inc
BETA
$5.19B
| $77.3K | ﹤0.01% |
5,260
+4,049
| +334% | +$83K |
2025 Q4
1 quarter
|
|
5378
PUT
Olin
OLN
$1.81B
| $77.3K | ﹤0.01% |
2,600
-4,400
| -63% | -$108K |
2021 Q2
19 quarters
|
|
5379
PUT
Invesco CurrencyShares Swiss Franc Trust
FXF
$382M
| $77.3K | ﹤0.01% |
+700
| New | +$79K |
2026 Q1
0 quarters
|
|
5380
GeoPark
GPRK
$704M
| $77.1K | ﹤0.01% |
8,120
-1,320
| -14% | -$11.1K |
2023 Q3
10 quarters
|
|
5381
CALL
Prairie Operating Co
PROP
$42.4M
| $77.1K | ﹤0.01% |
38,000
+4,600
| +14% | +$8.31K |
2025 Q2
3 quarters
|
|
5382
Hawkins
HWKN
$2.74B
| $77.1K | ﹤0.01% |
502
+156
| +45% | +$22.8K |
2025 Q4
1 quarter
|
|
|
XRP
5383
Bitwise XRP ETF
XRP
$333M
| $76.9K | ﹤0.01% |
+5,119
| New | +$92.4K |
2026 Q1
0 quarters
|
|
5384
CALL
Rogers Communications
RCI
$16.7B
| $76.9K | ﹤0.01% |
2,000
-18,400
| -90% | -$701K |
2025 Q1
4 quarters
|
|
5385
Grid Dynamics Holdings
GDYN
$651M
| $76.8K | ﹤0.01% |
13,482
-17,927
| -57% | -$132K |
2025 Q3
2 quarters
|
|
5386
American Healthcare REIT
AHR
$11.1B
| $76.8K | ﹤0.01% |
+1,628
| New | +$80.7K |
2026 Q1
0 quarters
|
|
5387
Arteris
AIP
$1.21B
| $76.7K | ﹤0.01% |
4,666
-35,052
| -88% | -$556K |
2024 Q4
5 quarters
|
|
5388
CALL
Axos Financial
AX
$5.05B
| $76.6K | ﹤0.01% |
900
-2,100
| -70% | -$191K |
2022 Q3
14 quarters
|
|
5389
PUT
Standex International
SXI
$3.54B
| $76.5K | ﹤0.01% |
+300
| New | +$75.3K |
2026 Q1
0 quarters
|
|
5390
PUT
NRC Health Common Stock
NRC
$450M
| $76.4K | ﹤0.01% |
4,500
+4,300
| +2,150% | +$73.1K |
2025 Q2
3 quarters
|
|
|
DRD
5391
PUT
DRDGold
DRD
$2.11B
| $76.4K | ﹤0.01% |
2,600
-100
| -4% | -$3.33K |
2020 Q1
24 quarters
|
|
5392
Norfolk Southern
NSC
$71.3B
| $76.3K | ﹤0.01% |
266
-12,053
| -98% | -$3.58M |
2024 Q3
6 quarters
|
|
5393
ClearPoint Neuro
CLPT
$332M
| $76.3K | ﹤0.01% |
8,382
-13,941
| -62% | -$176K |
2025 Q3
2 quarters
|
|
5394
PUT
ITT
ITT
$18.4B
| $76.2K | ﹤0.01% |
400
+200
| +100% | +$38.1K |
2025 Q3
2 quarters
|
|
|
5395
Standex International
SXI
$3.54B
| $76.2K | ﹤0.01% |
299
+137
| +85% | +$34.4K |
2025 Q4
1 quarter
|
|
5396
PUT
Savers
SVV
$1.42B
| $75.9K | ﹤0.01% |
10,200
-4,200
| -29% | -$40.1K |
2025 Q3
2 quarters
|
|
|
LX
5397
PUT
LexinFintech Holdings
LX
$113M
| $75.9K | ﹤0.01% |
34,800
+15,100
| +77% | +$42.4K |
2018 Q2
31 quarters
|
|
5398
PUT
Westwater Resources
WWR
$65.4M
| $75.9K | ﹤0.01% |
116,000
-103,500
| -47% | -$93.2K |
2025 Q4
1 quarter
|
|
5399
CALL
International Money Express
IMXI
$348M
| $75.8K | ﹤0.01% |
+4,800
| New | +$75K |
2026 Q1
0 quarters
|
|
5400
CALL
Parsons
PSN
$4.36B
| $75.8K | ﹤0.01% |
1,400
-15,300
| -92% | -$977K |
2022 Q1
16 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.