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 | |
|---|---|---|---|---|---|---|
6026
CALL
Garrett Motion
GTX
$5.97B
| $43.6K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$41K |
|
6027
PUT
Teradata
TDC
$2.64B
| $43.6K | ﹤0.01% |
1,700
+800
| +89% | +$23.4K |
|
6028
PUT
Avient
AVNT
$3.43B
| $43.6K | ﹤0.01% |
+1,200
| New | +$44.5K |
|
6029
Playboy Inc
PLBY
$147M
| $43.6K | ﹤0.01% |
28,657
-100,928
| -78% | -$184K |
|
|
KQQQ
6030
PUT
Kurv Technology Titans Select ETF
KQQQ
$126M
| $43.5K | ﹤0.01% |
+1,900
| New | +$50.3K |
|
6031
State Street SPDR Dow Jones REIT ETF
RWR
$1.89B
| $43.5K | ﹤0.01% |
+431
| New | +$44.4K |
|
6032
PUT
Lakeland Industries
LAKE
$111M
| $43.4K | ﹤0.01% |
5,300
+3,800
| +253% | +$34.2K |
|
|
AMRN
6033
CALL
Amarin Corp
AMRN
$287M
| $43.4K | ﹤0.01% |
3,000
+2,300
| +329% | +$34.4K |
|
6034
CALL
Bruker
BRKR
$9.09B
| $43.3K | ﹤0.01% |
1,200
-19,000
| -94% | -$795K |
|
|
ETHT
6035
ProShares Ultra Ether ETF
ETHT
$213M
| $43.2K | ﹤0.01% |
+2,887
| New | +$67.2K |
|
6036
PUT
Vanguard Total International Bond ETF
BNDX
$82B
| $43.2K | ﹤0.01% |
+900
| New | +$43.6K |
|
6037
PUT
Designer Brands
DBI
$293M
| $43.2K | ﹤0.01% |
7,600
-133,200
| -95% | -$896K |
|
6038
Nkarta
NKTX
$172M
| $43.2K | ﹤0.01% |
20,486
+10,725
| +110% | +$24K |
|
|
HELP
6039
PUT
Cybin Inc
HELP
$485M
| $43.2K | ﹤0.01% |
9,000
-3,100
| -26% | -$20.1K |
|
6040
CALL
Nano X Imaging
NNOX
$68.1M
| $43.1K | ﹤0.01% |
19,000
-133,300
| -88% | -$351K |
|
6041
CALL
Andersons Inc
ANDE
$2.75B
| $43.1K | ﹤0.01% |
600
+500
| +500% | +$32.1K |
|
6042
PUT
AirSculpt Technologies
AIRS
$340M
| $43K | ﹤0.01% |
+15,200
| New | +$35.4K |
|
6043
Pangaea Logistics
PANL
$489M
| $43K | ﹤0.01% |
+6,074
| New | +$47.9K |
|
6044
Commercial Vehicle Group
CVGI
$162M
| $43K | ﹤0.01% |
12,598
+4,436
| +54% | +$9.14K |
|
6045
CALL
Carter's
CRI
$1.41B
| $42.9K | ﹤0.01% |
1,200
-4,100
| -77% | -$149K |
|
|
AIFC
6046
CALL
AI Financial Corp
AIFC
$67.7M
| $42.7K | ﹤0.01% |
38,500
-308,900
| -89% | -$503K |
|
6047
CALL
MidCap Financial Investment
MFIC
$782M
| $42.7K | ﹤0.01% |
+3,800
| New | +$41.9K |
|
6048
PUT
Loews
L
$23.6B
| $42.7K | ﹤0.01% |
400
-100
| -20% | -$10.7K |
|
6049
Insteel Industries
IIIN
$614M
| $42.7K | ﹤0.01% |
+1,269
| New | +$43.5K |
|
|
ALM
6050
Almonty Industries
ALM
$4.05B
| $42.6K | ﹤0.01% |
+2,944
| New | +$42.1K |
|
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.