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 | |
|---|---|---|---|---|---|---|
6726
PUT
Arlo Technologies
ARLO
$1.4B
| $21.3K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$18.7K |
|
6727
CALL
Nautilus Biotechnolgy
NAUT
$216M
| $21.3K | ﹤0.01% |
5,500
+2,900
| +112% | +$7.13K |
|
6728
PUT
Packaging Corp of America
PKG
$20.3B
| $21.2K | ﹤0.01% |
100
-200
| -67% | -$44.6K |
|
6729
Freshworks
FRSH
$2.78B
| $21.2K | ﹤0.01% |
2,640
-32,817
| -93% | -$303K |
|
|
BLFY
6730
CALL
DELISTED
Blue Foundry Bancorp
BLFY
| $21.2K | ﹤0.01% |
1,600
-100
| -6% | -$1.32K |
|
6731
PUT
Provident Financial Services
PFS
$3.13B
| $21.2K | ﹤0.01% |
1,000
+900
| +900% | +$19.2K |
|
6732
Federal Agricultural Mortgage
AGM
$2.26B
| $21.1K | ﹤0.01% |
142
-226
| -61% | -$37K |
|
6733
PUT
The Greenbrier Companies
GBX
$1.58B
| $21.1K | ﹤0.01% |
400
-200
| -33% | -$10.6K |
|
6734
Prestige Consumer Healthcare
PBH
$2.32B
| $21K | ﹤0.01% |
+355
| New | +$23K |
|
6735
CALL
BioLife Solutions
BLFS
$1.52B
| $21K | ﹤0.01% |
1,100
+100
| +10% | +$2.21K |
|
6736
CALL
Stereotaxis
STXS
$148M
| $21K | ﹤0.01% |
11,400
-16,400
| -59% | -$35.9K |
|
|
NXDR
6737
Nextdoor Holdings
NXDR
$885M
| $20.9K | ﹤0.01% |
+14,900
| New | +$25.9K |
|
6738
Azenta
AZTA
$1.25B
| $20.9K | ﹤0.01% |
+987
| New | +$29.5K |
|
6739
PUT
Arcturus Therapeutics
ARCT
$169M
| $20.8K | ﹤0.01% |
2,700
+1,400
| +108% | +$10.2K |
|
6740
ABM Industries
ABM
$2.75B
| $20.8K | ﹤0.01% |
541
-3,006
| -85% | -$130K |
|
|
OMAH
6741
VistaShares Target 15 Berkshire Select Income ETF
OMAH
$946M
| $20.8K | ﹤0.01% |
1,154
+81
| +8% | +$1.49K |
|
6742
PUT
Vista Gold
VGZ
$254M
| $20.8K | ﹤0.01% |
10,600
+9,300
| +715% | +$22K |
|
6743
CALL
Quanterix
QTRX
$181M
| $20.8K | ﹤0.01% |
5,900
-2,200
| -27% | -$12.8K |
|
6744
PUT
Greenlight Captial
GLRE
$537M
| $20.7K | ﹤0.01% |
1,200
+700
| +140% | +$10.2K |
|
6745
KraneShares Hang Seng TECH Index ETF
KTEC
$56.5M
| $20.7K | ﹤0.01% |
1,510
-891
| -37% | -$13.5K |
|
6746
CALL
VanEck Energy Income ETF
EINC
$101M
| $20.7K | ﹤0.01% |
+500
| New | +$54.2K |
|
6747
LendingTree
TREE
$578M
| $20.7K | ﹤0.01% |
+482
| New | +$23.1K |
|
6748
PUT
EyePoint Inc
EYPT
$1.06B
| $20.6K | ﹤0.01% |
1,600
-12,100
| -88% | -$181K |
|
6749
PUT
ManpowerGroup
MAN
$2.4B
| $20.6K | ﹤0.01% |
700
-1,400
| -67% | -$41.6K |
|
|
INFQ
6750
PUT
Infleqtion Inc
INFQ
$2.23B
| $20.6K | ﹤0.01% |
+2,100
| New | +$23.9K |
|
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.