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 | |
|---|---|---|---|---|---|---|
6576
CALL
DiaMedica Therapeutics
DMAC
$379M
| $25K | ﹤0.01% |
3,700
-300
| -8% | -$2.38K |
|
6577
PUT
Primerica
PRI
$9.73B
| $25K | ﹤0.01% |
+100
| New | +$25.8K |
|
6578
PUT
AZZ Inc
AZZ
$4.52B
| $25K | ﹤0.01% |
+200
| New | +$25.2K |
|
6579
CALL
Enovis
ENOV
$1.53B
| $25K | ﹤0.01% |
1,100
-17,600
| -94% | -$416K |
|
6580
CALL
Farmers National Banc Corp
FMNB
$885M
| $25K | ﹤0.01% |
+1,900
| New | +$24.9K |
|
|
RAL
6581
CALL
Ralliant Corp
RAL
$7.81B
| $25K | ﹤0.01% |
+600
| New | +$28.2K |
|
6582
PUT
Interface
TILE
$1.91B
| $24.9K | ﹤0.01% |
+1,000
| New | +$29.9K |
|
6583
Cerence
CRNC
$431M
| $24.8K | ﹤0.01% |
+3,937
| New | +$35.5K |
|
6584
First Commonwealth Financial
FCF
$2.12B
| $24.8K | ﹤0.01% |
+1,413
| New | +$24.9K |
|
6585
CALL
PagerDuty
PD
$688M
| $24.8K | ﹤0.01% |
4,000
-17,100
| -81% | -$148K |
|
6586
CALL
Vontier
VNT
$4.22B
| $24.8K | ﹤0.01% |
+700
| New | +$27K |
|
|
NESR
6587
National Energy Services Reunited Corp
NESR
$2.92B
| $24.8K | ﹤0.01% |
+1,156
| New | +$24.1K |
|
|
ASA
6588
CALL
ASA Gold and Precious Metals
ASA
$978M
| $24.8K | ﹤0.01% |
+400
| New | +$27K |
|
|
ASA
6589
PUT
ASA Gold and Precious Metals
ASA
$978M
| $24.8K | ﹤0.01% |
+400
| New | +$27K |
|
6590
Aramark
ARMK
$14.8B
| $24.8K | ﹤0.01% |
612
-89
| -13% | -$3.53K |
|
|
AGNT
6591
AGNT Inc
AGNT
$705M
| $24.8K | ﹤0.01% |
+4,140
| New | +$32K |
|
6592
PUT
Arcos Dorados Holdings
ARCO
$1.76B
| $24.8K | ﹤0.01% |
+3,000
| New | +$24.3K |
|
6593
CALL
Atea Pharmaceuticals
AVIR
$383M
| $24.7K | ﹤0.01% |
4,600
+1,900
| +70% | +$8.73K |
|
6594
CALL
Core & Main
CNM
$8.24B
| $24.7K | ﹤0.01% |
500
-28,100
| -98% | -$1.51M |
|
6595
Taylor Morrison
TMHC
$6.67B
| $24.7K | ﹤0.01% |
+424
| New | +$26.5K |
|
6596
CuriosityStream
CURI
$152M
| $24.6K | ﹤0.01% |
8,302
+172
| +2% | +$581 |
|
6597
CALL
Ginkgo Bioworks
DNA
$513M
| $24.5K | ﹤0.01% |
+4,000
| New | +$33.3K |
|
6598
CALL
Bitwise Crypto Industry Innovators ETF
BITQ
$411M
| $24.5K | ﹤0.01% |
1,300
+600
| +86% | +$12.5K |
|
|
DOG
6599
ProShares Short Dow30
DOG
$96M
| $24.5K | ﹤0.01% |
1,003
+997
| +16,617% | +$23.3K |
|
6600
Granite Ridge Resources
GRNT
$636M
| $24.5K | ﹤0.01% |
+4,171
| New | +$20.9K |
|
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.