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 | |
|---|---|---|---|---|---|---|
6476
Planet Fitness
PLNT
$4.22B
| $27.4K | ﹤0.01% |
+369
| New | +$32.4K |
|
6477
CALL
Cullen/Frost Bankers
CFR
$10.2B
| $27.4K | ﹤0.01% |
+200
| New | +$27.6K |
|
|
ZBIO
6478
PUT
Zenas BioPharma
ZBIO
$2.01B
| $27.4K | ﹤0.01% |
1,400
-600
| -30% | -$13.5K |
|
|
WCC
6479
PUT
WESCO International
WCC
$16.1B
| $27.4K | ﹤0.01% |
100
-400
| -80% | -$112K |
|
6480
PUT
Voya Financial
VOYA
$8.89B
| $27.3K | ﹤0.01% |
400
| – | – |
|
6481
PUT
Element Solutions
ESI
$9.36B
| $27.3K | ﹤0.01% |
800
+500
| +167% | +$15.7K |
|
6482
PUT
Enlight Renewable Energy
ENLT
$12.9B
| $27.3K | ﹤0.01% |
+400
| New | +$25.6K |
|
6483
Outlook Therapeutics
OTLK
$247M
| $27.3K | ﹤0.01% |
132,666
+26,869
| +25% | +$11.6K |
|
|
CVNY
6484
YieldMax CVNA Option Income Strategy ETF
CVNY
$18.4M
| $27.3K | ﹤0.01% |
+1,100
| New | +$33.9K |
|
6485
Apyx Medical
APYX
$168M
| $27.3K | ﹤0.01% |
7,392
-2,542
| -26% | -$9.5K |
|
6486
Vontier
VNT
$4.24B
| $27.3K | ﹤0.01% |
+769
| New | +$29.6K |
|
6487
PUT
Interparfums
IPAR
$3.91B
| $27.3K | ﹤0.01% |
300
-14,800
| -98% | -$1.4M |
|
6488
CALL
Orion Group Holdings
ORN
$536M
| $27.3K | ﹤0.01% |
+2,500
| New | +$29.9K |
|
6489
Seres Therapeutics
MCRB
$50.9M
| $27.2K | ﹤0.01% |
3,070
+1,838
| +149% | +$21.5K |
|
6490
CALL
LiveWire
LVWR
$183M
| $27.2K | ﹤0.01% |
16,400
-68,800
| -81% | -$153K |
|
|
ABTC
6491
American Bitcoin Corp
ABTC
$457M
| $27.2K | ﹤0.01% |
1,962
-18,691
| -91% | -$360K |
|
6492
CALL
Eledon Pharmaceuticals
ELDN
$294M
| $27.1K | ﹤0.01% |
8,800
-10,000
| -53% | -$23.6K |
|
6493
PUT
RxSight
RXST
$222M
| $27.1K | ﹤0.01% |
4,400
+2,000
| +83% | +$16.6K |
|
6494
Werewolf Therapeutics
HOWL
$18.1M
| $27.1K | ﹤0.01% |
32,526
+8,472
| +35% | +$5.8K |
|
6495
PUT
CG Oncology
CGON
$6.23B
| $27.1K | ﹤0.01% |
400
-2,300
| -85% | -$130K |
|
6496
Insight Enterprises
NSIT
$3.52B
| $27.1K | ﹤0.01% |
+404
| New | +$33K |
|
6497
Bitdeer Technologies
BTDR
$2.99B
| $27K | ﹤0.01% |
+3,120
| New | +$32.8K |
|
6498
Outset Medical
OM
$77.3M
| $26.9K | ﹤0.01% |
7,017
+994
| +17% | +$4.07K |
|
6499
CALL
Tiziana Life Sciences
TLSA
$121M
| $26.9K | ﹤0.01% |
23,000
-11,000
| -32% | -$15.6K |
|
|
CBL
6500
CALL
DELISTED
CBL& Associates Properties, Inc.
CBL
| $26.9K | ﹤0.01% |
700
+200
| +40% | +$7.69K |
|
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.