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 | |
|---|---|---|---|---|---|---|
5851
PUT
Teekay Tankers
TNK
$2.59B
| $51.3K | ﹤0.01% |
700
+100
| +17% | +$6.69K |
|
5852
PUT
CubeSmart
CUBE
$9.31B
| $51.3K | ﹤0.01% |
1,400
+100
| +8% | +$3.84K |
|
5853
PUT
Maximus
MMS
$3.02B
| $51.3K | ﹤0.01% |
+800
| New | +$64.9K |
|
5854
VistaGen Therapeutics
VTGN
$9.6M
| $51.3K | ﹤0.01% |
+89,649
| New | +$54.5K |
|
5855
Invesco Galaxy Bitcoin ETF
BTCO
$442M
| $51.3K | ﹤0.01% |
760
-304
| -29% | -$23.1K |
|
5856
PUT
Yeti Holdings
YETI
$3.92B
| $51.2K | ﹤0.01% |
1,400
-18,700
| -93% | -$823K |
|
5857
VanEck Merk Gold Trust
OUNZ
$2.56B
| $51.2K | ﹤0.01% |
+1,137
| New | +$53.3K |
|
|
WYFI
5858
PUT
WhiteFiber Inc
WYFI
$1.08B
| $51.2K | ﹤0.01% |
4,300
-9,300
| -68% | -$161K |
|
5859
CALL
Power Integrations
POWI
$4.04B
| $51.2K | ﹤0.01% |
1,000
-13,400
| -93% | -$615K |
|
5860
CALL
Nurix Therapeutics
NRIX
$2.45B
| $51.1K | ﹤0.01% |
3,300
+2,300
| +230% | +$38.1K |
|
5861
State Street SPDR Portfolio High Yield Bond ETF
SPHY
$11.4B
| $51.1K | ﹤0.01% |
+2,193
| New | +$51.8K |
|
5862
Evertec
EVTC
$1.8B
| $51.1K | ﹤0.01% |
1,810
+1,780
| +5,933% | +$50.6K |
|
5863
CALL
CarGurus
CARG
$3.04B
| $51.1K | ﹤0.01% |
1,500
+1,000
| +200% | +$32.7K |
|
|
IVES
5864
PUT
Dan IVES Wedbush AI Revolution ETF
IVES
$1.03B
| $51.1K | ﹤0.01% |
1,800
+1,000
| +125% | +$30.9K |
|
5865
CALL
Arcturus Therapeutics
ARCT
$169M
| $51K | ﹤0.01% |
6,600
+3,200
| +94% | +$23.3K |
|
5866
Customers Bancorp
CUBI
$2.59B
| $50.9K | ﹤0.01% |
+734
| New | +$53.4K |
|
5867
CALL
Nkarta
NKTX
$172M
| $50.9K | ﹤0.01% |
24,100
+20,100
| +503% | +$45K |
|
|
BCPC
5868
CALL
Balchem Corp
BCPC
$5.21B
| $50.8K | ﹤0.01% |
300
+200
| +200% | +$34K |
|
5869
CALL
Evolution Petroleum
EPM
$143M
| $50.8K | ﹤0.01% |
11,100
+3,100
| +39% | +$12.9K |
|
|
TBCH
5870
CALL
Turtle Beach Corp
TBCH
$245M
| $50.7K | ﹤0.01% |
5,000
-24,300
| -83% | -$302K |
|
|
CYPH
5871
CALL
Cypherpunk Technologies Inc
CYPH
$71.6M
| $50.6K | ﹤0.01% |
63,700
-103,000
| -62% | -$79.4K |
|
5872
Gogo Inc
GOGO
$502M
| $50.6K | ﹤0.01% |
12,597
+9,337
| +286% | +$42.5K |
|
5873
City Holding Co
CHCO
$1.96B
| $50.4K | ﹤0.01% |
422
+124
| +42% | +$15.1K |
|
|
MSB
5874
PUT
Mesabi Trust
MSB
$288M
| $50.4K | ﹤0.01% |
+1,600
| New | +$54.5K |
|
5875
PUT
Arena Group
AREN
$48.1M
| $50.3K | ﹤0.01% |
+23,200
| New | +$77.2K |
|
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.