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 | |
|---|---|---|---|---|---|---|
7601
CALL
Zevia
ZVIA
$113M
| $7.49K | ﹤0.01% |
6,400
-2,500
| -28% | -$3.97K |
|
7602
Global X Aging Population ETF
AGNG
$85.6M
| $7.48K | ﹤0.01% |
210
+192
| +1,067% | +$7.06K |
|
7603
PUT
Cumberland Pharmaceuticals
CPIX
$107M
| $7.47K | ﹤0.01% |
+2,300
| New | +$8.86K |
|
|
ARX
7604
Accelerant Holdings
ARX
$2.9B
| $7.45K | ﹤0.01% |
558
-1,006
| -64% | -$12.7K |
|
7605
PUT
Genpact
G
$5.09B
| $7.45K | ﹤0.01% |
200
-20,600
| -99% | -$849K |
|
|
KZIA
7606
CALL
Kazia Therapeutics
KZIA
$160M
| $7.44K | ﹤0.01% |
+1,000
| New | +$6.96K |
|
7607
iShares MSCI EAFE Value ETF
EFV
$27.8B
| $7.43K | ﹤0.01% |
+100
| New | +$7.52K |
|
7608
PUT
Entravision Communication
EVC
$965M
| $7.42K | ﹤0.01% |
+2,500
| New | +$7.67K |
|
7609
Rani Therapeutics
RANI
$99.8M
| $7.42K | ﹤0.01% |
+10,101
| New | +$12.9K |
|
7610
Mueller Industries
MLI
$13.6B
| $7.42K | ﹤0.01% |
134
-3,608
| -96% | -$216K |
|
7611
Red Violet
RDVT
$888M
| $7.4K | ﹤0.01% |
214
-162
| -43% | -$7.12K |
|
|
FIRY
7612
Firy Inc
FIRY
$131M
| $7.39K | ﹤0.01% |
+2,852
| New | +$10.2K |
|
7613
Franklin Electric
FELE
$4.62B
| $7.37K | ﹤0.01% |
80
+55
| +220% | +$5.39K |
|
7614
PUT
Spectrum Brands
SPB
$2.05B
| $7.37K | ﹤0.01% |
+100
| New | +$7.12K |
|
|
RGTU
7615
Tradr 2X Long RGTI Daily ETF
RGTU
$9.1M
| $7.37K | ﹤0.01% |
+512
| New | +$15.7K |
|
7616
PUT
American Well
AMWL
$201M
| $7.36K | ﹤0.01% |
1,400
-15,900
| -92% | -$81.7K |
|
7617
MoneyHero
MNY
$42.8M
| $7.36K | ﹤0.01% |
+5,573
| New | +$7.39K |
|
7618
PUT
Transcat
TRNS
$820M
| $7.34K | ﹤0.01% |
+100
| New | +$7.04K |
|
7619
COPT Defense Properties
CDP
$4.24B
| $7.34K | ﹤0.01% |
240
-909
| -79% | -$28.3K |
|
|
RWT
7620
Redwood Trust
RWT
$635M
| $7.34K | ﹤0.01% |
1,308
-870
| -40% | -$5.04K |
|
7621
PUT
Perimeter Solutions
PRM
$5.65B
| $7.33K | ﹤0.01% |
300
-5,000
| -94% | -$128K |
|
7622
CALL
AdvanSix
ASIX
$590M
| $7.32K | ﹤0.01% |
300
-9,700
| -97% | -$183K |
|
|
TEAD
7623
CALL
Teads Holding Co
TEAD
$80.3M
| $7.31K | ﹤0.01% |
+11,100
| New | +$7.88K |
|
7624
iShares North American Natural Resources ETF
IGE
$744M
| $7.3K | ﹤0.01% |
+116
| New | +$6.8K |
|
7625
PUT
iHeartMedia
IHRT
$547M
| $7.3K | ﹤0.01% |
+2,500
| New | +$8.28K |
|
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.