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 | |
|---|---|---|---|---|---|---|
|
GAU
6901
PUT
Galiano Gold
GAU
$483M
| $16.8K | ﹤0.01% |
6,700
-5,200
| -44% | -$14.7K |
|
6902
Power Integrations
POWI
$3.96B
| $16.8K | ﹤0.01% |
328
-6,484
| -95% | -$298K |
|
6903
PUT
Atomera
ATOM
$212M
| $16.8K | ﹤0.01% |
4,400
-6,000
| -58% | -$22.6K |
|
6904
PUT
AGF US Market Neutral Anti-Beta Fund
BTAL
$297M
| $16.8K | ﹤0.01% |
1,200
| – | – |
|
6905
Schwab US TIPS ETF
SCHP
$16.4B
| $16.7K | ﹤0.01% |
+629
| New | +$16.8K |
|
6906
PUT
Tango Therapeutics
TNGX
$4.48B
| $16.7K | ﹤0.01% |
800
+400
| +100% | +$5.57K |
|
6907
CALL
First Financial Bancorp
FFBC
$3.74B
| $16.7K | ﹤0.01% |
600
+200
| +50% | +$5.57K |
|
6908
PUT
US Gold Corp
USAU
$233M
| $16.7K | ﹤0.01% |
1,100
-25,700
| -96% | -$461K |
|
6909
CALL
SPS Commerce
SPSC
$2.28B
| $16.7K | ﹤0.01% |
300
+200
| +200% | +$14.4K |
|
6910
PUT
Ashland
ASH
$3.14B
| $16.7K | ﹤0.01% |
300
-8,000
| -96% | -$473K |
|
|
ELME
6911
PUT
Elme Communities
ELME
$133M
| $16.7K | ﹤0.01% |
8,300
| – | – |
|
6912
PUT
DNOW Inc
DNOW
$2.6B
| $16.7K | ﹤0.01% |
+1,400
| New | +$18.9K |
|
6913
PUT
Kymera Therapeutics
KYMR
$9.33B
| $16.7K | ﹤0.01% |
200
| – | – |
|
6914
CALL
OPAL Fuels
OPAL
$76.8M
| $16.6K | ﹤0.01% |
+6,600
| New | +$15.2K |
|
6915
PUT
BGC Group
BGC
$5.36B
| $16.6K | ﹤0.01% |
1,700
+100
| +6% | +$926 |
|
6916
CALL
Oportun Financial
OPRT
$273M
| $16.6K | ﹤0.01% |
3,600
+3,000
| +500% | +$15.3K |
|
6917
JELD-WEN Holding
JELD
$101M
| $16.6K | ﹤0.01% |
13,383
-16,031
| -55% | -$35.1K |
|
6918
State Street SPDR S&P Health Care Equipment ETF
XHE
$149M
| $16.6K | ﹤0.01% |
+212
| New | +$18.1K |
|
|
WMCR
6919
CALL
DELISTED
Invesco Wilshire Micro-Cap ETF
WMCR
| $16.6K | ﹤0.01% |
+400
| New | +$16.6K |
|
|
FJET
6920
PUT
Starfighters Space Inc
FJET
$183M
| $16.6K | ﹤0.01% |
2,800
-7,300
| -72% | -$58.5K |
|
6921
CALL
Methode Electronics
MEI
$536M
| $16.6K | ﹤0.01% |
3,000
-5,300
| -64% | -$38.8K |
|
6922
CALL
Aaon
AAON
$8.65B
| $16.6K | ﹤0.01% |
200
-5,900
| -97% | -$536K |
|
6923
PUT
Texas Roadhouse
TXRH
$12.9B
| $16.5K | ﹤0.01% |
100
-10,200
| -99% | -$1.83M |
|
6924
PUT
MarketAxess Holdings
MKTX
$4.08B
| $16.5K | ﹤0.01% |
100
-6,600
| -99% | -$1.16M |
|
6925
CALL
Gogo Inc
GOGO
$475M
| $16.5K | ﹤0.01% |
4,100
-27,300
| -87% | -$124K |
|
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.