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 | |
|---|---|---|---|---|---|---|
|
EFOR
7576
CALL
Everforth Inc
EFOR
$751M
| $7.74K | ﹤0.01% |
+200
| New | +$8.91K |
|
|
BTCL
7577
T-Rex 2X Long Bitcoin Daily Target ETF
BTCL
$24.4M
| $7.74K | ﹤0.01% |
507
-2,342
| -82% | -$49.7K |
|
7578
CALL
Oxford Industries
OXM
$608M
| $7.7K | ﹤0.01% |
+200
| New | +$7.54K |
|
7579
Vera Therapeutics
VERA
$2.67B
| $7.68K | ﹤0.01% |
+191
| New | +$8.23K |
|
7580
US Commodity Index
USCI
$370M
| $7.63K | ﹤0.01% |
+80
| New | +$6.85K |
|
7581
PUT
Ezcorp Inc
EZPW
$2B
| $7.61K | ﹤0.01% |
+300
| New | +$7.19K |
|
7582
Chefs' Warehouse
CHEF
$3.9B
| $7.61K | ﹤0.01% |
+128
| New | +$8.19K |
|
7583
Global Water Resources
GWRS
$202M
| $7.6K | ﹤0.01% |
1,001
-559
| -36% | -$4.71K |
|
7584
PUT
HighPeak Energy
HPK
$975M
| $7.59K | ﹤0.01% |
1,100
-4,400
| -80% | -$23.1K |
|
7585
CALL
Principal Active High Yield ETF
YLD
$571M
| $7.58K | ﹤0.01% |
+400
| New | +$7.62K |
|
7586
Similarweb
SMWB
$586M
| $7.58K | ﹤0.01% |
2,904
-16,093
| -85% | -$67.1K |
|
7587
HUTCHMED
HCM
$1.95B
| $7.57K | ﹤0.01% |
506
+91
| +22% | +$1.33K |
|
7588
CALL
Regency Centers
REG
$15B
| $7.57K | ﹤0.01% |
100
-700
| -88% | -$52.2K |
|
7589
PUT
Black Stone Minerals
BSM
$3.03B
| $7.56K | ﹤0.01% |
500
-5,500
| -92% | -$81.6K |
|
7590
PUT
Patria Investments
PAX
$1.77B
| $7.56K | ﹤0.01% |
600
+400
| +200% | +$5.63K |
|
7591
Bridgewater Bancshares
BWB
$612M
| $7.56K | ﹤0.01% |
+427
| New | +$7.83K |
|
7592
YieldMax Innovation Option Income Strategy ETF
OARK
$53.4M
| $7.56K | ﹤0.01% |
248
-718
| -74% | -$24.2K |
|
7593
PUT
Natural Gas Services Group
NGS
$490M
| $7.55K | ﹤0.01% |
200
+100
| +100% | +$3.66K |
|
7594
CALL
Extreme Networks
EXTR
$3.96B
| $7.54K | ﹤0.01% |
500
-10,900
| -96% | -$163K |
|
7595
CALL
Neuronetics
STIM
$131M
| $7.54K | ﹤0.01% |
5,200
+1,800
| +53% | +$2.85K |
|
7596
OneSpaWorld
OSW
$2.68B
| $7.53K | ﹤0.01% |
+328
| New | +$6.98K |
|
7597
State Street SPDR S&P Global Infrastructure ETF
GII
$926M
| $7.53K | ﹤0.01% |
99
+12
| +14% | +$895 |
|
7598
PUT
Endava
DAVA
$147M
| $7.51K | ﹤0.01% |
1,700
-24,000
| -93% | -$133K |
|
7599
CALL
NMI Holdings
NMIH
$3.24B
| $7.5K | ﹤0.01% |
200
-100
| -33% | -$3.87K |
|
7600
PUT
US Physical Therapy
USPH
$1.13B
| $7.5K | ﹤0.01% |
100
| – | – |
|
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.