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 | |
|---|---|---|---|---|---|---|
8126
PUT
Lineage Cell Therapeutics
LCTX
$277M
| $3.32K | ﹤0.01% |
+2,100
| New | +$3.54K |
|
8127
PUT
Consolidated Water Co
CWCO
$470M
| $3.31K | ﹤0.01% |
100
| – | – |
|
8128
CALL
Radian Group
RDN
$5.08B
| $3.31K | ﹤0.01% |
100
| – | – |
|
|
YRD
8129
Yiren Digital
YRD
$109M
| $3.31K | ﹤0.01% |
1,922
-1,894
| -50% | -$6.73K |
|
8130
CALL
Priority Technology Holdings
PRTH
$530M
| $3.3K | ﹤0.01% |
+700
| New | +$3.83K |
|
8131
ZipRecruiter
ZIP
$320M
| $3.3K | ﹤0.01% |
1,795
-7,954
| -82% | -$19.5K |
|
8132
CALL
Vivani Medical
VANI
$120M
| $3.3K | ﹤0.01% |
3,300
-2,200
| -40% | -$2.75K |
|
|
GOOS
8133
CALL
Canada Goose Holdings
GOOS
$952M
| $3.29K | ﹤0.01% |
300
-26,200
| -99% | -$315K |
|
8134
PUT
Custom Truck One Source
CTOS
$2.39B
| $3.29K | ﹤0.01% |
500
| – | – |
|
|
MAXN
8135
DELISTED
Maxeon Solar Technologies
MAXN
| $3.28K | ﹤0.01% |
+2,172
| New | +$5.62K |
|
8136
PUT
PubMatic
PUBM
$588M
| $3.27K | ﹤0.01% |
400
-17,700
| -98% | -$136K |
|
|
CTEV
8137
PUT
Claritev Corp
CTEV
$426M
| $3.27K | ﹤0.01% |
200
+100
| +100% | +$2.24K |
|
8138
PUT
Stoke Therapeutics
STOK
$1.8B
| $3.26K | ﹤0.01% |
100
-28,400
| -100% | -$931K |
|
|
KW
8139
DELISTED
Kennedy-Wilson Holdings
KW
| $3.25K | ﹤0.01% |
300
-295
| -50% | -$3.06K |
|
8140
Epsilon Energy
EPSN
$171M
| $3.24K | ﹤0.01% |
526
+471
| +856% | +$2.4K |
|
|
ONTF
8141
CALL
DELISTED
ON24
ONTF
| $3.24K | ﹤0.01% |
400
-1,100
| -73% | -$8.79K |
|
8142
CALL
BGSF Inc
BGSF
$60.1M
| $3.23K | ﹤0.01% |
500
-9,700
| -95% | -$56.7K |
|
8143
Grand Canyon Education
LOPE
$3.63B
| $3.23K | ﹤0.01% |
+19
| New | +$3.19K |
|
|
SLN
8144
Silence Therapeutics
SLN
$559M
| $3.23K | ﹤0.01% |
612
-3,379
| -85% | -$18.6K |
|
8145
Hillman Solutions
HLMN
$1.57B
| $3.22K | ﹤0.01% |
+387
| New | +$3.5K |
|
8146
CALL
Vericel Corp
VCEL
$2.28B
| $3.22K | ﹤0.01% |
100
| – | – |
|
8147
FNB Corp
FNB
$6.71B
| $3.21K | ﹤0.01% |
+192
| New | +$3.32K |
|
|
ECHX
8148
Leverage Shares 2X Long ECHO Daily ETF
ECHX
$31.6M
| $3.21K | ﹤0.01% |
+192
| New | +$3.28K |
|
8149
CALL
Monro
MNRO
$526M
| $3.21K | ﹤0.01% |
200
| – | – |
|
8150
CALL
VTEX
VTEX
$690M
| $3.2K | ﹤0.01% |
800
-500
| -38% | -$1.75K |
|
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.