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 | |
|---|---|---|---|---|---|---|
5201
CALL
Cheniere Energy
CQP
$31.8B
| $90.5K | ﹤0.01% |
1,400
+500
| +56% | +$29.9K |
|
5202
PUT
Nexstar Media Group
NXST
$5.6B
| $90.4K | ﹤0.01% |
500
+300
| +150% | +$67.3K |
|
5203
PUT
Cabot Corp
CBT
$4.65B
| $90.4K | ﹤0.01% |
1,200
-3,300
| -73% | -$240K |
|
|
GRID
5204
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$11.4B
| $90.3K | ﹤0.01% |
+552
| New | +$91.8K |
|
5205
CALL
Nelnet
NNI
$4.79B
| $90.3K | ﹤0.01% |
+700
| New | +$92K |
|
5206
PUT
Green Brick Partners
GRBK
$3.13B
| $90.2K | ﹤0.01% |
1,400
-4,100
| -75% | -$288K |
|
5207
Eagle Materials
EXP
$6.6B
| $90.2K | ﹤0.01% |
+476
| New | +$101K |
|
5208
CALL
US Physical Therapy
USPH
$1.14B
| $90K | ﹤0.01% |
1,200
-1,000
| -45% | -$81.9K |
|
5209
CALL
TransUnion
TRU
$14.8B
| $89.9K | ﹤0.01% |
1,300
-4,000
| -75% | -$306K |
|
5210
PUT
Build-A-Bear
BBW
$423M
| $89.9K | ﹤0.01% |
2,400
-4,600
| -66% | -$242K |
|
|
TGEN
5211
CALL
Tecogen Inc
TGEN
$96.3M
| $89.9K | ﹤0.01% |
35,100
-18,200
| -34% | -$66.8K |
|
|
AUGO
5212
PUT
Aura Minerals Inc
AUGO
$4.58B
| $89.8K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$70.1K |
|
5213
PUT
KB Financial Group
KB
$41.2B
| $89.8K | ﹤0.01% |
900
+400
| +80% | +$40.2K |
|
|
FOLD
5214
CALL
DELISTED
Amicus Therapeutics
FOLD
| $89.7K | ﹤0.01% |
6,200
-900
| -13% | -$12.9K |
|
5215
CALL
Neonode
NEON
$13M
| $89.6K | ﹤0.01% |
64,000
+17,000
| +36% | +$29.4K |
|
5216
CALL
Matrix Service
MTRX
$347M
| $89.5K | ﹤0.01% |
7,800
-4,100
| -34% | -$48.8K |
|
5217
PUT
USA Compression Partners
USAC
$3.82B
| $89.5K | ﹤0.01% |
3,300
-3,700
| -53% | -$98.2K |
|
5218
Haleon
HLN
$43.1B
| $89.3K | ﹤0.01% |
8,922
+1,122
| +14% | +$11.7K |
|
|
HNGE
5219
Hinge Health
HNGE
$5.75B
| $89.3K | ﹤0.01% |
+2,316
| New | +$96.2K |
|
|
NFGC
5220
New Found Gold
NFGC
$534M
| $89.3K | ﹤0.01% |
46,030
+29,570
| +180% | +$79.3K |
|
5221
PUT
Magna International
MGA
$17.9B
| $89.3K | ﹤0.01% |
1,600
-7,800
| -83% | -$445K |
|
5222
Popular Inc
BPOP
$11B
| $89.2K | ﹤0.01% |
665
+634
| +2,045% | +$85K |
|
|
BIOA
5223
PUT
BioAge Labs
BIOA
$968M
| $89.2K | ﹤0.01% |
5,100
+3,800
| +292% | +$73.2K |
|
5224
CALL
Innoviz Technologies
INVZ
$135M
| $89.2K | ﹤0.01% |
141,000
-107,000
| -43% | -$97.8K |
|
5225
PUT
Tecnoglass
TGLS
$2.01B
| $89.1K | ﹤0.01% |
2,000
+500
| +33% | +$24.1K |
|
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.