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 | |
|---|---|---|---|---|---|---|
4451
CALL
DT Midstream
DTM
$13.9B
| $175K | ﹤0.01% |
1,300
+700
| +117% | +$91.3K |
|
4452
PUT
Simply Good Foods
SMPL
$907M
| $175K | ﹤0.01% |
12,200
+10,100
| +481% | +$174K |
|
|
YQ
4453
PUT
17 Education & Technology Group
YQ
$19.8M
| $175K | ﹤0.01% |
+96,700
| New | +$303K |
|
4454
CALL
NET Power
NPWR
$120M
| $175K | ﹤0.01% |
112,100
+33,400
| +42% | +$71.3K |
|
4455
CALL
Ollie's Bargain Outlet
OLLI
$4.31B
| $175K | ﹤0.01% |
1,900
-1,100
| -37% | -$119K |
|
|
TDAY
4456
PUT
USA Today Co
TDAY
$1.29B
| $175K | ﹤0.01% |
24,800
+22,900
| +1,205% | +$140K |
|
4457
Bunge Global
BG
$20.9B
| $175K | ﹤0.01% |
1,374
-1,666
| -55% | -$193K |
|
4458
CALL
BlackRock US Equity Factor Rotation ETF
DYNF
$37.4B
| $175K | ﹤0.01% |
+5,300
| New | +$321K |
|
4459
Sally Beauty Holdings
SBH
$1.47B
| $174K | ﹤0.01% |
12,594
+7,710
| +158% | +$118K |
|
4460
CALL
Crinetics Pharmaceuticals
CRNX
$8.88B
| $174K | ﹤0.01% |
+4,800
| New | +$214K |
|
|
NVMI
4461
PUT
Nova
NVMI
$11.7B
| $174K | ﹤0.01% |
400
-900
| -69% | -$396K |
|
4462
Glaukos
GKOS
$9.49B
| $174K | ﹤0.01% |
1,613
+627
| +64% | +$70.6K |
|
4463
PUT
Motorola Solutions
MSI
$72.1B
| $174K | ﹤0.01% |
400
-15,900
| -98% | -$6.88M |
|
4464
CALL
Galectin Therapeutics
GALT
$230M
| $174K | ﹤0.01% |
62,200
-52,200
| -46% | -$159K |
|
4465
CALL
Digital Turbine
APPS
$982M
| $173K | ﹤0.01% |
60,200
-43,900
| -42% | -$189K |
|
4466
PUT
MINISO
MNSO
$3.88B
| $173K | ﹤0.01% |
10,700
+3,800
| +55% | +$69.7K |
|
4467
Vanguard S&P 500 Growth ETF
VOOG
$24.7B
| $173K | ﹤0.01% |
2,550
-2,382
| -48% | -$172K |
|
4468
PUT
PACCAR
PCAR
$70.5B
| $173K | ﹤0.01% |
1,500
-29,200
| -95% | -$3.53M |
|
4469
CALL
Kimco Realty
KIM
$17.5B
| $173K | ﹤0.01% |
7,700
-13,100
| -63% | -$289K |
|
4470
Aflac
AFL
$65.5B
| $173K | ﹤0.01% |
+1,577
| New | +$175K |
|
4471
Tarsus Pharmaceuticals
TARS
$2.55B
| $173K | ﹤0.01% |
2,465
-548
| -18% | -$38.3K |
|
4472
CALL
Alpha Pro Tech
APT
$49.9M
| $173K | ﹤0.01% |
38,900
+31,300
| +412% | +$154K |
|
4473
Nexstar Media Group
NXST
$6.01B
| $173K | ﹤0.01% |
+955
| New | +$214K |
|
4474
PUT
Millicom
TIGO
$15.8B
| $172K | ﹤0.01% |
2,300
-15,200
| -87% | -$997K |
|
4475
PubMatic
PUBM
$608M
| $172K | ﹤0.01% |
20,989
+9,662
| +85% | +$74.3K |
|
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.