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 | |
|---|---|---|---|---|---|---|
|
UCTT
6351
CALL
Ultra Clean Holdings
UCTT
$4.11B
| $31.1K | ﹤0.01% |
500
-100
| -17% | -$5.13K |
|
6352
PUT
Sidus Space
SIDU
$200M
| $31.1K | ﹤0.01% |
+13,400
| New | +$36.5K |
|
6353
Evolus
EOLS
$365M
| $31.1K | ﹤0.01% |
7,557
-17,127
| -69% | -$83K |
|
6354
CALL
Qorvo
QRVO
$7.56B
| $31K | ﹤0.01% |
400
-13,500
| -97% | -$1.09M |
|
6355
Purple Innovation
PRPL
$26.6M
| $30.9K | ﹤0.01% |
1,872
+1,388
| +287% | +$24.3K |
|
6356
CALL
Crexendo
CXDO
$249M
| $30.9K | ﹤0.01% |
5,000
-8,500
| -63% | -$55.8K |
|
|
ANGX
6357
PUT
Angel Studios
ANGX
$822M
| $30.8K | ﹤0.01% |
10,100
-2,500
| -20% | -$9.57K |
|
6358
PUT
Kanzhun
BZ
$6.97B
| $30.8K | ﹤0.01% |
2,300
-3,300
| -59% | -$55.9K |
|
6359
PUT
Sabra Healthcare REIT
SBRA
$5.04B
| $30.8K | ﹤0.01% |
1,600
-1,000
| -38% | -$19.7K |
|
6360
CALL
ANI Pharmaceuticals
ANIP
$1.77B
| $30.8K | ﹤0.01% |
+400
| New | +$31.2K |
|
|
CRDU
6361
Tradr 2X Long CRDO Daily ETF
CRDU
$28.1M
| $30.7K | ﹤0.01% |
+8,136
| New | +$61.2K |
|
6362
PUT
ReNew
RNW
$2.25B
| $30.7K | ﹤0.01% |
6,700
-500,700
| -99% | -$2.66M |
|
6363
PUT
Tandem Diabetes Care
TNDM
$1.24B
| $30.7K | ﹤0.01% |
1,600
-3,900
| -71% | -$84.7K |
|
6364
CALL
Editas Medicine
EDIT
$442M
| $30.6K | ﹤0.01% |
12,400
-238,500
| -95% | -$505K |
|
6365
PUT
Inovio Pharmaceuticals
INO
$90.5M
| $30.6K | ﹤0.01% |
17,600
+12,500
| +245% | +$20.6K |
|
6366
PUT
Willdan Group
WLDN
$1.1B
| $30.6K | ﹤0.01% |
+400
| New | +$42.3K |
|
6367
CALL
Community Health Systems
CYH
$440M
| $30.6K | ﹤0.01% |
+10,400
| New | +$33.7K |
|
6368
CALL
Riskified
RSKD
$701M
| $30.6K | ﹤0.01% |
7,800
+3,300
| +73% | +$14.6K |
|
6369
Ormat Technologies
ORA
$6.46B
| $30.6K | ﹤0.01% |
273
-1,069
| -80% | -$124K |
|
|
AIOT
6370
PowerFleet Inc
AIOT
$580M
| $30.6K | ﹤0.01% |
9,919
+8,452
| +576% | +$35.4K |
|
6371
CALL
Geospace Technologies
GEOS
$91.8M
| $30.5K | ﹤0.01% |
2,500
+1,100
| +79% | +$15.4K |
|
6372
Domino's
DPZ
$10.9B
| $30.5K | ﹤0.01% |
+85
| New | +$33.6K |
|
6373
PUT
Alphatec Holdings
ATEC
$1.27B
| $30.5K | ﹤0.01% |
2,800
-11,300
| -80% | -$165K |
|
|
FGNX
6374
PUT
FG Nexus Inc
FGNX
$35.6M
| $30.4K | ﹤0.01% |
+6,100
| New | +$62.1K |
|
6375
PUT
AXIS Capital
AXS
$8.44B
| $30.4K | ﹤0.01% |
300
-1,800
| -86% | -$185K |
|
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.