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 | |
|---|---|---|---|---|---|---|
6251
PUT
UL Solutions
ULS
$17.2B
| $34.3K | ﹤0.01% |
+400
| New | +$31.5K |
|
|
NMG
6252
PUT
Nouveau Monde Graphite
NMG
$434M
| $34.3K | ﹤0.01% |
15,300
-13,600
| -47% | -$33.2K |
|
|
ARDT
6253
PUT
Ardent Health
ARDT
$1.5B
| $34.2K | ﹤0.01% |
4,000
+2,900
| +264% | +$26K |
|
6254
PUT
Moelis & Co
MC
$4.99B
| $34.2K | ﹤0.01% |
+600
| New | +$39K |
|
6255
PUT
Tronox
TROX
$1.04B
| $34.2K | ﹤0.01% |
3,500
+2,900
| +483% | +$20.1K |
|
6256
Diana Shipping
DSX
$276M
| $34.1K | ﹤0.01% |
13,863
-2,993
| -18% | -$6.86K |
|
6257
CALL
AngioDynamics
ANGO
$567M
| $34.1K | ﹤0.01% |
3,000
+2,300
| +329% | +$24.9K |
|
6258
DMC Global
BOOM
$128M
| $34.1K | ﹤0.01% |
6,544
+1,631
| +33% | +$11.4K |
|
6259
PUT
CarGurus
CARG
$3.16B
| $34K | ﹤0.01% |
+1,000
| New | +$32.7K |
|
6260
CALL
Milestone Pharmaceuticals
MIST
$147M
| $34K | ﹤0.01% |
+28,600
| New | +$50.1K |
|
6261
CALL
The RMR Group
RMR
$340M
| $34K | ﹤0.01% |
2,200
-11,800
| -84% | -$192K |
|
|
ALMU
6262
PUT
Aeluma Inc
ALMU
$301M
| $34K | ﹤0.01% |
2,600
-1,700
| -40% | -$28.2K |
|
6263
PUT
CareCloud
CCLD
$96.5M
| $33.9K | ﹤0.01% |
9,300
+4,100
| +79% | +$11.7K |
|
6264
CALL
Flotek Industries
FTK
$927M
| $33.9K | ﹤0.01% |
2,000
+1,500
| +300% | +$25.8K |
|
|
MEME
6265
Roundhill Meme Stock ETF
MEME
$19.1M
| $33.9K | ﹤0.01% |
5,489
-4,151
| -43% | -$29.2K |
|
6266
CALL
Dycom Industries
DY
$12.3B
| $33.9K | ﹤0.01% |
100
-9,400
| -99% | -$3.53M |
|
|
SELF
6267
Global Self Storage
SELF
$58.1M
| $33.8K | ﹤0.01% |
+6,618
| New | +$33.5K |
|
6268
PUT
Mitek Systems
MITK
$833M
| $33.8K | ﹤0.01% |
2,500
+2,400
| +2,400% | +$29.7K |
|
6269
CALL
TD Synnex
SNX
$19.1B
| $33.7K | ﹤0.01% |
200
-100
| -33% | -$15.8K |
|
6270
PUT
Grupo Aeroportuario del Sureste
ASR
$8.25B
| $33.6K | ﹤0.01% |
+100
| New | +$34.2K |
|
|
NXDR
6271
CALL
Nextdoor Holdings
NXDR
$927M
| $33.6K | ﹤0.01% |
24,000
-521,500
| -96% | -$906K |
|
6272
Atea Pharmaceuticals
AVIR
$382M
| $33.6K | ﹤0.01% |
6,244
+4,349
| +229% | +$20K |
|
6273
CALL
Prosperity Bancshares
PB
$8.75B
| $33.6K | ﹤0.01% |
500
-2,700
| -84% | -$189K |
|
6274
Gerdau
GGB
$9.19B
| $33.6K | ﹤0.01% |
9,302
+8,048
| +642% | +$31.6K |
|
6275
Agilon Health
AGL
$2.04B
| $33.6K | ﹤0.01% |
4,245
-301
| -7% | -$4.87K |
|
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.