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 | |
|---|---|---|---|---|---|---|
4476
Molson Coors Class B
TAP
$8.02B
| $172K | ﹤0.01% |
+3,986
| New | +$189K |
|
4477
CALL
Simpson Manufacturing
SSD
$7.79B
| $172K | ﹤0.01% |
1,000
+100
| +11% | +$18.4K |
|
4478
Enterprise Products Partners
EPD
$83.7B
| $171K | ﹤0.01% |
+4,532
| New | +$160K |
|
4479
CALL
Twist Bioscience
TWST
$5.32B
| $171K | ﹤0.01% |
3,600
-1,800
| -33% | -$80.7K |
|
4480
CALL
EVgo
EVGO
$219M
| $171K | ﹤0.01% |
99,400
+1,200
| +1% | +$3.21K |
|
|
AIV
4481
PUT
Aimco
AIV
$377M
| $171K | ﹤0.01% |
42,000
-341,600
| -89% | -$1.79M |
|
4482
CALL
Voya Financial
VOYA
$8.96B
| $171K | ﹤0.01% |
2,500
-2,100
| -46% | -$152K |
|
4483
CALL
Verisk Analytics
VRSK
$27.9B
| $171K | ﹤0.01% |
900
-5,500
| -86% | -$1.12M |
|
4484
Imperial Petroleum
IMPP
$212M
| $171K | ﹤0.01% |
39,892
-133,614
| -77% | -$534K |
|
4485
CALL
Agilysys
AGYS
$3.21B
| $171K | ﹤0.01% |
2,400
+1,800
| +300% | +$156K |
|
4486
CALL
Dropbox
DBX
$7.78B
| $170K | ﹤0.01% |
7,500
-55,200
| -88% | -$1.4M |
|
|
OFRM
4487
PUT
Once Upon a Farm PBC
OFRM
$662M
| $170K | ﹤0.01% |
+10,400
| New | +$214K |
|
4488
ZTO Express
ZTO
$18.2B
| $170K | ﹤0.01% |
6,754
+6,190
| +1,098% | +$145K |
|
|
SMST
4489
CALL
Defiance Daily Target 2x Short MSTR ETF
SMST
$30.4M
| $170K | ﹤0.01% |
18,800
+16,000
| +571% | +$1.14M |
|
|
TGR
4490
CALL
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $170K | ﹤0.01% |
5,700
+4,300
| +307% | +$128K |
|
4491
VanEck Oil Refiners ETF
CRAK
$209M
| $170K | ﹤0.01% |
+3,440
| New | +$152K |
|
4492
PUT
Wheels Up
UP
$203M
| $170K | ﹤0.01% |
16,450
+13,825
| +527% | +$180K |
|
4493
PUT
Columbia Sportswear
COLM
$3.25B
| $170K | ﹤0.01% |
3,100
-3,000
| -49% | -$173K |
|
4494
SunCoke Energy
SXC
$794M
| $169K | ﹤0.01% |
26,033
+24,927
| +2,254% | +$176K |
|
4495
CALL
Chegg
CHGG
$116M
| $169K | ﹤0.01% |
228,600
-472,800
| -67% | -$332K |
|
|
SKE
4496
CALL
Skeena Resources
SKE
$3.19B
| $169K | ﹤0.01% |
5,700
+5,000
| +714% | +$154K |
|
|
CRESY
4497
PUT
Cresud
CRESY
$806M
| $169K | ﹤0.01% |
13,300
+3,900
| +41% | +$47.4K |
|
4498
Pennant Group
PNTG
$1.43B
| $169K | ﹤0.01% |
+5,544
| New | +$171K |
|
4499
CALL
ESCO Technologies
ESE
$7.77B
| $169K | ﹤0.01% |
+600
| New | +$151K |
|
4500
MBIA
MBI
$275M
| $169K | ﹤0.01% |
28,557
-38,895
| -58% | -$248K |
|
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.