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 | |
|---|---|---|---|---|---|---|
6526
Sabre
SABR
$672M
| $26.3K | ﹤0.01% |
18,138
-72,622
| -80% | -$96.7K |
|
6527
PUT
Solana Company
HSDT
$102M
| $26.3K | ﹤0.01% |
15,200
+9,400
| +162% | +$22.8K |
|
6528
PUT
Kulicke & Soffa
KLIC
$5.59B
| $26.3K | ﹤0.01% |
400
-700
| -64% | -$44.5K |
|
|
SEMR
6529
CALL
DELISTED
Semrush
SEMR
| $26.3K | ﹤0.01% |
2,200
-63,900
| -97% | -$760K |
|
6530
CALL
Journey Medical
DERM
$198M
| $26.3K | ﹤0.01% |
+5,600
| New | +$43.5K |
|
6531
CALL
TherapeuticsMD
TXMD
$23.6M
| $26.3K | ﹤0.01% |
13,000
+300
| +2% | +$675 |
|
6532
MYR Group
MYRG
$6.32B
| $26.3K | ﹤0.01% |
93
-314
| -77% | -$81.6K |
|
6533
Gain Therapeutics
GANX
$78.5M
| $26.1K | ﹤0.01% |
13,439
-34,507
| -72% | -$75.1K |
|
6534
CALL
Worthington Enterprises
WOR
$2.69B
| $26.1K | ﹤0.01% |
500
+100
| +25% | +$5.35K |
|
6535
PUT
Global Ship Lease
GSL
$1.52B
| $26.1K | ﹤0.01% |
700
-29,100
| -98% | -$1.1M |
|
|
GLIBK
6536
CALL
Liberty Capital Corp Series C GCI Group Common Stock
GLIBK
$900M
| $26K | ﹤0.01% |
700
+300
| +75% | +$11.3K |
|
6537
CALL
Middlesex Water
MSEX
$1.06B
| $26K | ﹤0.01% |
500
-1,400
| -74% | -$73.7K |
|
6538
PUT
Select Water Solutions
WTTR
$2.64B
| $26K | ﹤0.01% |
+1,700
| New | +$22.2K |
|
6539
PUT
FB Financial Corp
FBK
$2.92B
| $26K | ﹤0.01% |
+500
| New | +$28.1K |
|
|
TBCH
6540
Turtle Beach Corp
TBCH
$257M
| $25.9K | ﹤0.01% |
2,554
-1,851
| -42% | -$23K |
|
|
DHC
6541
PUT
Diversified Healthcare Trust
DHC
$2.25B
| $25.9K | ﹤0.01% |
3,900
-14,100
| -78% | -$89.4K |
|
6542
CALL
Commerce Bancshares
CBSH
$8.44B
| $25.8K | ﹤0.01% |
525
| – | – |
|
|
FPI
6543
CALL
Farmland Partners
FPI
$421M
| $25.8K | ﹤0.01% |
2,300
+500
| +28% | +$5.73K |
|
6544
E.W. Scripps
SSP
$289M
| $25.8K | ﹤0.01% |
6,930
+2,669
| +63% | +$9.85K |
|
6545
ReNew
RNW
$2.28B
| $25.8K | ﹤0.01% |
5,626
-302,212
| -98% | -$1.61M |
|
|
PAL
6546
CALL
Proficient Auto Logistics
PAL
$200M
| $25.8K | ﹤0.01% |
+3,800
| New | +$31.4K |
|
6547
CALL
Viant Technology
DSP
$219M
| $25.8K | ﹤0.01% |
2,300
-1,300
| -36% | -$14.4K |
|
6548
ProShares Short Ether Strategy ETF
SETH
$15.5M
| $25.7K | ﹤0.01% |
523
-1,071
| -67% | -$52.2K |
|
6549
Jasper Therapeutics
JSPR
$24.6M
| $25.6K | ﹤0.01% |
+29,273
| New | +$40.6K |
|
6550
CALL
Manitowoc
MTW
$497M
| $25.6K | ﹤0.01% |
2,200
-1,800
| -45% | -$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.