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 | |
|---|---|---|---|---|---|---|
6651
PUT
AGCO
AGCO
$8.49B
| $23.2K | ﹤0.01% |
+200
| New | +$24.2K |
|
|
PAL
6652
Proficient Auto Logistics
PAL
$200M
| $23.2K | ﹤0.01% |
+3,417
| New | +$28.2K |
|
6653
Hyperfine
HYPR
$97.8M
| $23.1K | ﹤0.01% |
21,380
+19,593
| +1,096% | +$22.2K |
|
6654
CALL
Cumberland Pharmaceuticals
CPIX
$107M
| $23.1K | ﹤0.01% |
+7,100
| New | +$27.4K |
|
6655
Veralto
VLTO
$22.4B
| $23K | ﹤0.01% |
+260
| New | +$24.7K |
|
6656
CALL
Tyra Biosciences
TYRA
$1.87B
| $23K | ﹤0.01% |
600
+500
| +500% | +$16.2K |
|
6657
CALL
Belden
BDC
$4.05B
| $23K | ﹤0.01% |
200
+100
| +100% | +$12.6K |
|
|
TOPT
6658
iShares Top 20 U.S. Stocks ETF
TOPT
$680M
| $23K | ﹤0.01% |
802
-2,353
| -75% | -$70.9K |
|
6659
PUT
Grupo Aeroportuario Centro Norte
OMAB
$5.09B
| $22.9K | ﹤0.01% |
+200
| New | +$23.3K |
|
6660
CALL
Navient
NAVI
$803M
| $22.9K | ﹤0.01% |
2,800
+2,700
| +2,700% | +$26.7K |
|
6661
iMGP DBi Managed Futures Strategy ETF
DBMF
$3.95B
| $22.9K | ﹤0.01% |
759
+296
| +64% | +$8.87K |
|
6662
Comtech Telecommunications
CMTL
$50M
| $22.9K | ﹤0.01% |
+6,890
| New | +$35.4K |
|
6663
Quaker Houghton
KWR
$2.62B
| $22.9K | ﹤0.01% |
+184
| New | +$27.2K |
|
6664
Utz Brands
UTZ
$1.24B
| $22.8K | ﹤0.01% |
2,879
-18,329
| -86% | -$170K |
|
6665
PUT
Korea Electric Power
KEP
$15.2B
| $22.8K | ﹤0.01% |
1,600
-21,000
| -93% | -$397K |
|
6666
CALL
Boise Cascade
BCC
$2.7B
| $22.8K | ﹤0.01% |
300
+100
| +50% | +$8.01K |
|
6667
PUT
Seadrill
SDRL
$2.81B
| $22.8K | ﹤0.01% |
+500
| New | +$20.4K |
|
6668
PUT
Payoneer
PAYO
$2.41B
| $22.7K | ﹤0.01% |
4,700
-2,000
| -30% | -$10.5K |
|
6669
Atkore
ATKR
$2.47B
| $22.7K | ﹤0.01% |
385
-1,675
| -81% | -$109K |
|
|
MITT
6670
CALL
TPG Mortgage Investment Trust
MITT
$235M
| $22.7K | ﹤0.01% |
3,100
+200
| +7% | +$1.65K |
|
6671
CALL
National Storage Affiliates Trust
NSA
$3.37B
| $22.6K | ﹤0.01% |
600
-1,900
| -76% | -$64.2K |
|
6672
DXP Enterprises
DXPE
$2.71B
| $22.6K | ﹤0.01% |
+162
| New | +$21.7K |
|
6673
PUT
Diebold Nixdorf
DBD
$2.99B
| $22.6K | ﹤0.01% |
+300
| New | +$22.1K |
|
6674
PUT
Methode Electronics
MEI
$586M
| $22.6K | ﹤0.01% |
4,100
+3,100
| +310% | +$22.7K |
|
6675
CALL
Cambria Tail Risk ETF
TAIL
$145M
| $22.6K | ﹤0.01% |
300
-1,600
| -84% | -$18.5K |
|
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.