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 | |
|---|---|---|---|---|---|---|
5526
CALL
Westamerica Bancorp
WABC
$1.39B
| $67.8K | ﹤0.01% |
1,300
+1,200
| +1,200% | +$60.9K |
|
5527
PUT
Dycom Industries
DY
$12.9B
| $67.8K | ﹤0.01% |
200
| – | – |
|
|
LENZ
5528
CALL
LENZ Therapeutics
LENZ
$172M
| $67.7K | ﹤0.01% |
7,400
-69,400
| -90% | -$975K |
|
5529
MarineMax
HZO
$800M
| $67.7K | ﹤0.01% |
2,502
+2,207
| +748% | +$61.2K |
|
5530
CALL
Heartland Express
HTLD
$1.11B
| $67.6K | ﹤0.01% |
6,500
+6,400
| +6,400% | +$67.5K |
|
5531
PUT
Adecoagro
AGRO
$1.53B
| $67.6K | ﹤0.01% |
4,500
-10,400
| -70% | -$103K |
|
|
SOLT
5532
2x Solana ETF
SOLT
$113M
| $67.6K | ﹤0.01% |
+1,490
| New | +$124K |
|
|
NAKA
5533
CALL
Nakamoto Inc
NAKA
$84.7M
| $67.3K | ﹤0.01% |
7,618
-3,915
| -34% | -$49.6K |
|
5534
PUT
Prosperity Bancshares
PB
$8.77B
| $67.2K | ﹤0.01% |
1,000
| – | – |
|
5535
CALL
Angi Inc
ANGI
$224M
| $67.1K | ﹤0.01% |
9,800
+4,400
| +81% | +$44.1K |
|
5536
PUT
Navient
NAVI
$774M
| $67.1K | ﹤0.01% |
+8,200
| New | +$81.2K |
|
|
MREO
5537
CALL
Mereo BioPharma
MREO
$45.9M
| $67K | ﹤0.01% |
203,100
+35,800
| +21% | +$15.4K |
|
5538
CRISPR Therapeutics
CRSP
$4.58B
| $66.9K | ﹤0.01% |
+1,407
| New | +$74.2K |
|
5539
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $66.9K | ﹤0.01% |
1,100
-5,700
| -84% | -$369K |
|
5540
Lightbridge
LTBR
$246M
| $66.8K | ﹤0.01% |
6,263
-6,634
| -51% | -$92.2K |
|
5541
PUT
Gladstone Investment Corp
GAIN
$635M
| $66.7K | ﹤0.01% |
4,700
+2,100
| +81% | +$29.3K |
|
5542
CALL
US Commodity Index
USCI
$372M
| $66.7K | ﹤0.01% |
+700
| New | +$60K |
|
|
AVL
5543
Direxion Daily AVGO Bull 2X ETF
AVL
$194M
| $66.4K | ﹤0.01% |
2,021
-201
| -9% | -$7.77K |
|
5544
CALL
Saic
SAIC
$5.03B
| $66.4K | ﹤0.01% |
+700
| New | +$68.6K |
|
5545
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.59B
| $66.4K | ﹤0.01% |
+1,480
| New | +$67.3K |
|
5546
Allot
ALLT
$374M
| $66.3K | ﹤0.01% |
9,960
+8,023
| +414% | +$70.7K |
|
5547
CALL
Alector
ALEC
$164M
| $66.2K | ﹤0.01% |
30,800
-236,400
| -88% | -$475K |
|
5548
PUT
Odyssey Marine Exploration
OMEX
$40.4M
| $66.2K | ﹤0.01% |
79,400
-177,500
| -69% | -$302K |
|
5549
Frontier Group Holdings
ULCC
$1.34B
| $66.1K | ﹤0.01% |
18,739
-30,543
| -62% | -$140K |
|
5550
PUT
Regencell Bioscience
RGC
$2.83B
| $66.1K | ﹤0.01% |
+2,600
| New | +$73.6K |
|
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.