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 | |
|---|---|---|---|---|---|---|
5601
PUT
H&R Block
HRB
$5.06B
| $63.5K | ﹤0.01% |
2,000
-34,500
| -95% | -$1.2M |
|
5602
CALL
Celldex Therapeutics
CLDX
$2.78B
| $63.4K | ﹤0.01% |
+2,000
| New | +$54.5K |
|
|
LENZ
5603
LENZ Therapeutics
LENZ
$158M
| $63.4K | ﹤0.01% |
+6,927
| New | +$97.3K |
|
5604
CALL
Exagen
XGN
$120M
| $63.3K | ﹤0.01% |
21,100
-10,700
| -34% | -$41.4K |
|
5605
Ryder
R
$10.4B
| $63.3K | ﹤0.01% |
309
-1
| -0.3% | -$202 |
|
5606
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
| $63.2K | ﹤0.01% |
+900
| New | +$64.1K |
|
5607
CALL
Trustmark
TRMK
$2.7B
| $63.2K | ﹤0.01% |
1,500
+100
| +7% | +$4.22K |
|
5608
CALL
BRC Inc
BRCC
$140M
| $63.2K | ﹤0.01% |
81,400
+59,100
| +265% | +$49.8K |
|
5609
RF Industries
RFIL
$141M
| $63.1K | ﹤0.01% |
+6,117
| New | +$62K |
|
5610
PUT
AptarGroup
ATR
$8.23B
| $63K | ﹤0.01% |
500
-16,300
| -97% | -$2.12M |
|
5611
CALL
Cincinnati Financial
CINF
$27.7B
| $62.9K | ﹤0.01% |
400
-3,000
| -88% | -$488K |
|
|
WAY
5612
Waystar Holding Corp
WAY
$4.14B
| $62.9K | ﹤0.01% |
2,608
-2,595
| -50% | -$68.9K |
|
5613
Northern Trust
NTRS
$21.9B
| $62.8K | ﹤0.01% |
+450
| New | +$64.7K |
|
5614
CALL
RLI Corp
RLI
$5.62B
| $62.7K | ﹤0.01% |
1,100
+600
| +120% | +$36K |
|
5615
CALL
Atlas Lithium Corp
ATLX
$83.2M
| $62.6K | ﹤0.01% |
14,400
-66,800
| -82% | -$335K |
|
5616
Vulcan Materials
VMC
$35.7B
| $62.6K | ﹤0.01% |
230
-555
| -71% | -$163K |
|
5617
CALL
Vuzix
VUZI
$191M
| $62.6K | ﹤0.01% |
27,100
-74,500
| -73% | -$203K |
|
|
AEVA
5618
Aeva Technologies
AEVA
$1.1B
| $62.5K | ﹤0.01% |
4,746
-16,585
| -78% | -$246K |
|
5619
Gambling.com
GAMB
$64.9M
| $62.4K | ﹤0.01% |
16,095
+14,578
| +961% | +$65.4K |
|
|
CWBC
5620
Community West Bancshares
CWBC
$722M
| $62.4K | ﹤0.01% |
+2,678
| New | +$62.6K |
|
|
RAL
5621
PUT
Ralliant Corp
RAL
$7.87B
| $62.4K | ﹤0.01% |
1,500
+1,100
| +275% | +$51.7K |
|
5622
CALL
Fortune Brands Innovations
FBIN
$5.94B
| $62.4K | ﹤0.01% |
+1,600
| New | +$83.2K |
|
5623
Banco de Chile
BCH
$20.5B
| $62.3K | ﹤0.01% |
1,683
-32,532
| -95% | -$1.34M |
|
5624
PUT
Perrigo
PRGO
$1.4B
| $62.3K | ﹤0.01% |
5,800
-27,400
| -83% | -$355K |
|
5625
Ironwood Pharmaceuticals
IRWD
$624M
| $62.2K | ﹤0.01% |
+17,724
| New | +$72.6K |
|
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.