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 | |
|---|---|---|---|---|---|---|
2726
CALL
American Resources Corp
AREC
$183M
| $801K | ﹤0.01% |
331,000
+44,100
| +15% | +$140K |
|
2727
CALL
Ecolab
ECL
$79.8B
| $798K | ﹤0.01% |
3,000
+1,600
| +114% | +$452K |
|
2728
Maplebear
CART
$10.7B
| $798K | ﹤0.01% |
+21,303
| New | +$808K |
|
2729
Direxion Daily AAPL Bull 2X ETF
AAPU
$194M
| $797K | ﹤0.01% |
28,408
-15,476
| -35% | -$468K |
|
|
SLI
2730
CALL
Standard Lithium
SLI
$475M
| $795K | ﹤0.01% |
233,200
+17,800
| +8% | +$79.7K |
|
2731
CALL
ICICI Bank
IBN
$107B
| $795K | ﹤0.01% |
30,700
-58,900
| -66% | -$1.73M |
|
2732
CALL
Vir Biotechnology
VIR
$1.46B
| $794K | ﹤0.01% |
88,600
+22,700
| +34% | +$181K |
|
2733
PUT
Transportadora de Gas del Sur
TGS
$4.48B
| $793K | ﹤0.01% |
22,900
-5,800
| -20% | -$178K |
|
2734
PUT
Atlas Lithium Corp
ATLX
$75.5M
| $792K | ﹤0.01% |
182,100
+170,100
| +1,418% | +$853K |
|
|
PEW
2735
PUT
GrabAGun Digital Holdings
PEW
$72.6M
| $792K | ﹤0.01% |
263,000
+257,200
| +4,434% | +$779K |
|
|
BLSH
2736
Bullish
BLSH
$3.31B
| $790K | ﹤0.01% |
+22,117
| New | +$776K |
|
2737
CALL
Compass Diversified
CODI
$752M
| $789K | ﹤0.01% |
100,400
-177,900
| -64% | -$1.13M |
|
2738
CALL
DoubleVerify
DV
$1.77B
| $789K | ﹤0.01% |
83,000
+50,000
| +152% | +$511K |
|
2739
PUT
Zura Bio
ZURA
$504M
| $788K | ﹤0.01% |
132,500
-68,900
| -34% | -$416K |
|
|
BBBY
2740
Bed Bath & Beyond
BBBY
$479M
| $787K | ﹤0.01% |
+169,518
| New | +$948K |
|
2741
CALL
Iron Mountain
IRM
$35.9B
| $786K | ﹤0.01% |
7,700
-7,400
| -49% | -$736K |
|
2742
PUT
Western Midstream Partners
WES
$19.4B
| $786K | ﹤0.01% |
+19,100
| New | +$790K |
|
2743
CALL
Aquestive Therapeutics
AQST
$452M
| $786K | ﹤0.01% |
189,400
-46,900
| -20% | -$190K |
|
2744
Vestis
VSTS
$1.97B
| $785K | ﹤0.01% |
+99,930
| New | +$730K |
|
2745
PUT
Exelon
EXC
$48.1B
| $784K | ﹤0.01% |
16,000
-42,000
| -72% | -$1.95M |
|
2746
Acadia Healthcare
ACHC
$2.55B
| $783K | ﹤0.01% |
+33,460
| New | +$606K |
|
2747
CALL
Genuine Parts
GPC
$17.9B
| $783K | ﹤0.01% |
7,400
+3,800
| +106% | +$470K |
|
2748
CALL
Rithm Capital
RITM
$5.58B
| $782K | ﹤0.01% |
82,500
-39,300
| -32% | -$411K |
|
|
MRSH
2749
PUT
Marsh
MRSH
$94.3B
| $781K | ﹤0.01% |
4,500
-2,400
| -35% | -$431K |
|
|
ETH
2750
PUT
Grayscale Ethereum Staking Mini ETF Shares
ETH
$1.72B
| $780K | ﹤0.01% |
+39,300
| New | +$890K |
|
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.