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 | |
|---|---|---|---|---|---|---|
2426
PUT
Amer Sports
AS
$20.3B
| $1.08M | ﹤0.01% |
32,800
+4,300
| +15% | +$157K |
|
2427
PUT
Alamos Gold
AGI
$11.8B
| $1.08M | ﹤0.01% |
24,300
-8,000
| -25% | -$353K |
|
2428
PUT
International Seaways
INSW
$4.62B
| $1.08M | ﹤0.01% |
14,800
+13,600
| +1,133% | +$870K |
|
2429
CALL
Entegris
ENTG
$16.7B
| $1.08M | ﹤0.01% |
9,200
-14,300
| -61% | -$1.69M |
|
2430
CALL
Post Holdings
POST
$4.32B
| $1.08M | ﹤0.01% |
+10,900
| New | +$1.11M |
|
2431
PUT
Burford Capital
BUR
$920M
| $1.08M | ﹤0.01% |
238,200
+61,800
| +35% | +$541K |
|
2432
PUT
FS KKR Capital
FSK
$3.04B
| $1.08M | ﹤0.01% |
105,700
+41,600
| +65% | +$521K |
|
2433
Innodata
INOD
$1.78B
| $1.07M | ﹤0.01% |
+27,833
| New | +$1.39M |
|
2434
PUT
Virgin Galactic
SPCE
$314M
| $1.07M | ﹤0.01% |
+439,900
| New | +$1.19M |
|
2435
Comstock
LODE
$213M
| $1.07M | ﹤0.01% |
349,326
+336,313
| +2,584% | +$1.1M |
|
2436
PUT
Advanced Energy
AEIS
$10.3B
| $1.06M | ﹤0.01% |
+3,300
| New | +$956K |
|
2437
CALL
Encompass Health
EHC
$11.5B
| $1.06M | ﹤0.01% |
11,000
+10,800
| +5,400% | +$1.11M |
|
2438
CALL
Mitek Systems
MITK
$757M
| $1.06M | ﹤0.01% |
78,700
+77,200
| +5,147% | +$955K |
|
2439
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $1.06M | ﹤0.01% |
9,700
+9,000
| +1,286% | +$791K |
|
2440
CALL
Bank OZK
OZK
$5.62B
| $1.06M | ﹤0.01% |
23,100
-32,900
| -59% | -$1.55M |
|
2441
CALL
Prime Medicine
PRME
$540M
| $1.06M | ﹤0.01% |
304,000
+134,700
| +80% | +$513K |
|
2442
CALL
ProShares UltraShort Health Care
RXD
$3.06M
| $1.06M | ﹤0.01% |
14,700
-31,850
| -68% | -$587K |
|
2443
Northrop Grumman
NOC
$77.4B
| $1.05M | ﹤0.01% |
1,545
-661
| -30% | -$457K |
|
|
HIMX
2444
CALL
Himax Technologies
HIMX
$2.03B
| $1.05M | ﹤0.01% |
133,900
-62,100
| -32% | -$510K |
|
2445
PUT
Revolve Group
RVLV
$1.86B
| $1.05M | ﹤0.01% |
46,600
+42,800
| +1,126% | +$1.12M |
|
2446
Virtu Financial
VIRT
$5.1B
| $1.05M | ﹤0.01% |
+23,920
| New | +$932K |
|
|
P
2447
PUT
Everpure Inc
P
$23.5B
| $1.05M | ﹤0.01% |
17,800
-129,500
| -88% | -$8.77M |
|
2448
Sasol
SSL
$7.44B
| $1.05M | ﹤0.01% |
81,063
+69,711
| +614% | +$609K |
|
2449
AZZ Inc
AZZ
$4.31B
| $1.05M | ﹤0.01% |
8,388
+8,282
| +7,813% | +$1.05M |
|
2450
CALL
AbCellera Biologics
ABCL
$1.63B
| $1.05M | ﹤0.01% |
300,500
-35,600
| -11% | -$128K |
|
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.