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 | |
|---|---|---|---|---|---|---|
1601
PUT
Golar LNG
GLNG
$4.95B
| $2.6M | ﹤0.01% |
48,100
-73,500
| -60% | -$3.24M |
|
1602
CALL
Weyerhaeuser
WY
$17.3B
| $2.6M | ﹤0.01% |
106,500
-20,600
| -16% | -$518K |
|
1603
2x Bitcoin ETF
BITX
$919M
| $2.6M | ﹤0.01% |
+176,377
| New | +$3.6M |
|
1604
PUT
Warrior Met Coal
HCC
$4.23B
| $2.6M | ﹤0.01% |
27,900
+25,800
| +1,229% | +$2.32M |
|
1605
PUT
Vaxcyte
PCVX
$7.89B
| $2.6M | ﹤0.01% |
44,700
+38,300
| +598% | +$2.08M |
|
1606
CALL
Deckers Outdoor
DECK
$13.3B
| $2.59M | ﹤0.01% |
25,900
-101,000
| -80% | -$10.8M |
|
|
1607
PUT
Deckers Outdoor
DECK
$13.3B
| $2.59M | ﹤0.01% |
25,900
-54,800
| -68% | -$5.88M |
|
1608
CALL
Edwards Lifesciences
EW
$47.6B
| $2.59M | ﹤0.01% |
32,300
-45,400
| -58% | -$3.74M |
|
1609
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $2.58M | ﹤0.01% |
+13,200
| New | +$2.46M |
|
1610
CALL
Huntsman Corp
HUN
$2.24B
| $2.58M | ﹤0.01% |
193,700
+900
| +0.5% | +$10.9K |
|
|
KEEL
1611
Keel Infrastructure Corp
KEEL
$2.57B
| $2.58M | ﹤0.01% |
1,321,654
-265,867
| -17% | -$625K |
|
1612
AES
AES
$10.6B
| $2.57M | ﹤0.01% |
182,416
-136,639
| -43% | -$2.03M |
|
1613
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $2.57M | ﹤0.01% |
48,800
+38,900
| +393% | +$1.45M |
|
1614
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $2.57M | ﹤0.01% |
+55,300
| New | +$2.92M |
|
1615
CALL
Edison International
EIX
$30.7B
| $2.56M | ﹤0.01% |
35,000
-44,600
| -56% | -$3.01M |
|
1616
PUT
Generac Holdings
GNRC
$11.9B
| $2.56M | ﹤0.01% |
13,100
-29,200
| -69% | -$5.61M |
|
1617
ProShares UltraPro Short S&P 500
SPXU
$436M
| $2.56M | ﹤0.01% |
45,074
+8,454
| +23% | +$428K |
|
1618
CALL
United States Brent Oil Fund
BNO
$815M
| $2.55M | ﹤0.01% |
49,100
+46,900
| +2,132% | +$1.74M |
|
1619
CALL
VICI Properties
VICI
$29.4B
| $2.55M | ﹤0.01% |
93,400
-80,400
| -46% | -$2.3M |
|
1620
CALL
Teck Resources
TECK
$29.5B
| $2.55M | ﹤0.01% |
49,300
-112,900
| -70% | -$6.04M |
|
|
STUB
1621
CALL
StubHub Holdings
STUB
$3.1B
| $2.55M | ﹤0.01% |
408,600
+191,000
| +88% | +$1.99M |
|
1622
CALL
LSB Industries
LXU
$881M
| $2.55M | ﹤0.01% |
171,100
+1,300
| +0.8% | +$14.8K |
|
1623
CALL
Clear Secure
YOU
$5.26B
| $2.55M | ﹤0.01% |
52,600
-29,700
| -36% | -$1.18M |
|
1624
PUT
Royal Gold
RGLD
$17.1B
| $2.54M | ﹤0.01% |
10,000
-4,400
| -31% | -$1.17M |
|
1625
PUT
M&T Bank
MTB
$36.2B
| $2.54M | ﹤0.01% |
12,300
+3,400
| +38% | +$732K |
|
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.