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 | |
|---|---|---|---|---|---|---|
51
PUT
UnitedHealth
UNH
$396B
| $314M | 0.21% |
1,160,600
-463,300
| -29% | -$138M |
|
52
CALL
Intel
INTC
$530B
| $304M | 0.2% |
6,898,000
-4,428,800
| -39% | -$203M |
|
53
CALL
Alibaba
BABA
$283B
| $303M | 0.2% |
2,418,700
-1,064,300
| -31% | -$160M |
|
|
KFYP
54
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $276M | 0.19% |
9,703,100
+4,336,700
| +81% | +$123M |
|
55
CALL
ExxonMobil
XOM
$629B
| $269M | 0.18% |
1,587,500
+553,800
| +54% | +$80.8M |
|
56
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $267M | 0.18% |
3,741,800
+1,585,600
| +74% | +$44.6M |
|
57
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $265M | 0.18% |
3,161,400
-1,872,600
| -37% | -$510M |
|
|
58
NVIDIA
NVDA
$5.02T
| $263M | 0.18% |
1,509,153
+768,382
| +104% | +$141M |
|
59
CALL
United States Oil Fund
USO
$2.31B
| $257M | 0.17% |
2,021,300
+1,749,400
| +643% | +$155M |
|
|
60
CALL
TSMC
TSM
$2.2T
| $255M | 0.17% |
+755,000
| New | +$260M |
|
61
PUT
ASML
ASML
$692B
| $238M | 0.16% |
180,200
-84,500
| -32% | -$116M |
|
62
CALL
Goldman Sachs
GS
$320B
| $229M | 0.15% |
271,000
+66,200
| +32% | +$59.1M |
|
|
63
PUT
ExxonMobil
XOM
$629B
| $222M | 0.15% |
1,305,700
+57,500
| +5% | +$8.39M |
|
64
PUT
JPMorgan Chase
JPM
$918B
| $221M | 0.15% |
752,200
+18,600
| +3% | +$5.64M |
|
|
65
PUT
Goldman Sachs
GS
$320B
| $201M | 0.13% |
237,600
-59,600
| -20% | -$53.2M |
|
|
CRWV
66
CALL
CoreWeave
CRWV
$43.4B
| $196M | 0.13% |
2,535,100
+681,900
| +37% | +$59.2M |
|
67
PUT
Citigroup
C
$223B
| $193M | 0.13% |
1,701,500
-540,800
| -24% | -$61.6M |
|
|
68
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $183M | 0.12% |
1,865,500
-813,700
| -30% | -$222M |
|
|
69
PUT
Intel
INTC
$530B
| $182M | 0.12% |
4,134,300
-1,458,600
| -26% | -$66.9M |
|
|
SNDK
70
PUT
Sandisk
SNDK
$235B
| $182M | 0.12% |
286,200
+54,500
| +24% | +$30.8M |
|
|
71
CALL
Citigroup
C
$223B
| $181M | 0.12% |
1,599,300
-1,068,600
| -40% | -$122M |
|
72
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $181M | 0.12% |
377,000
-264,300
| -41% | -$130M |
|
73
CALL
Strategy Inc
MSTR
$37B
| $176M | 0.12% |
1,435,600
-1,399,600
| -49% | -$200M |
|
|
CRWV
74
PUT
CoreWeave
CRWV
$43.4B
| $175M | 0.12% |
2,262,000
+832,200
| +58% | +$72.2M |
|
75
PUT
Coinbase
COIN
$46.3B
| $174M | 0.12% |
996,500
+132,900
| +15% | +$26.2M |
|
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.