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 | |
|---|---|---|---|---|---|---|
26
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $773M | 0.52% |
12,980,200
+1,461,900
| +13% | +$73.3M |
|
|
27
PUT
Netflix
NFLX
$286B
| $728M | 0.49% |
7,568,800
-2,491,100
| -25% | -$219M |
|
28
PUT
iShares Silver Trust
SLV
$28.4B
| $718M | 0.48% |
10,536,200
-774,000
| -7% | -$58.8M |
|
29
PUT
Micron Technology
MU
$1.1T
| $715M | 0.48% |
2,117,000
+375,900
| +22% | +$147M |
|
|
30
CALL
Netflix
NFLX
$286B
| $713M | 0.48% |
7,413,400
-2,311,400
| -24% | -$204M |
|
31
PUT
Palantir
PLTR
$318B
| $710M | 0.48% |
4,851,200
-1,221,100
| -20% | -$187M |
|
32
PUT
Advanced Micro Devices
AMD
$888B
| $708M | 0.48% |
3,480,900
-305,300
| -8% | -$65.2M |
|
|
33
CALL
Micron Technology
MU
$1.1T
| $685M | 0.46% |
2,027,800
+627,200
| +45% | +$246M |
|
34
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $680M | 0.46% |
1,468,000
+781,700
| +114% | +$379M |
|
|
35
PUT
Broadcom
AVGO
$1.84T
| $649M | 0.44% |
2,097,100
-1,560,800
| -43% | -$514M |
|
|
36
CALL
Advanced Micro Devices
AMD
$888B
| $600M | 0.4% |
2,947,600
-1,619,100
| -35% | -$346M |
|
|
37
CALL
Palantir
PLTR
$318B
| $583M | 0.39% |
3,985,500
-2,181,600
| -35% | -$334M |
|
|
38
CALL
Broadcom
AVGO
$1.84T
| $520M | 0.35% |
1,679,500
-921,100
| -35% | -$303M |
|
39
CALL
UnitedHealth
UNH
$396B
| $519M | 0.35% |
1,919,000
-868,700
| -31% | -$259M |
|
40
PUT
Strategy Inc
MSTR
$37B
| $517M | 0.35% |
4,152,700
+301,500
| +8% | +$43.1M |
|
41
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $509M | 0.34% |
6,323,600
+996,000
| +19% | +$95.4M |
|
42
CALL
iShares Bitcoin Trust
IBIT
$48.9B
| $506M | 0.34% |
13,159,700
-4,730,400
| -26% | -$205M |
|
|
43
PUT
TSMC
TSM
$2.2T
| $498M | 0.33% |
+1,475,000
| New | +$508M |
|
44
PUT
United States Oil Fund
USO
$2.31B
| $417M | 0.28% |
3,279,200
+2,759,700
| +531% | +$245M |
|
45
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $401M | 0.27% |
2,710,700
+175,900
| +7% | +$17.3M |
|
46
PUT
Oracle
ORCL
$366B
| $383M | 0.26% |
2,604,900
+372,300
| +17% | +$60.5M |
|
|
47
PUT
iShares Bitcoin Trust
IBIT
$48.9B
| $382M | 0.26% |
9,930,300
+1,269,800
| +15% | +$55M |
|
|
48
CALL
Oracle
ORCL
$366B
| $352M | 0.24% |
2,392,600
-484,800
| -17% | -$78.8M |
|
49
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $341M | 0.23% |
6,594,400
+2,752,700
| +72% | +$77.3M |
|
50
PUT
Alibaba
BABA
$283B
| $333M | 0.22% |
2,657,200
+98,000
| +4% | +$14.7M |
|
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.