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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1876
CALL
Enovix
ENVX
$603M
| $1.88M | ﹤0.01% |
363,200
-223,500
| -38% | -$1.4M |
|
1877
CALL
PPG Industries
PPG
$23.6B
| $1.88M | ﹤0.01% |
17,600
-10,500
| -37% | -$1.19M |
|
|
NNE
1878
CALL
Nano Nuclear Energy
NNE
$848M
| $1.88M | ﹤0.01% |
91,800
-94,700
| -51% | -$2.58M |
|
1879
CALL
Elastic
ESTC
$9.32B
| $1.88M | ﹤0.01% |
37,600
-19,600
| -34% | -$1.2M |
|
1880
PUT
Goodyear
GT
$1.44B
| $1.88M | ﹤0.01% |
283,500
-13,000
| -4% | -$110K |
|
1881
PUT
State Street Multi-Asset Real Return ETF
RLY
$1.38B
| $1.88M | ﹤0.01% |
46,800
+42,300
| +940% | +$1.47M |
|
1882
CALL
Black Hills Corp
BKH
$5.36B
| $1.87M | ﹤0.01% |
26,900
+20,500
| +320% | +$1.48M |
|
1883
PUT
Viavi Solutions
VIAV
$10.3B
| $1.87M | ﹤0.01% |
56,100
+53,800
| +2,339% | +$1.42M |
|
1884
CALL
BILL Holdings
BILL
$3.57B
| $1.87M | ﹤0.01% |
48,700
-196,600
| -80% | -$8.79M |
|
1885
Verisk Analytics
VRSK
$21.6B
| $1.86M | ﹤0.01% |
9,813
+8,794
| +863% | +$1.78M |
|
|
LAR
1886
CALL
Lithium Argentina AG
LAR
$901M
| $1.86M | ﹤0.01% |
278,000
+136,300
| +96% | +$975K |
|
1887
PUT
Brown-Forman Class B
BF.B
$12.1B
| $1.86M | ﹤0.01% |
70,200
+37,400
| +114% | +$1M |
|
1888
PUT
Toll Brothers
TOL
$12.5B
| $1.86M | ﹤0.01% |
13,600
-87,500
| -87% | -$12.8M |
|
1889
PUT
GE HealthCare
GEHC
$30B
| $1.85M | ﹤0.01% |
+26,000
| New | +$2.05M |
|
1890
CALL
Sonoco
SON
$4.91B
| $1.85M | ﹤0.01% |
34,200
+21,300
| +165% | +$1.1M |
|
|
CHYM
1891
CALL
Chime Financial
CHYM
$10B
| $1.85M | ﹤0.01% |
98,700
-17,300
| -15% | -$392K |
|
1892
CALL
Emcor
EME
$33.6B
| $1.85M | ﹤0.01% |
2,500
-300
| -11% | -$218K |
|
1893
CALL
abrdn Physical Palladium Shares ETF
PALL
$638M
| $1.85M | ﹤0.01% |
68,500
-220,000
| -76% | -$6.81M |
|
1894
PUT
Zeta Global
ZETA
$7.27B
| $1.85M | ﹤0.01% |
115,900
-57,500
| -33% | -$1.06M |
|
1895
CALL
Smith & Wesson
SWBI
$630M
| $1.84M | ﹤0.01% |
128,400
+63,600
| +98% | +$773K |
|
1896
CALL
Owens Corning
OC
$9.36B
| $1.84M | ﹤0.01% |
17,000
-600
| -3% | -$71.5K |
|
1897
US Bancorp
USB
$90.6B
| $1.84M | ﹤0.01% |
35,317
+28,761
| +439% | +$1.58M |
|
1898
CALL
Clorox
CLX
$9.87B
| $1.83M | ﹤0.01% |
17,700
-12,200
| -41% | -$1.38M |
|
1899
CALL
Bath & Body Works
BBWI
$3.22B
| $1.83M | ﹤0.01% |
98,000
-74,600
| -43% | -$1.61M |
|
|
XXI
1900
CALL
Twenty One Capital Inc
XXI
$2.26B
| $1.83M | ﹤0.01% |
285,600
+180,900
| +173% | +$1.33M |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.