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 | |
|---|---|---|---|---|---|---|
1951
PUT
Navitas Semiconductor
NVTS
$2.73B
| $1.73M | ﹤0.01% |
197,200
-122,500
| -38% | -$1.13M |
|
1952
ProShares UltraPro Short Dow 30
SDOW
$165M
| $1.73M | ﹤0.01% |
49,056
+31,835
| +185% | +$999K |
|
|
HTGCR
1953
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.72M | ﹤0.01% |
116,700
+77,500
| +198% | +$1.14M |
|
1954
PUT
United States Brent Oil Fund
BNO
$763M
| $1.72M | ﹤0.01% |
33,100
+32,300
| +4,038% | +$1.2M |
|
1955
CALL
Arcus Biosciences
RCUS
$3.61B
| $1.72M | ﹤0.01% |
79,700
+31,700
| +66% | +$685K |
|
1956
Dave Inc
DAVE
$5.14B
| $1.72M | ﹤0.01% |
9,885
+1,458
| +17% | +$283K |
|
1957
CALL
Mercury Insurance
MCY
$5.99B
| $1.72M | ﹤0.01% |
+19,500
| New | +$1.74M |
|
1958
PUT
Red Cat Holdings
RCAT
$1.17B
| $1.72M | ﹤0.01% |
131,300
-92,300
| -41% | -$1.26M |
|
1959
CALL
Zevra Therapeutics
ZVRA
$578M
| $1.71M | ﹤0.01% |
184,000
+19,600
| +12% | +$177K |
|
1960
PUT
Zoetis
ZTS
$32.5B
| $1.71M | ﹤0.01% |
14,500
-10,000
| -41% | -$1.24M |
|
1961
PUT
Toast
TOST
$17.7B
| $1.71M | ﹤0.01% |
64,600
-76,100
| -54% | -$2.27M |
|
1962
PUT
POET Technologies
POET
$1.19B
| $1.71M | ﹤0.01% |
288,200
-41,200
| -13% | -$267K |
|
1963
Clearway Energy Class C
CWEN
$5.04B
| $1.71M | ﹤0.01% |
+43,489
| New | +$1.62M |
|
1964
PUT
F5
FFIV
$22.4B
| $1.71M | ﹤0.01% |
5,900
+2,200
| +59% | +$610K |
|
1965
CALL
Toll Brothers
TOL
$14.2B
| $1.71M | ﹤0.01% |
12,500
-46,300
| -79% | -$6.8M |
|
1966
CALL
Bank of Montreal
BMO
$125B
| $1.71M | ﹤0.01% |
12,600
-3,700
| -23% | -$514K |
|
|
MIAX
1967
PUT
Miami International Holdings
MIAX
$4.11B
| $1.7M | ﹤0.01% |
43,800
+38,800
| +776% | +$1.6M |
|
1968
3M
MMM
$91.1B
| $1.7M | ﹤0.01% |
11,710
-61,882
| -84% | -$9.85M |
|
1969
CALL
Energy Vault
NRGV
$509M
| $1.7M | ﹤0.01% |
515,200
+501,300
| +3,606% | +$2.07M |
|
1970
PUT
Star Bulk Carriers
SBLK
$3.01B
| $1.7M | ﹤0.01% |
74,000
+10,400
| +16% | +$237K |
|
1971
iShares 3-7 Year Treasury Bond ETF
IEI
$18.1B
| $1.7M | ﹤0.01% |
14,320
+6,455
| +82% | +$770K |
|
1972
Consolidated Edison
ED
$41.5B
| $1.7M | ﹤0.01% |
14,983
+8,099
| +118% | +$877K |
|
1973
CALL
Compass
COMP
$8.76B
| $1.7M | ﹤0.01% |
231,900
-660,400
| -74% | -$6.94M |
|
1974
ProShares UltraShort Bloomberg Crude Oil
SCO
$685M
| $1.7M | ﹤0.01% |
50,935
+50,772
| +31,148% | +$2.85M |
|
1975
Amer Sports
AS
$20.5B
| $1.69M | ﹤0.01% |
51,485
+38,448
| +295% | +$1.4M |
|
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.