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 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2251
PUT
Grayscale Bitcoin Trust
GBTC
$12.6B
| $1.62M | ﹤0.01% |
35,600
+26,200
| +279% | +$1.46M |
|
2252
CALL
Digital Turbine
APPS
$1.34B
| $1.62M | ﹤0.01% |
125,400
+65,200
| +108% | +$390K |
|
2253
Mobileye
MBLY
$6.83B
| $1.62M | ﹤0.01% |
167,092
-162,231
| -49% | -$1.45M |
|
|
CRON
2254
CALL
Cronos Group
CRON
$1.23B
| $1.62M | ﹤0.01% |
581,800
-120,200
| -17% | -$322K |
|
2255
PUT
Boyd Gaming
BYD
$5.18B
| $1.62M | ﹤0.01% |
18,300
-72,000
| -80% | -$6.13M |
|
2256
PUT
Galicia Financial Group
GGAL
$6.22B
| $1.62M | ﹤0.01% |
32,300
-13,800
| -30% | -$649K |
|
|
SCHW
2257
Charles Schwab
SCHW
$171B
| $1.61M | ﹤0.01% |
+17,455
| New | +$1.59M |
|
2258
CALL
Entegris
ENTG
$23.2B
| $1.6M | ﹤0.01% |
8,900
-300
| -3% | -$43.3K |
|
2259
CALL
Toyota
TM
$225B
| $1.6M | ﹤0.01% |
9,500
-3,900
| -29% | -$739K |
|
2260
PUT
TransDigm Group
TDG
$61.7B
| $1.6M | ﹤0.01% |
1,200
-2,300
| -66% | -$2.82M |
|
2261
CALL
Gen Digital
GEN
$12.9B
| $1.6M | ﹤0.01% |
64,100
+44,700
| +230% | +$999K |
|
|
JBTM
2262
CALL
JBT Marel
JBTM
$5.71B
| $1.59M | ﹤0.01% |
11,000
-5,600
| -34% | -$725K |
|
2263
ProShares UltraShort Bloomberg Crude Oil
SCO
$1.07B
| $1.59M | ﹤0.01% |
45,503
-5,432
| -11% | -$157K |
|
2264
PUT
Corvus Pharmaceuticals
CRVS
$977M
| $1.59M | ﹤0.01% |
106,400
-6,900
| -6% | -$95.8K |
|
|
AEVA
2265
CALL
Aeva Technologies
AEVA
$1.07B
| $1.58M | ﹤0.01% |
55,100
+28,500
| +107% | +$561K |
|
2266
CALL
TD Synnex
SNX
$20.8B
| $1.58M | ﹤0.01% |
5,900
+5,700
| +2,850% | +$1.37M |
|
2267
PUT
Banco Bilbao Vizcaya Argentaria
BBVA
$159B
| $1.57M | ﹤0.01% |
62,800
-3,500
| -5% | -$79.8K |
|
2268
argenx
ARGX
$60B
| $1.57M | ﹤0.01% |
1,696
-75
| -4% | -$61.9K |
|
2269
PUT
Cenovus Energy
CVE
$57B
| $1.57M | ﹤0.01% |
63,400
-40,000
| -39% | -$1.1M |
|
2270
CALL
Illinois Tool Works
ITW
$78.1B
| $1.57M | ﹤0.01% |
5,800
-27,800
| -83% | -$7.21M |
|
2271
CALL
nLIGHT
LASR
$2.33B
| $1.57M | ﹤0.01% |
22,500
+12,600
| +127% | +$879K |
|
|
2272
PUT
Toyota
TM
$225B
| $1.57M | ﹤0.01% |
9,300
-2,500
| -21% | -$474K |
|
2273
CALL
SiTime
SITM
$19.9B
| $1.57M | ﹤0.01% |
2,100
+1,700
| +425% | +$1.07M |
|
2274
CALL
ArriVent BioPharma
AVBP
$1.4B
| $1.56M | ﹤0.01% |
45,000
+15,500
| +53% | +$457K |
|
2275
CALL
Shake Shack
SHAK
$2.24B
| $1.56M | ﹤0.01% |
27,900
+6,000
| +27% | +$452K |
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.