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 | |
|---|---|---|---|---|---|---|
1276
CALL
Li Auto
LI
$11.2B
| $4.53M | ﹤0.01% |
386,100
-264,100
| -41% | -$4.33M |
|
1277
CALL
B2Gold
BTG
$7.24B
| $4.52M | ﹤0.01% |
1,207,300
-1,182,100
| -49% | -$5.42M |
|
1278
PUT
Bilibili
BILI
$6.14B
| $4.5M | ﹤0.01% |
264,200
+26,600
| +11% | +$539K |
|
1279
iShares MSCI Japan ETF
EWJ
$23.5B
| $4.49M | ﹤0.01% |
+48,127
| New | +$4.37M |
|
1280
Global X Silver Miners ETF NEW
SIL
$4.78B
| $4.48M | ﹤0.01% |
57,793
+40,269
| +230% | +$3.62M |
|
1281
CALL
Wheaton Precious Metals
WPM
$64.9B
| $4.47M | ﹤0.01% |
39,800
-50,700
| -56% | -$6.6M |
|
1282
PUT
Quanta Services
PWR
$97.6B
| $4.46M | ﹤0.01% |
6,200
+200
| +3% | +$137K |
|
|
JPGE
1283
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $4.45M | ﹤0.01% |
78,700
+58,400
| +288% | +$3.3M |
|
1284
CALL
Banco Santander
SAN
$209B
| $4.44M | ﹤0.01% |
321,800
+203,400
| +172% | +$2.52M |
|
1285
PUT
KB Home
KBH
$2.92B
| $4.43M | ﹤0.01% |
70,800
-1,000
| -1% | -$52K |
|
1286
CALL
Intercontinental Exchange
ICE
$86.6B
| $4.42M | ﹤0.01% |
35,900
+4,200
| +13% | +$630K |
|
1287
CALL
Peloton Interactive
PTON
$2.16B
| $4.42M | ﹤0.01% |
747,600
-216,300
| -22% | -$1.17M |
|
1288
PUT
Keysight
KEYS
$61.7B
| $4.41M | ﹤0.01% |
12,600
+4,900
| +64% | +$1.67M |
|
1289
CALL
MasTec
MTZ
$17.1B
| $4.41M | ﹤0.01% |
10,600
+7,200
| +212% | +$2.75M |
|
1290
PUT
Enbridge
ENB
$104B
| $4.41M | ﹤0.01% |
81,300
+30,500
| +60% | +$1.67M |
|
1291
CALL
Rambus
RMBS
$11.4B
| $4.41M | ﹤0.01% |
33,200
+25,200
| +315% | +$3.28M |
|
1292
CALL
Knight Transportation
KNX
$10.4B
| $4.39M | ﹤0.01% |
56,400
+41,200
| +271% | +$2.86M |
|
1293
AeroVironment
AVAV
$7.73B
| $4.39M | ﹤0.01% |
26,573
+13,082
| +97% | +$2.34M |
|
1294
PUT
Lithia Motors
LAD
$6.96B
| $4.39M | ﹤0.01% |
15,100
+2,800
| +23% | +$796K |
|
1295
PUT
Pool Corp
POOL
$5.99B
| $4.38M | ﹤0.01% |
20,400
+3,400
| +20% | +$678K |
|
1296
CALL
SK Telecom
SKM
$13.9B
| $4.38M | ﹤0.01% |
136,100
+56,000
| +70% | +$2.07M |
|
1297
CALL
Alamos Gold
AGI
$14.4B
| $4.38M | ﹤0.01% |
144,200
-53,400
| -27% | -$2.16M |
|
1298
CALL
SGHC Ltd
SGHC
$6.08B
| $4.37M | ﹤0.01% |
322,700
-587,100
| -65% | -$7.44M |
|
1299
CALL
Elevance Health
ELV
$85.9B
| $4.37M | ﹤0.01% |
11,300
-39,000
| -78% | -$14.5M |
|
1300
CALL
AbCellera Biologics
ABCL
$4.12B
| $4.37M | ﹤0.01% |
556,300
+255,800
| +85% | +$1.25M |
|
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.