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 | |
|---|---|---|---|---|---|---|
1676
PUT
Nasdaq
NDAQ
$52.3B
| $2.82M | ﹤0.01% |
35,800
+32,400
| +953% | +$2.84M |
|
1677
CALL
Tractor Supply
TSCO
$16.8B
| $2.82M | ﹤0.01% |
89,200
+59,600
| +201% | +$2.06M |
|
1678
Global Payments
GPN
$22.9B
| $2.81M | ﹤0.01% |
38,750
+36,407
| +1,554% | +$2.51M |
|
1679
PUT
iShares Gold Trust
IAU
$63.6B
| $2.81M | ﹤0.01% |
37,200
-61,300
| -62% | -$5.2M |
|
1680
CALL
Pagaya Technologies
PGY
$1.47B
| $2.81M | ﹤0.01% |
153,700
-45,500
| -23% | -$646K |
|
1681
CALL
Adeia
ADEA
$2.81B
| $2.8M | ﹤0.01% |
85,100
+65,100
| +326% | +$1.92M |
|
1682
Wheaton Precious Metals
WPM
$64.9B
| $2.8M | ﹤0.01% |
+24,945
| New | +$3.25M |
|
1683
CALL
Array Technologies
ARRY
$621M
| $2.8M | ﹤0.01% |
378,000
+244,900
| +184% | +$1.95M |
|
1684
PUT
Labcorp
LH
$25.1B
| $2.8M | ﹤0.01% |
10,000
+9,800
| +4,900% | +$2.58M |
|
1685
Target Hospitality
TH
$2.02B
| $2.79M | ﹤0.01% |
137,230
+55,192
| +67% | +$923K |
|
1686
CALL
TripAdvisor
TRIP
$986M
| $2.79M | ﹤0.01% |
203,700
+161,100
| +378% | +$1.82M |
|
1687
PUT
Realty Income
O
$52.6B
| $2.79M | ﹤0.01% |
45,000
-3,500
| -7% | -$218K |
|
1688
Chipotle Mexican Grill
CMG
$39.6B
| $2.78M | ﹤0.01% |
81,841
-22,051
| -21% | -$720K |
|
1689
PUT
Dynatrace
DT
$16.7B
| $2.78M | ﹤0.01% |
63,300
+55,100
| +672% | +$2.15M |
|
1690
CALL
Cardinal Health
CAH
$51B
| $2.78M | ﹤0.01% |
11,700
-2,900
| -20% | -$603K |
|
1691
CALL
HF Sinclair
DINO
$19B
| $2.78M | ﹤0.01% |
39,900
+30,600
| +329% | +$2.03M |
|
1692
PUT
CarMax
KMX
$8.12B
| $2.78M | ﹤0.01% |
52,500
-48,900
| -48% | -$2.13M |
|
|
P
1693
PUT
Everpure Inc
P
$42B
| $2.77M | ﹤0.01% |
35,200
+17,400
| +98% | +$1.28M |
|
1694
CALL
Trip.com Group
TCOM
$24.8B
| $2.77M | ﹤0.01% |
69,600
-60,900
| -47% | -$3.02M |
|
1695
CALL
Pultegroup
PHM
$22.8B
| $2.77M | ﹤0.01% |
20,200
-29,400
| -59% | -$3.57M |
|
1696
PUT
Summit Therapeutics
SMMT
$12.5B
| $2.77M | ﹤0.01% |
190,000
+111,200
| +141% | +$1.97M |
|
1697
PUT
GXO Logistics
GXO
$5.18B
| $2.77M | ﹤0.01% |
54,600
+45,200
| +481% | +$2.34M |
|
|
MULL
1698
GraniteShares 2x Long MU Daily ETF
MULL
$840M
| $2.77M | ﹤0.01% |
75,169
-193,506
| -72% | -$3.84M |
|
1699
PUT
Hawaiian Electric Industries
HE
$1.57B
| $2.77M | ﹤0.01% |
204,400
-24,700
| -11% | -$352K |
|
1700
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.18B
| $2.76M | ﹤0.01% |
40,300
+23,500
| +140% | +$637K |
|
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.