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 | |
|---|---|---|---|---|---|---|
|
ETH
3726
PUT
Grayscale Ethereum Staking Mini ETF Shares
ETH
$2.25B
| $454K | ﹤0.01% |
30,200
-9,100
| -23% | -$178K |
|
3727
PUT
Brown-Forman Class B
BF.B
$11.9B
| $454K | ﹤0.01% |
17,000
-53,200
| -76% | -$1.43M |
|
3728
PUT
Charles River Laboratories
CRL
$14.1B
| $454K | ﹤0.01% |
2,000
| – | – |
|
3729
PUT
InMode
INMD
$818M
| $453K | ﹤0.01% |
31,000
-300
| -1% | -$4.19K |
|
3730
PUT
InterDigital
IDCC
$8.44B
| $453K | ﹤0.01% |
1,600
+400
| +33% | +$119K |
|
3731
Perma-Fix Environmental Services
PESI
$332M
| $452K | ﹤0.01% |
31,633
+315
| +1% | +$3.51K |
|
|
NESR
3732
CALL
National Energy Services Reunited Corp
NESR
$3.01B
| $452K | ﹤0.01% |
15,100
+14,800
| +4,933% | +$366K |
|
3733
PUT
Invesco DB Base Metals Fund
DBB
$368M
| $451K | ﹤0.01% |
19,200
-72,000
| -79% | -$1.81M |
|
|
SKE
3734
PUT
Skeena Resources
SKE
$3.75B
| $451K | ﹤0.01% |
16,900
-7,200
| -30% | -$216K |
|
3735
CALL
New Oriental
EDU
$8.66B
| $450K | ﹤0.01% |
9,800
-21,300
| -68% | -$1.08M |
|
3736
Cognex
CGNX
$9.88B
| $449K | ﹤0.01% |
6,198
+3,902
| +170% | +$237K |
|
3737
PUT
Corteva
CTVA
$51.9B
| $449K | ﹤0.01% |
5,300
-2,600
| -33% | -$209K |
|
3738
PUT
UWM Holdings
UWMC
$431M
| $449K | ﹤0.01% |
195,900
-70,200
| -26% | -$218K |
|
3739
PUT
Vornado Realty Trust
VNO
$6.37B
| $448K | ﹤0.01% |
11,400
-53,400
| -82% | -$1.73M |
|
3740
Arhaus
ARHS
$1.37B
| $448K | ﹤0.01% |
53,172
+45,848
| +626% | +$318K |
|
3741
Life Time Group Holdings
LTH
$8.85B
| $447K | ﹤0.01% |
10,954
+10,584
| +2,861% | +$336K |
|
3742
Blue Owl Capital
OBDC
$5.31B
| $447K | ﹤0.01% |
41,091
-95,551
| -70% | -$1.07M |
|
|
NXH
3743
Neighborhood Intelligence Inc
NXH
$300M
| $446K | ﹤0.01% |
77,058
-92,460
| -55% | -$507K |
|
3744
CALL
Simplify US Equity PLUS Convexity ETF
SPYC
$82.3M
| $446K | ﹤0.01% |
27,300
-21,000
| -43% | -$926K |
|
3745
PUT
Harrow
HROW
$1.18B
| $446K | ﹤0.01% |
10,500
-7,000
| -40% | -$260K |
|
3746
PUT
Structure Therapeutics
GPCR
$2.5B
| $445K | ﹤0.01% |
8,300
-700
| -8% | -$31K |
|
|
FRVO
3747
PUT
Fervo Energy
FRVO
$4.16B
| $444K | ﹤0.01% |
+15,200
| New | +$549K |
|
3748
CALL
BuzzFeed
BZFD
$88.3M
| $444K | ﹤0.01% |
304,300
+301,700
| +11,604% | +$347K |
|
3749
Tidewater
TDW
$4.14B
| $444K | ﹤0.01% |
6,667
-315
| -5% | -$25K |
|
3750
PUT
Unicycive Therapeutics
UNCY
$129M
| $444K | ﹤0.01% |
94,600
+13,400
| +17% | +$98.8K |
|
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.