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 | |
|---|---|---|---|---|---|---|
4601
Merit Medical Systems
MMSI
$5.25B
| $219K | ﹤0.01% |
+3,158
| New | +$208K |
|
4602
CALL
W.R. Berkley
WRB
$25.3B
| $219K | ﹤0.01% |
3,100
-1,200
| -28% | -$80.4K |
|
|
SOLZ
4603
Solana ETF
SOLZ
$133M
| $219K | ﹤0.01% |
29,625
+28,370
| +2,261% | +$230K |
|
4604
PUT
Lamar Advertising Co
LAMR
$14.8B
| $218K | ﹤0.01% |
1,400
+300
| +27% | +$43.4K |
|
4605
PUT
Aquestive Therapeutics
AQST
$586M
| $218K | ﹤0.01% |
52,400
+41,400
| +376% | +$174K |
|
4606
CALL
ScottsMiracle-Gro
SMG
$2.88B
| $218K | ﹤0.01% |
3,200
+2,100
| +191% | +$130K |
|
4607
Murphy Oil
MUR
$5.15B
| $218K | ﹤0.01% |
+6,692
| New | +$256K |
|
4608
abrdn Physical Silver Shares ETF
SIVR
$4.15B
| $217K | ﹤0.01% |
+3,867
| New | +$269K |
|
|
XXI
4609
PUT
Twenty One Capital Inc
XXI
$2.26B
| $217K | ﹤0.01% |
43,900
-22,000
| -33% | -$154K |
|
4610
Progyny
PGNY
$1.9B
| $217K | ﹤0.01% |
7,536
+6,348
| +534% | +$142K |
|
4611
CALL
Sagimet Biosciences
SGMT
$580M
| $217K | ﹤0.01% |
28,100
-13,200
| -32% | -$89.8K |
|
|
NVMI
4612
CALL
Nova
NVMI
$12.2B
| $217K | ﹤0.01% |
400
-2,200
| -85% | -$1.13M |
|
4613
MYR Group
MYRG
$4.49B
| $217K | ﹤0.01% |
434
+341
| +367% | +$140K |
|
4614
Global X Artificial Intelligence & Technology ETF
AIQ
$10.3B
| $217K | ﹤0.01% |
3,309
+1,409
| +74% | +$84.1K |
|
|
RZLV
4615
PUT
Rezolve AI
RZLV
$884M
| $217K | ﹤0.01% |
68,800
-7,300
| -10% | -$19.2K |
|
|
WCN
4616
CALL
Waste Connections
WCN
$39.1B
| $217K | ﹤0.01% |
1,300
+1,200
| +1,200% | +$190K |
|
4617
PUT
MBIA
MBI
$219M
| $216K | ﹤0.01% |
33,200
+100
| +0.3% | +$603 |
|
4618
Verizon
VZ
$191B
| $216K | ﹤0.01% |
+5,112
| New | +$240K |
|
4619
FTAI Aviation
FTAI
$17.4B
| $216K | ﹤0.01% |
800
+457
| +133% | +$115K |
|
4620
PUT
Illinois Tool Works
ITW
$76.1B
| $216K | ﹤0.01% |
800
-6,600
| -89% | -$1.71M |
|
4621
CALL
ClearPoint Neuro
CLPT
$359M
| $216K | ﹤0.01% |
12,100
-1,500
| -11% | -$18.7K |
|
4622
CALL
Triple Flag Precious Metals
TFPM
$6.4B
| $216K | ﹤0.01% |
7,200
-57,300
| -89% | -$1.84M |
|
|
TMQ
4623
CALL
Trilogy Metals
TMQ
$555M
| $216K | ﹤0.01% |
61,400
-34,400
| -36% | -$142K |
|
4624
PUT
Loews
L
$21.7B
| $215K | ﹤0.01% |
1,900
+1,500
| +375% | +$163K |
|
4625
CALL
Bakkt Inc
BKKT
$365M
| $215K | ﹤0.01% |
27,500
+8,400
| +44% | +$75.2K |
|
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.