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 | |
|---|---|---|---|---|---|---|
4001
PUT
PACCAR
PCAR
$58.8B
| $360K | ﹤0.01% |
3,000
+1,500
| +100% | +$177K |
|
4002
CALL
Cannae Holdings
CNNE
$676M
| $360K | ﹤0.01% |
25,000
| – | – |
|
4003
Boston Scientific
BSX
$63.9B
| $359K | ﹤0.01% |
+8,423
| New | +$457K |
|
|
4004
PACCAR
PCAR
$58.8B
| $359K | ﹤0.01% |
2,992
+1,544
| +107% | +$182K |
|
4005
PUT
Asana
ASAN
$1.98B
| $359K | ﹤0.01% |
51,300
+25,400
| +98% | +$171K |
|
4006
CALL
Expeditors International
EXPD
$24.5B
| $359K | ﹤0.01% |
2,200
-35,400
| -94% | -$5.47M |
|
4007
PUT
Rezolute
RZLT
$404M
| $358K | ﹤0.01% |
68,900
-7,800
| -10% | -$29K |
|
|
NXH
4008
CALL
Neighborhood Intelligence Inc
NXH
$295M
| $358K | ﹤0.01% |
65,200
+46,200
| +243% | +$253K |
|
4009
PUT
Booz Allen Hamilton
BAH
$8.45B
| $358K | ﹤0.01% |
5,900
-3,800
| -39% | -$290K |
|
4010
PUT
BJs Wholesale Club
BJ
$12.2B
| $358K | ﹤0.01% |
4,100
-3,600
| -47% | -$330K |
|
|
TEN
4011
CALL
Tsakos Energy Navigation Ltd
TEN
$1.4B
| $357K | ﹤0.01% |
10,100
-38,100
| -79% | -$1.52M |
|
|
VIVO
4012
VivoPower PLC
VIVO
$126M
| $356K | ﹤0.01% |
68,926
+64,763
| +1,556% | +$267K |
|
4013
CALL
Valvoline
VVV
$3.63B
| $356K | ﹤0.01% |
9,000
+1,800
| +25% | +$62.6K |
|
4014
Cracker Barrel
CBRL
$1.2B
| $356K | ﹤0.01% |
6,674
+2,491
| +60% | +$86.3K |
|
|
XRPC
4015
CALL
Canary XRP ETF
XRPC
$343M
| $356K | ﹤0.01% |
32,100
+32,000
| +32,000% | +$444K |
|
4016
CALL
Columbus McKinnon
CMCO
$473M
| $356K | ﹤0.01% |
23,500
+23,400
| +23,400% | +$348K |
|
4017
CALL
Itaú Unibanco
ITUB
$88.1B
| $355K | ﹤0.01% |
43,500
+33,600
| +339% | +$278K |
|
4018
CALL
MBIA
MBI
$220M
| $355K | ﹤0.01% |
54,500
+32,000
| +142% | +$193K |
|
4019
ClearPoint Neuro
CLPT
$467M
| $355K | ﹤0.01% |
19,910
+11,528
| +138% | +$144K |
|
4020
United Natural Foods
UNFI
$2.76B
| $355K | ﹤0.01% |
7,777
-2,288
| -23% | -$113K |
|
|
4021
PUT
ClearPoint Neuro
CLPT
$467M
| $355K | ﹤0.01% |
19,900
+13,300
| +202% | +$166K |
|
4022
PUT
B&G Foods
BGS
$249M
| $354K | ﹤0.01% |
89,000
-4,900
| -5% | -$22.7K |
|
4023
PUT
Capital Southwest
CSWC
$1.47B
| $354K | ﹤0.01% |
14,900
+3,400
| +30% | +$79.5K |
|
|
AVEX
4024
AEVEX Corp
AVEX
$1.06B
| $354K | ﹤0.01% |
+16,950
| New | +$440K |
|
4025
PUT
Boston Beer
SAM
$1.7B
| $354K | ﹤0.01% |
2,000
-1,300
| -39% | -$264K |
|
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.