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 | |
|---|---|---|---|---|---|---|
2351
Cognizant
CTSH
$25.8B
| $1.46M | ﹤0.01% |
+37,722
| New | +$1.99M |
|
2352
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.35B
| $1.46M | ﹤0.01% |
+21,269
| New | +$1.42M |
|
2353
PUT
Idaho Strategic Resources
IDR
$481M
| $1.46M | ﹤0.01% |
44,600
+43,700
| +4,856% | +$1.7M |
|
2354
CALL
Amer Sports
AS
$16.2B
| $1.46M | ﹤0.01% |
43,100
-12,300
| -22% | -$431K |
|
2355
Lithia Motors
LAD
$6.96B
| $1.46M | ﹤0.01% |
5,014
-1,956
| -28% | -$556K |
|
2356
PUT
2x Long VIX Futures ETF
UVIX
$164M
| $1.46M | ﹤0.01% |
6,425
-3,285
| -34% | -$326K |
|
2357
CALL
Open Text
OTEX
$5.45B
| $1.46M | ﹤0.01% |
65,700
+65,000
| +9,286% | +$1.47M |
|
|
NUAI
2358
New Era Energy & Digital Inc
NUAI
$853M
| $1.45M | ﹤0.01% |
227,942
-162,944
| -42% | -$791K |
|
2359
PUT
Brookfield
BN
$82.3B
| $1.45M | ﹤0.01% |
34,100
+22,500
| +194% | +$1.01M |
|
2360
CALL
Ametek
AME
$57.5B
| $1.45M | ﹤0.01% |
6,000
-5,800
| -49% | -$1.34M |
|
2361
CALL
Asbury Automotive
ABG
$3.32B
| $1.45M | ﹤0.01% |
+7,200
| New | +$1.42M |
|
2362
PUT
Mid-America Apartment Communities
MAA
$13.7B
| $1.44M | ﹤0.01% |
10,400
+2,600
| +33% | +$339K |
|
2363
PUT
Celcuity
CELC
$3.89B
| $1.44M | ﹤0.01% |
13,800
+5,500
| +66% | +$635K |
|
2364
PUT
Jackson Financial
JXN
$9.02B
| $1.44M | ﹤0.01% |
14,100
-7,100
| -33% | -$769K |
|
2365
PUT
Yum China
YUMC
$13.7B
| $1.44M | ﹤0.01% |
35,300
+10,900
| +45% | +$499K |
|
2366
CALL
ResMed
RMD
$32B
| $1.44M | ﹤0.01% |
7,400
+3,100
| +72% | +$643K |
|
|
SPYQ
2367
CALL
Tradr 2X Long SPY Quarterly ETF
SPYQ
$12.2M
| $1.44M | ﹤0.01% |
37,100
-1,400
| -4% | -$248K |
|
|
2368
Amer Sports
AS
$16.2B
| $1.44M | ﹤0.01% |
42,531
-8,954
| -17% | -$314K |
|
2369
CALL
Forward Air
FWRD
$496M
| $1.44M | ﹤0.01% |
106,500
+39,300
| +58% | +$585K |
|
2370
PUT
United States Natural Gas Fund
UNG
$639M
| $1.44M | ﹤0.01% |
122,700
-217,800
| -64% | -$2.44M |
|
2371
SiriusXM
SIRI
$8.72B
| $1.44M | ﹤0.01% |
48,663
+12,347
| +34% | +$332K |
|
|
DXYZ
2372
CALL
Destiny Tech100
DXYZ
$933M
| $1.44M | ﹤0.01% |
+55,800
| New | +$2.1M |
|
2373
CALL
PennyMac Financial
PFSI
$3.4B
| $1.44M | ﹤0.01% |
16,500
+7,600
| +85% | +$661K |
|
2374
CALL
WEC Energy
WEC
$33.1B
| $1.44M | ﹤0.01% |
12,300
+6,800
| +124% | +$776K |
|
2375
CALL
Trex
TREX
$4.56B
| $1.44M | ﹤0.01% |
28,700
+14,500
| +102% | +$601K |
|
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.