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 | |
|---|---|---|---|---|---|---|
|
GAP
2001
CALL
The Gap Inc
GAP
$7.66B
| $2.09M | ﹤0.01% |
112,100
-42,200
| -27% | -$973K |
|
2002
CALL
Veralto
VLTO
$23.7B
| $2.09M | ﹤0.01% |
23,600
+22,000
| +1,375% | +$1.91M |
|
2003
PUT
Targa Resources
TRGP
$59.6B
| $2.09M | ﹤0.01% |
7,800
+5,000
| +179% | +$1.28M |
|
2004
PUT
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$181M
| $2.09M | ﹤0.01% |
20,800
+11,100
| +114% | +$293K |
|
2005
CALL
Icon
ICLR
$13.3B
| $2.08M | ﹤0.01% |
12,000
+10,300
| +606% | +$1.31M |
|
|
VZLA
2006
CALL
Vizsla Silver
VZLA
$1.4B
| $2.08M | ﹤0.01% |
630,900
-332,500
| -35% | -$1.16M |
|
2007
CALL
Ascendis Pharma A/S
ASND
$14.8B
| $2.08M | ﹤0.01% |
7,800
-22,000
| -74% | -$5.14M |
|
2008
CALL
Fabrinet
FN
$15B
| $2.08M | ﹤0.01% |
3,700
-200
| -5% | -$129K |
|
2009
CALL
Chemours
CC
$2.18B
| $2.08M | ﹤0.01% |
101,200
+34,800
| +52% | +$797K |
|
2010
PUT
Archer Aviation
ACHR
$4.32B
| $2.08M | ﹤0.01% |
438,700
-223,000
| -34% | -$1.3M |
|
2011
CALL
TKO Group
TKO
$13.4B
| $2.07M | ﹤0.01% |
10,300
+5,900
| +134% | +$1.15M |
|
2012
iShares TIPS Bond ETF
TIP
$14.5B
| $2.07M | ﹤0.01% |
18,937
+8,351
| +79% | +$923K |
|
2013
PUT
Wendy's
WEN
$1.25B
| $2.07M | ﹤0.01% |
249,500
-658,800
| -73% | -$4.71M |
|
2014
CALL
Republic Services
RSG
$64.9B
| $2.07M | ﹤0.01% |
9,700
-6,400
| -40% | -$1.34M |
|
|
IMSR
2015
CALL
Terrestrial Energy
IMSR
$456M
| $2.07M | ﹤0.01% |
291,800
+87,000
| +42% | +$643K |
|
2016
PUT
Celanese
CE
$5.17B
| $2.07M | ﹤0.01% |
44,900
-4,400
| -9% | -$255K |
|
2017
CALL
Western Union
WU
$1.93B
| $2.06M | ﹤0.01% |
267,700
+215,300
| +411% | +$1.81M |
|
2018
CALL
SEI Investments
SEIC
$12.7B
| $2.06M | ﹤0.01% |
23,500
+22,000
| +1,467% | +$1.92M |
|
2019
PUT
Synchrony
SYF
$23.7B
| $2.06M | ﹤0.01% |
27,100
-24,500
| -47% | -$1.8M |
|
2020
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$880M
| $2.06M | ﹤0.01% |
33,500
-32,300
| -49% | -$1.56M |
|
2021
PUT
Texas Pacific Land
TPL
$23.5B
| $2.06M | ﹤0.01% |
4,700
-7,300
| -61% | -$2.96M |
|
2022
Cboe Global Markets
CBOE
$26.9B
| $2.05M | ﹤0.01% |
8,462
+7,255
| +601% | +$2.22M |
|
2023
PUT
Elastic
ESTC
$9.25B
| $2.05M | ﹤0.01% |
36,000
+27,200
| +309% | +$1.46M |
|
|
CALY
2024
CALL
Callaway Golf Company
CALY
$2.58B
| $2.05M | ﹤0.01% |
109,200
+56,300
| +106% | +$883K |
|
2025
Manulife Financial
MFC
$72.7B
| $2.05M | ﹤0.01% |
+50,640
| New | +$1.96M |
|
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.