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 | |
|---|---|---|---|---|---|---|
1576
CALL
Silicon Laboratories
SLAB
$7.38B
| $3.17M | ﹤0.01% |
14,500
+11,500
| +383% | +$2.49M |
|
|
NUVL
1577
CALL
DELISTED
Nuvalent
NUVL
| $3.16M | ﹤0.01% |
25,600
+24,600
| +2,460% | +$2.65M |
|
1578
CALL
Global Payments
GPN
$22.9B
| $3.16M | ﹤0.01% |
43,500
-45,800
| -51% | -$3.15M |
|
1579
CALL
IDEX
IEX
$17B
| $3.15M | ﹤0.01% |
13,900
+11,700
| +532% | +$2.48M |
|
|
HIVE
1580
CALL
HIVE Digital Technologies
HIVE
$867M
| $3.15M | ﹤0.01% |
866,500
+357,000
| +70% | +$1.15M |
|
1581
CALL
Royalty Pharma
RPRX
$25.9B
| $3.14M | ﹤0.01% |
56,000
-20,600
| -27% | -$1.07M |
|
1582
CALL
DNOW Inc
DNOW
$2.88B
| $3.14M | ﹤0.01% |
241,900
+218,300
| +925% | +$2.83M |
|
1583
PUT
Oneok
OKE
$55.9B
| $3.13M | ﹤0.01% |
36,000
+2,400
| +7% | +$211K |
|
1584
PUT
Kinross Gold
KGC
$29.7B
| $3.13M | ﹤0.01% |
132,500
-162,800
| -55% | -$4.79M |
|
1585
PUT
Amprius Technologies
AMPX
$1.42B
| $3.12M | ﹤0.01% |
225,100
-137,000
| -38% | -$2.45M |
|
|
APGE
1586
PUT
DELISTED
Apogee Therapeutics
APGE
| $3.12M | ﹤0.01% |
23,500
-18,800
| -44% | -$1.69M |
|
1587
Sea Limited
SE
$61B
| $3.11M | ﹤0.01% |
32,476
+12,313
| +61% | +$1.08M |
|
1588
PUT
American Conservative Values ETF
ACVF
$154M
| $3.11M | ﹤0.01% |
238,300
+128,200
| +116% | +$6.7M |
|
1589
CALL
Matador Resources
MTDR
$6.38B
| $3.11M | ﹤0.01% |
62,400
-30,700
| -33% | -$1.75M |
|
|
VCX
1590
CALL
Fundrise Innovation Fund
VCX
$1.08B
| $3.1M | ﹤0.01% |
+35,900
| New | +$5.13M |
|
1591
PUT
Xcel Energy
XEL
$43.6B
| $3.1M | ﹤0.01% |
38,600
+28,000
| +264% | +$2.23M |
|
1592
PUT
MGM Resorts International
MGM
$8.2B
| $3.1M | ﹤0.01% |
64,800
+2,700
| +4% | +$112K |
|
1593
CALL
Clover Health Investments
CLOV
$2.38B
| $3.09M | ﹤0.01% |
590,300
-196,600
| -25% | -$668K |
|
1594
PUT
Skyworks Solutions
SWKS
$13.4B
| $3.09M | ﹤0.01% |
45,600
+11,800
| +35% | +$803K |
|
|
PPLC
1595
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $3.09M | ﹤0.01% |
57,400
+26,400
| +85% | +$1.42M |
|
1596
PUT
Lamb Weston
LW
$5.99B
| $3.09M | ﹤0.01% |
71,500
-15,800
| -18% | -$681K |
|
1597
CALL
Sensata Technologies
ST
$6.14B
| $3.08M | ﹤0.01% |
64,600
+16,500
| +34% | +$746K |
|
1598
PUT
Teladoc Health
TDOC
$1.11B
| $3.08M | ﹤0.01% |
363,500
-98,500
| -21% | -$655K |
|
1599
PUT
Equinor
EQNR
$100B
| $3.08M | ﹤0.01% |
98,000
-43,400
| -31% | -$1.62M |
|
1600
PUT
Citizens Financial Group
CFG
$27.6B
| $3.08M | ﹤0.01% |
43,900
+24,200
| +123% | +$1.56M |
|
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.