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 | |
|---|---|---|---|---|---|---|
776
CALL
Semtech
SMTC
$17B
| $9.61M | 0.01% |
59,400
+52,500
| +761% | +$6.86M |
|
777
PUT
TJX Companies
TJX
$143B
| $9.51M | 0.01% |
62,800
-22,000
| -26% | -$3.48M |
|
778
CALL
Hershey
HSY
$33.4B
| $9.51M | 0.01% |
54,200
+23,200
| +75% | +$4.37M |
|
779
CALL
VeriSign
VRSN
$26B
| $9.51M | 0.01% |
37,800
+33,600
| +800% | +$9.34M |
|
780
CALL
Logitech
LOGI
$14.5B
| $9.5M | 0.01% |
101,000
+45,300
| +81% | +$4.7M |
|
781
PUT
Zoom
ZM
$26.2B
| $9.49M | 0.01% |
110,000
+38,400
| +54% | +$3.63M |
|
782
CALL
ImmunityBio
IBRX
$8.95B
| $9.48M | 0.01% |
1,082,700
-232,600
| -18% | -$1.76M |
|
783
PUT
Ferrari
RACE
$72.2B
| $9.46M | 0.01% |
25,400
+300
| +1% | +$104K |
|
|
BMNR
784
PUT
BitMine Immersion Technologies
BMNR
$16.6B
| $9.45M | 0.01% |
709,700
-417,800
| -37% | -$8.08M |
|
785
CALL
Canadian Imperial Bank of Commerce
CM
$103B
| $9.42M | 0.01% |
81,900
+55,400
| +209% | +$6.08M |
|
786
Dow Inc
DOW
$20.2B
| $9.39M | 0.01% |
343,384
-115,873
| -25% | -$4.21M |
|
787
CALL
Dollar Tree
DLTR
$21.4B
| $9.39M | 0.01% |
77,600
+7,600
| +11% | +$790K |
|
788
CALL
AB InBev
BUD
$154B
| $9.34M | 0.01% |
113,400
+17,400
| +18% | +$1.37M |
|
789
CALL
GlobalFoundries
GFS
$27.3B
| $9.31M | 0.01% |
113,000
-10,600
| -9% | -$741K |
|
790
PUT
Under Armour Class C
UA
$1.88B
| $9.31M | 0.01% |
1,456,800
-126,200
| -8% | -$727K |
|
791
PUT
Cadence Design Systems
CDNS
$89.8B
| $9.31M | 0.01% |
24,800
+12,800
| +107% | +$4.49M |
|
792
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.72B
| $9.3M | 0.01% |
74,900
+62,800
| +519% | +$24.4M |
|
793
CALL
EOG Resources
EOG
$73.6B
| $9.29M | 0.01% |
71,600
-19,900
| -22% | -$2.71M |
|
794
Oscar Health
OSCR
$9.14B
| $9.28M | 0.01% |
325,509
-239,737
| -42% | -$5.16M |
|
795
Invesco QQQ Trust
QQQ
$502B
| $9.28M | 0.01% |
12,600
-3,696
| -23% | -$2.54M |
|
796
PUT
Dick's Sporting Goods
DKS
$13.4B
| $9.28M | 0.01% |
40,900
-19,900
| -33% | -$4.4M |
|
797
PUT
Etsy
ETSY
$6.28B
| $9.27M | 0.01% |
123,100
+17,900
| +17% | +$1.15M |
|
|
QLTB
798
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $9.27M | 0.01% |
28,100
+15,500
| +123% | +$5.11M |
|
799
CALL
Trump Media & Technology Group
DJT
$2.54B
| $9.24M | 0.01% |
1,193,500
+696,200
| +140% | +$6.12M |
|
800
PUT
JFrog
FROG
$11B
| $9.22M | 0.01% |
101,500
+21,100
| +26% | +$1.37M |
|
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.