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 | |
|---|---|---|---|---|---|---|
2926
CALL
Richtech Robotics
RR
$367M
| $883K | ﹤0.01% |
418,600
-22,500
| -5% | -$54.6K |
|
2927
American Eagle Outfitters
AEO
$2.89B
| $883K | ﹤0.01% |
51,350
-13,637
| -21% | -$236K |
|
2928
Wingstop
WING
$2.74B
| $882K | ﹤0.01% |
5,089
+407
| +9% | +$64.1K |
|
2929
CALL
Abercrombie & Fitch
ANF
$5.72B
| $882K | ﹤0.01% |
9,800
-35,600
| -78% | -$3.02M |
|
2930
CALL
IES Holdings
IESC
$12.8B
| $882K | ﹤0.01% |
2,400
-200
| -8% | -$64.6K |
|
|
TGR
2931
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $881K | ﹤0.01% |
21,800
-10,200
| -32% | -$412K |
|
2932
PUT
Roper Technologies
ROP
$34.8B
| $880K | ﹤0.01% |
2,600
-13,400
| -84% | -$4.57M |
|
2933
PUT
Verisk Analytics
VRSK
$22B
| $880K | ﹤0.01% |
4,900
-16,600
| -77% | -$2.92M |
|
2934
CALL
Driven Brands
DRVN
$2.01B
| $878K | ﹤0.01% |
63,000
+36,000
| +133% | +$474K |
|
2935
CALL
OppFi
OPFI
$525M
| $877K | ﹤0.01% |
88,300
+22,700
| +35% | +$196K |
|
2936
PUT
Gold Fields
GFI
$31.5B
| $877K | ﹤0.01% |
26,100
+10,600
| +68% | +$441K |
|
|
FDXF
2937
PUT
FedEx Freight
FDXF
$16.8B
| $876K | ﹤0.01% |
+5,800
| New | +$950K |
|
2938
PUT
Kaspi.kz JSC
KSPI
$18.3B
| $875K | ﹤0.01% |
10,100
+1,200
| +13% | +$102K |
|
|
IVES
2939
CALL
Dan IVES Wedbush AI Revolution ETF
IVES
$1.08B
| $872K | ﹤0.01% |
22,900
+14,000
| +157% | +$493K |
|
2940
CALL
The Honest Company
HNST
$558M
| $870K | ﹤0.01% |
237,800
+37,000
| +18% | +$125K |
|
2941
PUT
Trimble
TRMB
$13.3B
| $870K | ﹤0.01% |
17,000
+14,300
| +530% | +$845K |
|
2942
Iridium Communications
IRDM
$5.1B
| $868K | ﹤0.01% |
15,833
+12,736
| +411% | +$544K |
|
2943
CALL
DHT Holdings
DHT
$3.56B
| $866K | ﹤0.01% |
52,400
-403,600
| -89% | -$7.21M |
|
2944
CALL
Clear Secure
YOU
$4.16B
| $864K | ﹤0.01% |
15,500
-37,100
| -71% | -$2.03M |
|
2945
CALL
Woodside Energy
WDS
$42.3B
| $864K | ﹤0.01% |
44,700
+30,200
| +208% | +$673K |
|
2946
CALL
JFrog
FROG
$10.5B
| $863K | ﹤0.01% |
9,500
-3,000
| -24% | -$195K |
|
2947
Targa Resources
TRGP
$59B
| $863K | ﹤0.01% |
3,218
+2,938
| +1,049% | +$755K |
|
2948
AmpliTech
AMPG
$95.8M
| $862K | ﹤0.01% |
+123,874
| New | +$519K |
|
2949
Arm
ARM
$299B
| $861K | ﹤0.01% |
2,428
-29,037
| -92% | -$7.72M |
|
2950
PUT
Churchill Downs
CHDN
$5.47B
| $861K | ﹤0.01% |
+9,600
| New | +$860K |
|
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.