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 | |
|---|---|---|---|---|---|---|
3676
CALL
Ivanhoe Electric
IE
$1.7B
| $469K | ﹤0.01% |
48,800
+14,400
| +42% | +$182K |
|
3677
CALL
Weibo
WB
$1.59B
| $468K | ﹤0.01% |
64,500
-8,800
| -12% | -$71.8K |
|
3678
CALL
NN Inc
NNBR
$307M
| $468K | ﹤0.01% |
130,400
+125,800
| +2,735% | +$313K |
|
|
SVIA
3679
Silvia, Inc. Common Stock
SVIA
$345M
| $467K | ﹤0.01% |
303,406
+301,218
| +13,767% | +$552K |
|
|
CNH
3680
PUT
CNH Industrial
CNH
$21.3B
| $467K | ﹤0.01% |
41,600
+39,000
| +1,500% | +$415K |
|
3681
CALL
Champion Homes
SKY
$4.71B
| $467K | ﹤0.01% |
+5,300
| New | +$406K |
|
3682
PUT
Lantheus
LNTH
$6.51B
| $466K | ﹤0.01% |
4,200
+2,200
| +110% | +$205K |
|
3683
Cenovus Energy
CVE
$57.4B
| $466K | ﹤0.01% |
18,777
+6,251
| +50% | +$173K |
|
3684
Enlight Renewable Energy
ENLT
$9.62B
| $466K | ﹤0.01% |
5,233
+4,632
| +771% | +$408K |
|
3685
CALL
CPS Technologies
CPSH
$71.5M
| $465K | ﹤0.01% |
84,300
+11,900
| +16% | +$69.8K |
|
|
AVNS
3686
CALL
DELISTED
Avanos Medical
AVNS
| $465K | ﹤0.01% |
18,700
+18,000
| +2,571% | +$421K |
|
3687
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.17B
| $465K | ﹤0.01% |
6,600
+5,000
| +313% | +$314K |
|
3688
CALL
Lithia Motors
LAD
$6.66B
| $465K | ﹤0.01% |
1,600
+1,300
| +433% | +$369K |
|
3689
PUT
W.P. Carey
WPC
$15B
| $465K | ﹤0.01% |
6,500
-100
| -2% | -$7.33K |
|
3690
CALL
Kayne Anderson Energy Infrastructure Fund
KYN
$2.33B
| $465K | ﹤0.01% |
33,600
-9,500
| -22% | -$132K |
|
3691
Williams-Sonoma
WSM
$27.2B
| $464K | ﹤0.01% |
+1,991
| New | +$395K |
|
|
HTFL
3692
CALL
Heartflow Inc
HTFL
$4.34B
| $464K | ﹤0.01% |
+15,800
| New | +$475K |
|
3693
PUT
Fresenius Medical Care
FMS
$12.2B
| $464K | ﹤0.01% |
20,500
-29,500
| -59% | -$662K |
|
3694
CALL
Adaptive Biotechnologies
ADPT
$4.55B
| $463K | ﹤0.01% |
21,600
+20,700
| +2,300% | +$317K |
|
|
LAC
3695
PUT
Lithium Americas
LAC
$973M
| $463K | ﹤0.01% |
120,300
+400
| +0.3% | +$1.91K |
|
|
EU
3696
CALL
enCore Energy
EU
$233M
| $462K | ﹤0.01% |
352,900
-396,700
| -53% | -$667K |
|
3697
Amplify Cybersecurity ETF
HACK
$3.24B
| $462K | ﹤0.01% |
4,404
+4,201
| +2,069% | +$370K |
|
3698
Liberty Global Class A
LBTYA
$3.22B
| $462K | ﹤0.01% |
40,617
-11,668
| -22% | -$139K |
|
3699
Motorola Solutions
MSI
$74.8B
| $462K | ﹤0.01% |
+1,112
| New | +$465K |
|
3700
PUT
Jack in the Box
JACK
$263M
| $462K | ﹤0.01% |
29,200
+28,800
| +7,200% | +$355K |
|
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.