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 | |
|---|---|---|---|---|---|---|
1351
Elbit Systems
ESLT
$34.4B
| $4.08M | ﹤0.01% |
5,383
-5,659
| -51% | -$4.71M |
|
1352
CALL
Hubbell
HUBB
$24.7B
| $4.08M | ﹤0.01% |
+7,800
| New | +$3.94M |
|
|
SEI
1353
CALL
Solaris Energy Infrastructure
SEI
$4.67B
| $4.07M | ﹤0.01% |
50,600
+26,300
| +108% | +$1.88M |
|
1354
PUT
Lightpath Technologies
LPTH
$699M
| $4.07M | ﹤0.01% |
249,000
-287,600
| -54% | -$4.01M |
|
1355
CALL
AngloGold Ashanti
AU
$50.1B
| $4.04M | ﹤0.01% |
50,000
+21,100
| +73% | +$2M |
|
|
USAR
1356
USA Rare Earth Inc
USAR
$5.7B
| $4.04M | ﹤0.01% |
187,412
+179,190
| +2,179% | +$4.09M |
|
1357
PUT
Colgate-Palmolive
CL
$68.6B
| $4.04M | ﹤0.01% |
44,100
-61,000
| -58% | -$5.34M |
|
1358
CALL
MACOM Technology Solutions
MTSI
$21.8B
| $4.03M | ﹤0.01% |
10,600
+9,000
| +563% | +$2.99M |
|
1359
CALL
monday.com
MNDY
$3.54B
| $4.02M | ﹤0.01% |
55,600
-10,900
| -16% | -$799K |
|
1360
CALL
ProShares Ether Strategy ETF
EETH
$73.5M
| $4.02M | ﹤0.01% |
190,700
+83,900
| +79% | +$2.12M |
|
1361
CALL
Deutsche Bank
DB
$68.7B
| $4.02M | ﹤0.01% |
119,000
-31,500
| -21% | -$1.02M |
|
1362
PUT
Frontline
FRO
$10.6B
| $4.01M | ﹤0.01% |
115,400
+36,100
| +46% | +$1.33M |
|
1363
CALL
Royal Gold
RGLD
$21.4B
| $4.01M | ﹤0.01% |
20,100
+4,400
| +28% | +$1.02M |
|
1364
CALL
Automatic Data Processing
ADP
$105B
| $4.01M | ﹤0.01% |
17,900
-2,200
| -11% | -$470K |
|
1365
CALL
Carrier Global
CARR
$46.5B
| $4M | ﹤0.01% |
54,500
-4,600
| -8% | -$301K |
|
1366
PUT
Allstate
ALL
$57.6B
| $4M | ﹤0.01% |
16,800
+7,000
| +71% | +$1.52M |
|
1367
CALL
Kohl's
KSS
$2.03B
| $4M | ﹤0.01% |
225,500
-24,200
| -10% | -$359K |
|
1368
PUT
Coeur Mining
CDE
$19.8B
| $3.99M | ﹤0.01% |
244,600
-126,100
| -34% | -$2.3M |
|
1369
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.18B
| $3.99M | ﹤0.01% |
27,800
-30,900
| -53% | -$838K |
|
1370
PUT
ProShares Ultra S&P500
SSO
$9.03B
| $3.97M | ﹤0.01% |
102,600
+21,100
| +26% | +$1.35M |
|
1371
CALL
Oshkosh
OSK
$8.2B
| $3.96M | ﹤0.01% |
25,800
+9,600
| +59% | +$1.35M |
|
1372
Natera
NTRA
$59.5B
| $3.94M | ﹤0.01% |
14,519
+12,635
| +671% | +$2.69M |
|
1373
CALL
DexCom
DXCM
$32.7B
| $3.93M | ﹤0.01% |
58,400
+7,100
| +14% | +$473K |
|
1374
CALL
Clorox
CLX
$10.1B
| $3.93M | ﹤0.01% |
41,200
+23,500
| +133% | +$2.26M |
|
1375
The Mosaic Company
MOS
$7.31B
| $3.92M | ﹤0.01% |
185,130
+3,319
| +2% | +$76.7K |
|
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.