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 | |
|---|---|---|---|---|---|---|
1426
CALL
Golar LNG
GLNG
$5.07B
| $3.71M | ﹤0.01% |
74,500
-35,800
| -32% | -$1.89M |
|
1427
PUT
FirstEnergy
FE
$25.1B
| $3.71M | ﹤0.01% |
78,100
+23,100
| +42% | +$1.1M |
|
1428
CALL
GDS Holdings
GDS
$6.57B
| $3.71M | ﹤0.01% |
123,600
-17,700
| -13% | -$683K |
|
1429
Powell Industries
POWL
$6.91B
| $3.71M | ﹤0.01% |
+12,961
| New | +$3.52M |
|
1430
BlackBerry
BB
$4.82B
| $3.7M | ﹤0.01% |
292,877
+98,113
| +50% | +$685K |
|
1431
PUT
Groupon
GRPN
$866M
| $3.7M | ﹤0.01% |
153,900
+143,500
| +1,380% | +$2.37M |
|
|
HNGE
1432
PUT
Hinge Health
HNGE
$7.71B
| $3.7M | ﹤0.01% |
44,600
+15,300
| +52% | +$831K |
|
1433
CALL
Madison Square Garden
MSGS
$9.7B
| $3.7M | ﹤0.01% |
9,200
+8,400
| +1,050% | +$2.97M |
|
1434
PUT
Plains All American Pipeline
PAA
$17.2B
| $3.69M | ﹤0.01% |
165,900
-52,400
| -24% | -$1.16M |
|
1435
CALL
Sherwin-Williams
SHW
$79.9B
| $3.68M | ﹤0.01% |
10,700
+6,000
| +128% | +$1.92M |
|
1436
CALL
Banco Macro
BMA
$4.4B
| $3.68M | ﹤0.01% |
39,700
+27,900
| +236% | +$2.29M |
|
1437
CALL
Best Buy
BBY
$19B
| $3.67M | ﹤0.01% |
48,300
-13,000
| -21% | -$864K |
|
1438
XPeng
XPEV
$9.69B
| $3.66M | ﹤0.01% |
276,390
+12,824
| +5% | +$203K |
|
1439
CALL
LyondellBasell Industries
LYB
$18.8B
| $3.66M | ﹤0.01% |
69,500
-58,900
| -46% | -$4.06M |
|
1440
Alaska Air
ALK
$4.57B
| $3.65M | ﹤0.01% |
69,891
+69,302
| +11,766% | +$2.96M |
|
1441
CALL
Targa Resources
TRGP
$59.6B
| $3.65M | ﹤0.01% |
13,600
+2,600
| +24% | +$668K |
|
1442
CALL
nVent Electric
NVT
$26.6B
| $3.65M | ﹤0.01% |
21,500
-19,900
| -48% | -$3.1M |
|
1443
CALL
Beazer Homes USA
BZH
$890M
| $3.64M | ﹤0.01% |
129,700
+1,700
| +1% | +$40.2K |
|
1444
Kimberly-Clark
KMB
$32.7B
| $3.63M | ﹤0.01% |
33,108
-1,840
| -5% | -$182K |
|
1445
CALL
Agilon Health
AGL
$1.36B
| $3.63M | ﹤0.01% |
33,900
+1,400
| +4% | +$91.7K |
|
1446
PUT
Dover
DOV
$25.8B
| $3.63M | ﹤0.01% |
+16,200
| New | +$3.53M |
|
1447
Invesco DB Agriculture Fund
DBA
$1.23B
| $3.63M | ﹤0.01% |
136,182
-2,181
| -2% | -$59.5K |
|
1448
CALL
Procore
PCOR
$7.49B
| $3.63M | ﹤0.01% |
89,300
+5,600
| +7% | +$277K |
|
1449
PUT
Canadian Imperial Bank of Commerce
CM
$103B
| $3.62M | ﹤0.01% |
31,500
+8,100
| +35% | +$888K |
|
1450
CALL
Energy Vault
NRGV
$800M
| $3.62M | ﹤0.01% |
768,300
+253,100
| +49% | +$1.13M |
|
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.