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 | |
|---|---|---|---|---|---|---|
1501
PUT
Air Products & Chemicals
APD
$62.7B
| $3.46M | ﹤0.01% |
11,800
+8,900
| +307% | +$2.59M |
|
|
ARI
1502
PUT
Apollo Commercial Real Estate
ARI
$802M
| $3.44M | ﹤0.01% |
322,100
-4,300
| -1% | -$46.8K |
|
1503
PUT
Xylem
XYL
$24B
| $3.44M | ﹤0.01% |
29,100
+9,600
| +49% | +$1.11M |
|
1504
Carrier Global
CARR
$46.5B
| $3.44M | ﹤0.01% |
+46,850
| New | +$3.06M |
|
1505
Kroger
KR
$34.7B
| $3.44M | ﹤0.01% |
+61,872
| New | +$4.04M |
|
1506
PUT
Power Integrations
POWI
$2.92B
| $3.43M | ﹤0.01% |
40,900
+39,300
| +2,456% | +$2.84M |
|
1507
PUT
American Eagle Outfitters
AEO
$2.78B
| $3.42M | ﹤0.01% |
199,000
+27,500
| +16% | +$476K |
|
1508
CALL
Flutter Entertainment
FLUT
$14.4B
| $3.42M | ﹤0.01% |
33,500
+13,300
| +66% | +$1.37M |
|
1509
PUT
International Flavors & Fragrances
IFF
$21.9B
| $3.42M | ﹤0.01% |
43,200
-4,900
| -10% | -$365K |
|
1510
PUT
Hallador Energy
HNRG
$694M
| $3.42M | ﹤0.01% |
196,700
+72,300
| +58% | +$1.24M |
|
1511
iShares MSCI USA Momentum Factor ETF
MTUM
$25.5B
| $3.42M | ﹤0.01% |
+9,968
| New | +$2.97M |
|
1512
CALL
TG Therapeutics
TGTX
$8.79B
| $3.42M | ﹤0.01% |
62,200
-62,400
| -50% | -$2.55M |
|
1513
CALL
BioNTech
BNTX
$24.7B
| $3.41M | ﹤0.01% |
36,700
+20,700
| +129% | +$1.95M |
|
1514
PUT
Roivant Sciences
ROIV
$25.9B
| $3.41M | ﹤0.01% |
96,400
+23,400
| +32% | +$691K |
|
1515
PUT
Boston Properties
BXP
$10.1B
| $3.41M | ﹤0.01% |
51,400
+16,400
| +47% | +$982K |
|
1516
PUT
Exelon
EXC
$41.6B
| $3.41M | ﹤0.01% |
73,100
+57,100
| +357% | +$2.64M |
|
1517
PUT
Cooper Companies
COO
$10.5B
| $3.41M | ﹤0.01% |
47,500
+39,900
| +525% | +$2.61M |
|
1518
CALL
Replimune Group
REPL
$1.16B
| $3.41M | ﹤0.01% |
307,600
+281,600
| +1,083% | +$1.72M |
|
1519
PUT
FuelCell Energy
FCEL
$1.32B
| $3.4M | ﹤0.01% |
94,500
+75,800
| +405% | +$1.23M |
|
1520
Johnson & Johnson
JNJ
$654B
| $3.4M | ﹤0.01% |
+13,397
| New | +$3.12M |
|
1521
CALL
UBS Group
UBS
$152B
| $3.4M | ﹤0.01% |
68,600
-198,400
| -74% | -$9.04M |
|
1522
Global X Copper Miners ETF NEW
COPX
$7.47B
| $3.4M | ﹤0.01% |
44,124
-30,384
| -41% | -$2.53M |
|
1523
Hubbell
HUBB
$24.7B
| $3.4M | ﹤0.01% |
6,490
+6,228
| +2,377% | +$3.15M |
|
1524
PUT
Biogen
BIIB
$33.6B
| $3.39M | ﹤0.01% |
15,700
-19,200
| -55% | -$3.67M |
|
1525
PUT
Sharplink Inc
SBET
$2.09B
| $3.39M | ﹤0.01% |
705,800
-238,000
| -25% | -$1.52M |
|
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.