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 | |
|---|---|---|---|---|---|---|
2226
CALL
Dutch Bros
BROS
$5.23B
| $1.67M | ﹤0.01% |
23,300
-96,100
| -80% | -$5.51M |
|
2227
CALL
Hormel Foods
HRL
$10.8B
| $1.67M | ﹤0.01% |
67,400
+38,400
| +132% | +$854K |
|
2228
CALL
American Superconductor
AMSC
$1.45B
| $1.67M | ﹤0.01% |
40,200
+10,900
| +37% | +$493K |
|
2229
CALL
Ramaco Resources Class A
METC
$574M
| $1.66M | ﹤0.01% |
125,700
+76,000
| +153% | +$1.11M |
|
2230
Peabody Energy
BTU
$3.1B
| $1.66M | ﹤0.01% |
71,912
-13,000
| -15% | -$346K |
|
2231
Invesco DB Base Metals Fund
DBB
$375M
| $1.66M | ﹤0.01% |
68,918
+57,676
| +513% | +$1.45M |
|
|
HNGE
2232
CALL
Hinge Health
HNGE
$7.71B
| $1.66M | ﹤0.01% |
20,000
+12,500
| +167% | +$679K |
|
2233
CALL
Lionsgate Studios
LION
$3.23B
| $1.66M | ﹤0.01% |
108,400
+56,700
| +110% | +$733K |
|
2234
CALL
Sempra
SRE
$51B
| $1.66M | ﹤0.01% |
17,900
-8,200
| -31% | -$763K |
|
2235
PUT
Insmed
INSM
$25.7B
| $1.65M | ﹤0.01% |
15,500
+11,800
| +319% | +$1.43M |
|
|
CIM
2236
CALL
Chimera Investment
CIM
$866M
| $1.65M | ﹤0.01% |
123,600
+72,500
| +142% | +$971K |
|
2237
Pinterest
PINS
$10.7B
| $1.65M | ﹤0.01% |
+78,385
| New | +$1.58M |
|
2238
CALL
Goodyear
GT
$1.48B
| $1.65M | ﹤0.01% |
249,700
+141,000
| +130% | +$907K |
|
2239
Teradyne
TER
$62.3B
| $1.65M | ﹤0.01% |
3,406
-3,166
| -48% | -$1.19M |
|
|
VSXY
2240
CALL
Victoria's Secret
VSXY
$6.61B
| $1.64M | ﹤0.01% |
19,700
-300
| -2% | -$18K |
|
2241
CALL
Alliance Resource Partners
ARLP
$3.24B
| $1.64M | ﹤0.01% |
68,200
+20,500
| +43% | +$521K |
|
2242
TG Therapeutics
TGTX
$8.79B
| $1.63M | ﹤0.01% |
29,758
+23,689
| +390% | +$969K |
|
2243
PUT
BrightSpring Health Services
BTSG
$11.2B
| $1.63M | ﹤0.01% |
23,400
-3,100
| -12% | -$172K |
|
2244
CALL
The RealReal
REAL
$1.07B
| $1.63M | ﹤0.01% |
138,300
-375,800
| -73% | -$4.01M |
|
2245
PUT
Ally Financial
ALLY
$11.8B
| $1.63M | ﹤0.01% |
35,400
-85,900
| -71% | -$3.73M |
|
|
TTAN
2246
CALL
ServiceTitan Inc
TTAN
$5.6B
| $1.63M | ﹤0.01% |
23,000
+1,100
| +5% | +$70.8K |
|
2247
Hims & Hers Health
HIMS
$6.86B
| $1.62M | ﹤0.01% |
+46,856
| New | +$1.26M |
|
2248
Colgate-Palmolive
CL
$68.6B
| $1.62M | ﹤0.01% |
+17,719
| New | +$1.55M |
|
2249
PUT
Sprouts Farmers Market
SFM
$5.83B
| $1.62M | ﹤0.01% |
19,200
+1,100
| +6% | +$88.9K |
|
2250
Grocery Outlet
GO
$1.1B
| $1.62M | ﹤0.01% |
+162,451
| New | +$1.34M |
|
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.