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 | |
|---|---|---|---|---|---|---|
4326
PUT
Leonardo DRS
DRS
$9.78B
| $273K | ﹤0.01% |
6,400
+5,600
| +700% | +$249K |
|
4327
CALL
EPR Properties
EPR
$4.38B
| $273K | ﹤0.01% |
4,700
+3,500
| +292% | +$199K |
|
4328
CALL
Angi Inc
ANGI
$230M
| $273K | ﹤0.01% |
45,800
+36,000
| +367% | +$222K |
|
|
FJET
4329
CALL
Starfighters Space Inc
FJET
$101M
| $272K | ﹤0.01% |
51,200
+2,200
| +4% | +$13.2K |
|
4330
CALL
Verastem
VSTM
$705M
| $272K | ﹤0.01% |
71,300
-18,600
| -21% | -$90K |
|
|
ADAM
4331
CALL
Adamas Trust
ADAM
$713M
| $272K | ﹤0.01% |
29,000
+28,900
| +28,900% | +$249K |
|
4332
PUT
Ginkgo Bioworks
DNA
$762M
| $272K | ﹤0.01% |
27,400
+15,900
| +138% | +$133K |
|
4333
CALL
Highwoods Properties
HIW
$3.2B
| $271K | ﹤0.01% |
9,000
+8,800
| +4,400% | +$228K |
|
4334
United States Gasoline Fund
UGA
$184M
| $271K | ﹤0.01% |
2,636
-5,153
| -66% | -$558K |
|
|
HUCK
4335
PUT
Huckleberry.ai, Inc. Class B Common Stock
HUCK
$156M
| $271K | ﹤0.01% |
86,700
+76,900
| +785% | +$257K |
|
4336
Douglas Emmett
DEI
$1.61B
| $271K | ﹤0.01% |
+22,961
| New | +$258K |
|
4337
PUT
Personalis
PSNL
$1.73B
| $271K | ﹤0.01% |
20,200
+18,500
| +1,088% | +$151K |
|
|
MOMO
4338
PUT
Hello Group
MOMO
$691M
| $270K | ﹤0.01% |
46,600
+14,900
| +47% | +$88.9K |
|
|
CMPS
4339
PUT
Compass Pathways
CMPS
$1.8B
| $270K | ﹤0.01% |
19,100
-306,000
| -94% | -$3.11M |
|
4340
Verra Mobility
VRRM
$450M
| $270K | ﹤0.01% |
+63,534
| New | +$671K |
|
4341
CALL
J.M. Smucker
SJM
$12.7B
| $270K | ﹤0.01% |
2,400
-12,000
| -83% | -$1.22M |
|
4342
Roundhill Generative AI & Technology ETF
CHAT
$1.91B
| $270K | ﹤0.01% |
2,736
-576
| -17% | -$49.3K |
|
4343
CALL
United Natural Foods
UNFI
$2.75B
| $269K | ﹤0.01% |
5,900
-3,200
| -35% | -$159K |
|
4344
CALL
Q2 Holdings
QTWO
$3.4B
| $269K | ﹤0.01% |
5,600
+700
| +14% | +$33.2K |
|
4345
CALL
Taysha Gene Therapies
TSHA
$1.58B
| $269K | ﹤0.01% |
39,500
+13,500
| +52% | +$79.9K |
|
4346
Ambarella
AMBA
$3.03B
| $269K | ﹤0.01% |
3,130
-113
| -3% | -$7.78K |
|
4347
PUT
ARK 21Shares Bitcoin ETF
ARKB
$3.17B
| $269K | ﹤0.01% |
13,800
+6,800
| +97% | +$162K |
|
4348
PUT
Talos Energy
TALO
$2.73B
| $269K | ﹤0.01% |
20,800
+20,200
| +3,367% | +$301K |
|
4349
PUT
Strategic Education
STRA
$1.68B
| $268K | ﹤0.01% |
+3,500
| New | +$277K |
|
|
EFOR
4350
CALL
Everforth Inc
EFOR
$1.34B
| $268K | ﹤0.01% |
15,000
+14,800
| +7,400% | +$362K |
|
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.