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 | |
|---|---|---|---|---|---|---|
3626
CALL
NCR Voyix
VYX
$943M
| $490K | ﹤0.01% |
60,000
+36,800
| +159% | +$259K |
|
3627
CALL
PVH
PVH
$3.49B
| $490K | ﹤0.01% |
6,600
+3,400
| +106% | +$291K |
|
3628
CALL
Granite Construction
GVA
$5.14B
| $490K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$408K |
|
|
TPC
3629
PUT
Tutor Perini Cor
TPC
$4.41B
| $490K | ﹤0.01% |
5,900
+100
| +2% | +$8.05K |
|
3630
CALL
Rocket Pharmaceuticals
RCKT
$287M
| $489K | ﹤0.01% |
143,100
+24,600
| +21% | +$81.8K |
|
3631
ProShares UltraShort Silver
ZSL
$74.5M
| $489K | ﹤0.01% |
15,879
+1,622
| +11% | +$36.4K |
|
3632
CALL
MINISO
MNSO
$2.62B
| $488K | ﹤0.01% |
40,500
-6,600
| -14% | -$92.8K |
|
3633
Compass Diversified
CODI
$843M
| $488K | ﹤0.01% |
45,801
+19,426
| +74% | +$212K |
|
|
3634
PVH
PVH
$3.49B
| $488K | ﹤0.01% |
+6,569
| New | +$562K |
|
3635
PUT
United Therapeutics
UTHR
$20.8B
| $488K | ﹤0.01% |
900
-28,100
| -97% | -$15.8M |
|
3636
Alcon
ALC
$31.5B
| $488K | ﹤0.01% |
7,266
+2,958
| +69% | +$207K |
|
3637
CALL
Construction Partners
ROAD
$5.19B
| $487K | ﹤0.01% |
4,100
-1,600
| -28% | -$190K |
|
3638
CALL
Solventum
SOLV
$15.2B
| $486K | ﹤0.01% |
6,300
+800
| +15% | +$58.3K |
|
3639
PUT
Wipro
WIT
$16B
| $486K | ﹤0.01% |
+215,800
| New | +$459K |
|
3640
CALL
Church & Dwight Co
CHD
$22.7B
| $484K | ﹤0.01% |
5,000
+2,600
| +108% | +$248K |
|
|
BTQ
3641
PUT
BTQ Technologies Corp
BTQ
$421M
| $484K | ﹤0.01% |
89,800
+56,700
| +171% | +$212K |
|
3642
CALL
Paysign
PAYS
$718M
| $483K | ﹤0.01% |
59,000
+37,900
| +180% | +$251K |
|
3643
PUT
Appian
APPN
$2.51B
| $483K | ﹤0.01% |
21,100
+21,000
| +21,000% | +$467K |
|
|
HUMN
3644
Roundhill Humanoid Robotics ETF
HUMN
$91.9M
| $483K | ﹤0.01% |
13,699
+11,774
| +612% | +$406K |
|
3645
CALL
OneMain Financial
OMF
$6.47B
| $482K | ﹤0.01% |
7,900
-12,600
| -61% | -$710K |
|
|
SF
3646
CALL
Stifel
SF
$10.6B
| $481K | ﹤0.01% |
6,900
+5,800
| +527% | +$432K |
|
|
ONDG
3647
PUT
Leverage Shares 2X Long ONDS Daily ETF
ONDG
$22.3M
| $481K | ﹤0.01% |
54,200
+52,100
| +2,481% | +$297K |
|
|
BRSL
3648
Brightstar Lottery PLC
BRSL
$1.8B
| $481K | ﹤0.01% |
44,839
+28,342
| +172% | +$337K |
|
3649
Celcuity
CELC
$3.9B
| $481K | ﹤0.01% |
+4,593
| New | +$530K |
|
3650
ICICI Bank
IBN
$98B
| $480K | ﹤0.01% |
16,544
-2,781
| -14% | -$75.2K |
|
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.