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 | |
|---|---|---|---|---|---|---|
|
ABTC
4451
PUT
American Bitcoin Corp
ABTC
$638M
| $247K | ﹤0.01% |
24,207
+3,460
| +17% | +$52.9K |
|
4452
CALL
Fortune Brands Innovations
FBIN
$4.54B
| $247K | ﹤0.01% |
4,500
+2,900
| +181% | +$116K |
|
4453
CALL
Taboola.com
TBLA
$924M
| $247K | ﹤0.01% |
49,400
+48,600
| +6,075% | +$212K |
|
|
UNHG
4454
Leverage Shares 2X Long UNH Daily ETF
UNHG
$59.1M
| $247K | ﹤0.01% |
10,773
+1,646
| +18% | +$30.8K |
|
4455
PUT
Remitly
RELY
$4.5B
| $247K | ﹤0.01% |
11,000
-63,500
| -85% | -$1.3M |
|
4456
PUT
Angi Inc
ANGI
$235M
| $246K | ﹤0.01% |
41,400
+28,700
| +226% | +$177K |
|
4457
Ryan Specialty Holdings
RYAN
$4.62B
| $246K | ﹤0.01% |
6,509
-23,371
| -78% | -$793K |
|
4458
Sprott Copper Miners ETF
COPP
$282M
| $245K | ﹤0.01% |
6,398
+95
| +2% | +$3.8K |
|
4459
CALL
Flowers Foods
FLO
$1.2B
| $245K | ﹤0.01% |
31,000
-2,900
| -9% | -$23.2K |
|
4460
Werner Enterprises
WERN
$2.03B
| $245K | ﹤0.01% |
5,614
+5,161
| +1,139% | +$194K |
|
4461
CALL
McEwen Inc
MUX
$1.1B
| $245K | ﹤0.01% |
13,500
-81,100
| -86% | -$1.75M |
|
|
HAWK
4462
PUT
HawkEye 360 Inc
HAWK
$1.51B
| $245K | ﹤0.01% |
+12,100
| New | +$334K |
|
4463
PUT
Expeditors International
EXPD
$24.4B
| $244K | ﹤0.01% |
1,500
-500
| -25% | -$77.3K |
|
4464
Flutter Entertainment
FLUT
$13B
| $244K | ﹤0.01% |
+2,392
| New | +$247K |
|
4465
Element Solutions
ESI
$8.67B
| $244K | ﹤0.01% |
+5,112
| New | +$212K |
|
4466
PUT
Camden National
CAC
$947M
| $244K | ﹤0.01% |
4,500
+4,300
| +2,150% | +$216K |
|
4467
Golar LNG
GLNG
$4.92B
| $244K | ﹤0.01% |
4,893
+792
| +19% | +$41.9K |
|
4468
GlobalFoundries
GFS
$26.6B
| $244K | ﹤0.01% |
2,956
-33,439
| -92% | -$2.34M |
|
4469
PUT
Warrior Met Coal
HCC
$4.65B
| $243K | ﹤0.01% |
3,000
-24,900
| -89% | -$2.25M |
|
|
UROY
4470
PUT
Uranium Royalty Corp
UROY
$1.56B
| $243K | ﹤0.01% |
87,500
+7,900
| +10% | +$27.7K |
|
4471
CALL
TriMas Corp
TRS
$1.41B
| $243K | ﹤0.01% |
5,400
| – | – |
|
4472
PUT
Global E Online
GLBE
$6.72B
| $243K | ﹤0.01% |
7,000
-16,800
| -71% | -$531K |
|
|
ALMU
4473
PUT
Aeluma Inc
ALMU
$243M
| $243K | ﹤0.01% |
11,000
+8,400
| +323% | +$180K |
|
4474
Ross Stores
ROST
$75.1B
| $243K | ﹤0.01% |
+1,140
| New | +$257K |
|
|
KDEF
4475
PLUS Korea Defense Industry Index ETF
KDEF
$109M
| $242K | ﹤0.01% |
5,982
+4,945
| +477% | +$267K |
|
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.