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 | Held Since | |
|---|---|---|---|---|---|---|---|
7526
PUT
Orrstown Financial Services
ORRF
$871M
| $12.2K | ﹤0.01% |
+300
| New | +$11.3K |
2026 Q2
0 quarters
|
|
7527
United States 12 Month Natural Gas Fund
UNL
$14.4M
| $12.2K | ﹤0.01% |
+1,911
| New | +$12.4K |
2026 Q2
0 quarters
|
|
7528
Capital Group Dividend Value ETF
CGDV
$38.3B
| $12.2K | ﹤0.01% |
247
-96
| -28% | -$4.52K |
2026 Q1
1 quarter
|
|
7529
PUT
Presidio Production Co
FTW
$305M
| $12.2K | ﹤0.01% |
+1,000
| New | +$11.4K |
2026 Q2
0 quarters
|
|
7530
PUT
H2O America
HTO
$2.47B
| $12.2K | ﹤0.01% |
200
-300
| -60% | -$17.4K |
2024 Q1
9 quarters
|
|
7531
PUT
BJ's Restaurants
BJRI
$1.2B
| $12.1K | ﹤0.01% |
200
| – | – |
2023 Q3
11 quarters
|
|
7532
Accendra Health
ACH
$16.7M
| $12.1K | ﹤0.01% |
3,545
-13,031
| -79% | -$40.5K |
2024 Q2
8 quarters
|
|
7533
PUT
HNI Corp
HNI
$3.43B
| $12.1K | ﹤0.01% |
+300
| New | +$10.2K |
2026 Q2
0 quarters
|
|
7534
PUT
Paymentus
PAY
$4.2B
| $12.1K | ﹤0.01% |
500
-300
| -38% | -$7.36K |
2023 Q4
10 quarters
|
|
7535
CALL
WiMi Hologram Cloud
WIMI
$10.8M
| $12.1K | ﹤0.01% |
8,000
+1,400
| +21% | +$2.38K |
2020 Q4
22 quarters
|
|
7536
PUT
LG Display
LPL
$2.59B
| $12.1K | ﹤0.01% |
3,100
+2,600
| +520% | +$11.9K |
2025 Q4
2 quarters
|
|
7537
Tradr 2X Short SpaceX Daily ETF
SPCG
$9.6M
| $12.1K | ﹤0.01% |
+700
| New | +$13K |
2026 Q2
0 quarters
|
|
7538
Jasper Therapeutics
JSPR
$17M
| $12K | ﹤0.01% |
28,591
-682
| -2% | -$511 |
2026 Q1
1 quarter
|
|
7539
CALL
Incannex Healthcare Limited Common Stock
IXHL
$33.1M
| $12K | ﹤0.01% |
+3,200
| New | +$11.7K |
2026 Q2
0 quarters
|
|
7540
CALL
Liftoff Mobile
LFTO
$2.83B
| $12K | ﹤0.01% |
+500
| New | +$13K |
2026 Q2
0 quarters
|
|
7541
Stevanato
STVN
$5.32B
| $12K | ﹤0.01% |
663
+248
| +60% | +$4.19K |
2025 Q3
3 quarters
|
|
7542
PUT
AGCO
AGCO
$7.43B
| $12K | ﹤0.01% |
100
-100
| -50% | -$11.6K |
2026 Q1
1 quarter
|
|
7543
PUT
Brookfield Business Corp Class A Subordinate Voting Shares
BBUC
$5.71B
| $11.9K | ﹤0.01% |
400
| – | – |
2025 Q3
3 quarters
|
|
7544
CALL
Perspective Therapeutics
CATX
$184M
| $11.9K | ﹤0.01% |
3,500
-51,700
| -94% | -$195K |
2026 Q1
1 quarter
|
|
7545
PUT
Phathom Pharmaceuticals
PHAT
$464M
| $11.9K | ﹤0.01% |
1,100
-2,600
| -70% | -$29.7K |
2022 Q3
15 quarters
|
|
7546
CALL
Concentra Group Holdings
CON
$5.01B
| $11.9K | ﹤0.01% |
+400
| New | +$9.9K |
2026 Q2
0 quarters
|
|
7547
PUT
iRhythm Holdings
IRTC
$4B
| $11.9K | ﹤0.01% |
100
-100
| -50% | -$11.6K |
2019 Q1
29 quarters
|
|
7548
Tradr 2X Long TEM Daily ETF
TEMT
$38.1M
| $11.9K | ﹤0.01% |
483
+342
| +243% | +$6.9K |
2026 Q1
1 quarter
|
|
7549
Zedge
ZDGE
$42.5M
| $11.9K | ﹤0.01% |
3,825
-3,175
| -45% | -$9.8K |
2025 Q2
4 quarters
|
|
7550
Tenaya Therapeutics
TNYA
$87.2M
| $11.8K | ﹤0.01% |
16,035
-34,620
| -68% | -$26.3K |
2023 Q3
11 quarters
|
|
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.