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 | |
|---|---|---|---|---|---|---|---|
7426
CALL
Jack Henry & Associates
JKHY
$11.3B
| $13.8K | ﹤0.01% |
100
-100
| -50% | -$14.2K |
2021 Q1
21 quarters
|
|
7427
PUT
Better Home & Finance Holding
BETR
$315M
| $13.8K | ﹤0.01% |
500
-3,100
| -86% | -$100K |
2026 Q1
1 quarter
|
|
7428
CALL
Gran Tierra Energy
GTE
$402M
| $13.8K | ﹤0.01% |
2,200
-11,400
| -84% | -$93.2K |
2026 Q1
1 quarter
|
|
7429
CALL
Redwood Trust
RWT
$392M
| $13.7K | ﹤0.01% |
2,900
+400
| +16% | +$2.17K |
2019 Q2
28 quarters
|
|
7430
Organogenesis Holdings
ORGO
$133M
| $13.7K | ﹤0.01% |
5,625
+1,130
| +25% | +$2.76K |
2025 Q4
2 quarters
|
|
7431
CALL
RCI Hospitality Holdings
RICK
$206M
| $13.7K | ﹤0.01% |
500
-12,500
| -96% | -$317K |
2019 Q3
27 quarters
|
|
7432
Atea Pharmaceuticals
AVIR
$325M
| $13.6K | ﹤0.01% |
2,933
-3,311
| -53% | -$16.5K |
2025 Q2
4 quarters
|
|
7433
PUT
Sypris Solutions
SYPR
$39.9M
| $13.6K | ﹤0.01% |
+5,600
| New | +$17.4K |
2026 Q2
0 quarters
|
|
7434
Brazil Potash Corp
GRO
$110M
| $13.6K | ﹤0.01% |
+6,325
| New | +$17.1K |
2026 Q2
0 quarters
|
|
7435
CALL
T-Rex 2X Long Bitcoin Daily Target ETF
BTCL
$34.5M
| $13.6K | ﹤0.01% |
2,100
-2,500
| -54% | -$41.9K |
2024 Q4
6 quarters
|
|
7436
PUT
Compass Therapeutics
CMPX
$144M
| $13.6K | ﹤0.01% |
6,200
-4,100
| -40% | -$12.1K |
2025 Q1
5 quarters
|
|
7437
CALL
OmniAb
OABI
$695M
| $13.5K | ﹤0.01% |
+5,500
| New | +$10.9K |
2026 Q2
0 quarters
|
|
7438
Platinum Group Metals
PLG
$137M
| $13.5K | ﹤0.01% |
10,012
-46,913
| -82% | -$78.5K |
2023 Q2
12 quarters
|
|
7439
Leverage Shares 2X Long BULL Daily ETF
BULG
$2.55M
| $13.5K | ﹤0.01% |
416
+410
| +6,833% | +$14.4K |
2026 Q1
1 quarter
|
|
7440
Owlet
OWLT
$121M
| $13.5K | ﹤0.01% |
2,347
+1,867
| +389% | +$9.9K |
2026 Q1
1 quarter
|
|
7441
REX-Osprey SOL + Staking ETF
SSK
$92.6M
| $13.5K | ﹤0.01% |
1,355
-2,625
| -66% | -$28.7K |
2025 Q3
3 quarters
|
|
7442
PUT
AvePoint
AVPT
$3.4B
| $13.5K | ﹤0.01% |
1,200
+100
| +9% | +$1.03K |
2021 Q4
18 quarters
|
|
7443
AudioEye
AEYE
$102M
| $13.4K | ﹤0.01% |
+2,312
| New | +$16.1K |
2026 Q2
0 quarters
|
|
7444
CALL
StealthGas
GASS
$305M
| $13.4K | ﹤0.01% |
+1,700
| New | +$16K |
2026 Q2
0 quarters
|
|
7445
York Space Systems
YSS
$838M
| $13.4K | ﹤0.01% |
+545
| New | +$16.9K |
2026 Q2
0 quarters
|
|
7446
CALL
Lear
LEA
$5.85B
| $13.4K | ﹤0.01% |
100
-900
| -90% | -$121K |
2016 Q2
40 quarters
|
|
7447
PUT
abrdn Bloomberg All Commodity Longer Dated Strategy K-1 Free ETF
BCD
$443M
| $13.4K | ﹤0.01% |
+600
| New | +$21.9K |
2026 Q2
0 quarters
|
|
7448
CALL
Immix Biopharma
IMMX
$692M
| $13.4K | ﹤0.01% |
+1,300
| New | +$12.1K |
2026 Q2
0 quarters
|
|
7449
Tradr 2X Long SpaceX Daily ETF
SPCM
$18.4M
| $13.4K | ﹤0.01% |
+517
| New | +$13.9K |
2026 Q2
0 quarters
|
|
7450
Defiance Daily Target 2x Long OKLO ETF
OKLL
$262M
| $13.3K | ﹤0.01% |
+543
| New | +$22.4K |
2026 Q2
0 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.