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 | |
|---|---|---|---|---|---|---|---|
7301
PUT
Grupo Cibest SA
CIB
$23.1B
| $15.9K | ﹤0.01% |
200
| – | – |
2023 Q1
13 quarters
|
|
7302
Matthews International
MATW
$601M
| $15.9K | ﹤0.01% |
590
-1,611
| -73% | -$43.3K |
2025 Q1
5 quarters
|
|
7303
Pacer US Cash Cows 100 ETF
COWZ
$19.7B
| $15.9K | ﹤0.01% |
255
+100
| +65% | +$6.32K |
2025 Q3
3 quarters
|
|
7304
RPC Inc
RES
$1.39B
| $15.8K | ﹤0.01% |
2,715
-8,620
| -76% | -$60.1K |
2025 Q4
2 quarters
|
|
7305
CALL
Unitil
UTL
$1.01B
| $15.8K | ﹤0.01% |
300
+200
| +200% | +$10.4K |
2025 Q4
2 quarters
|
|
7306
Fidelity MSCI Financials Index ETF
FNCL
$2.31B
| $15.8K | ﹤0.01% |
+206
| New | +$15.3K |
2026 Q2
0 quarters
|
|
7307
Direxion Daily NVDA Bull 2X ETF
NVDU
$439M
| $15.8K | ﹤0.01% |
133
-2,866
| -96% | -$375K |
2025 Q4
2 quarters
|
|
7308
Hyperfine
HYPR
$76.8M
| $15.8K | ﹤0.01% |
11,676
-9,704
| -45% | -$14K |
2025 Q4
2 quarters
|
|
7309
CALL
Expensify
EXFY
$236M
| $15.8K | ﹤0.01% |
8,800
+8,400
| +2,100% | +$9.43K |
2025 Q3
3 quarters
|
|
7310
Radian Group
RDN
$4.73B
| $15.7K | ﹤0.01% |
+418
| New | +$14.8K |
2026 Q2
0 quarters
|
|
7311
LENZ Therapeutics
LENZ
$99.3M
| $15.7K | ﹤0.01% |
2,772
-4,155
| -60% | -$33.5K |
2026 Q1
1 quarter
|
|
7312
PUT
Lands' End
LE
$283M
| $15.7K | ﹤0.01% |
1,500
+500
| +50% | +$5.75K |
2026 Q1
1 quarter
|
|
7313
CALL
Runway Growth Finance
RWAY
$271M
| $15.7K | ﹤0.01% |
2,800
| – | – |
2025 Q4
2 quarters
|
|
7314
New Found Gold
NFGC
$607M
| $15.7K | ﹤0.01% |
10,195
-35,835
| -78% | -$68.7K |
2025 Q4
2 quarters
|
|
7315
CALL
Sportsman's Warehouse
SPWH
$41.9M
| $15.7K | ﹤0.01% |
11,800
+11,700
| +11,700% | +$16K |
2025 Q2
4 quarters
|
|
7316
Shinhan Financial Group
SHG
$31.1B
| $15.7K | ﹤0.01% |
+248
| New | +$16.3K |
2026 Q2
0 quarters
|
|
7317
CALL
Zymeworks
ZYME
$2.02B
| $15.7K | ﹤0.01% |
600
-4,800
| -89% | -$122K |
2019 Q1
29 quarters
|
|
7318
CALL
First Bancorp
FBP
$4.14B
| $15.6K | ﹤0.01% |
600
+500
| +500% | +$12K |
2026 Q1
1 quarter
|
|
7319
PUT
Stem
STEM
$29M
| $15.6K | ﹤0.01% |
2,000
+1,300
| +186% | +$12.1K |
2020 Q4
22 quarters
|
|
7320
PUT
Financial Institutions
FISI
$800M
| $15.6K | ﹤0.01% |
400
-2,200
| -85% | -$78.2K |
2025 Q4
2 quarters
|
|
7321
PUT
Westlake Chemical Partners
WLKP
$745M
| $15.6K | ﹤0.01% |
700
+200
| +40% | +$4.56K |
2024 Q1
9 quarters
|
|
7322
PUT
AH Realty Trust
AHRT
$455M
| $15.6K | ﹤0.01% |
2,200
+100
| +5% | +$642 |
2019 Q4
26 quarters
|
|
7323
Zura Bio
ZURA
$322M
| $15.6K | ﹤0.01% |
2,640
-15,851
| -86% | -$75.5K |
2025 Q4
2 quarters
|
|
7324
Star Group
SGU
$431M
| $15.5K | ﹤0.01% |
1,211
+57
| +5% | +$723 |
2026 Q1
1 quarter
|
|
7325
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $15.5K | ﹤0.01% |
2,300
-13,100
| -85% | -$387K |
2026 Q1
1 quarter
|
|
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.