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 | |
|---|---|---|---|---|---|---|---|
7801
CALL
Future Fuel
FF
$246M
| $8.59K | ﹤0.01% |
+1,900
| New | +$8.19K |
2026 Q2
0 quarters
|
|
7802
PUT
Scully Royalty
SRL
$69.7M
| $8.58K | ﹤0.01% |
1,400
| – | – |
2026 Q1
1 quarter
|
|
7803
PUT
Sinclair Inc
SBGI
$909M
| $8.55K | ﹤0.01% |
600
-10,100
| -94% | -$145K |
2015 Q3
43 quarters
|
|
7804
CALL
Vox Royalty Corp
VOXR
$336M
| $8.51K | ﹤0.01% |
1,800
+1,300
| +260% | +$7.15K |
2026 Q1
1 quarter
|
|
7805
CALL
Teads Holding Co
TEAD
$33.4M
| $8.51K | ﹤0.01% |
11,100
| – | – |
2026 Q1
1 quarter
|
|
7806
CALL
Nkarta
NKTX
$125M
| $8.49K | ﹤0.01% |
3,000
-21,100
| -88% | -$59.4K |
2025 Q4
2 quarters
|
|
7807
PUT
El Pollo Loco
LOCO
$443M
| $8.48K | ﹤0.01% |
+500
| New | +$7.16K |
2026 Q2
0 quarters
|
|
7808
iShares Global Timber & Forestry ETF
WOOD
$253M
| $8.48K | ﹤0.01% |
128
-392
| -75% | -$26.8K |
2026 Q1
1 quarter
|
|
7809
CALL
NETSTREIT Corp
NTST
$1.73B
| $8.45K | ﹤0.01% |
+400
| New | +$8.11K |
2026 Q2
0 quarters
|
|
7810
PUT
Tuya Inc
TUYA
$1.02B
| $8.45K | ﹤0.01% |
4,800
+1,400
| +41% | +$3.05K |
2025 Q1
5 quarters
|
|
7811
Puma Biotechnology
PBYI
$581M
| $8.44K | ﹤0.01% |
+1,041
| New | +$7.62K |
2026 Q2
0 quarters
|
|
7812
CALL
Brunswick
BC
$4.24B
| $8.42K | ﹤0.01% |
100
-1,300
| -93% | -$104K |
2018 Q2
32 quarters
|
|
7813
iShares MSCI Japan Small-Cap ETF
SCJ
$233M
| $8.42K | ﹤0.01% |
80
-172
| -68% | -$17.8K |
2026 Q1
1 quarter
|
|
7814
CALL
Wyndham Hotels & Resorts
WH
$5.25B
| $8.42K | ﹤0.01% |
+100
| New | +$8.29K |
2026 Q2
0 quarters
|
|
7815
PUT
Solana Company
HSDT
$149M
| $8.42K | ﹤0.01% |
5,100
-10,100
| -66% | -$19.3K |
2025 Q4
2 quarters
|
|
7816
Leverage Shares 2X Long PLUG Daily ETF
PLUL
$1.31M
| $8.41K | ﹤0.01% |
+625
| New | +$12.9K |
2026 Q2
0 quarters
|
|
7817
CALL
Victory Capital Holdings
VCTR
$6.59B
| $8.41K | ﹤0.01% |
100
-100
| -50% | -$8.05K |
2025 Q4
2 quarters
|
|
7818
PUT
Knife River
KNF
$3B
| $8.36K | ﹤0.01% |
100
-500
| -83% | -$41.3K |
2026 Q1
1 quarter
|
|
7819
PUT
James River Group Holdings
JRVR
$182M
| $8.36K | ﹤0.01% |
1,900
+1,400
| +280% | +$6.89K |
2026 Q1
1 quarter
|
|
7820
KraneShares Electric Vehicles and Future Mobility Index ETF
KARS
$65.7M
| $8.36K | ﹤0.01% |
+265
| New | +$9.2K |
2026 Q2
0 quarters
|
|
7821
PUT
Henry Schein
HSIC
$9.5B
| $8.35K | ﹤0.01% |
+100
| New | +$7.64K |
2026 Q2
0 quarters
|
|
7822
PUT
LoveSac
LOVE
$220M
| $8.34K | ﹤0.01% |
500
-5,900
| -92% | -$93.3K |
2019 Q3
27 quarters
|
|
7823
CALL
Kontoor Brands
KTB
$4.16B
| $8.33K | ﹤0.01% |
100
| – | – |
2025 Q4
2 quarters
|
|
7824
PUT
Manitowoc
MTW
$800M
| $8.33K | ﹤0.01% |
+600
| New | +$7.62K |
2026 Q2
0 quarters
|
|
7825
eGain
EGAN
$149M
| $8.33K | ﹤0.01% |
1,322
+1,091
| +472% | +$8K |
2025 Q1
5 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.