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 | |
|---|---|---|---|---|---|---|---|
7376
CALL
Washington Trust Bancorp
WASH
$748M
| $14.6K | ﹤0.01% |
400
+300
| +300% | +$10K |
2025 Q3
3 quarters
|
|
7377
New Pacific Metals
NEWP
$1.07B
| $14.6K | ﹤0.01% |
3,628
+197
| +6% | +$968 |
2023 Q1
13 quarters
|
|
7378
RenaissanceRe
RNR
$15.1B
| $14.6K | ﹤0.01% |
46
-48
| -51% | -$14.4K |
2026 Q1
1 quarter
|
|
7379
VanEck Alternative Asset Manager ETF
GPZ
$225M
| $14.5K | ﹤0.01% |
+678
| New | +$15.5K |
2026 Q2
0 quarters
|
|
7380
PUT
Alpine Income Property Trust
PINE
$312M
| $14.5K | ﹤0.01% |
700
-1,300
| -65% | -$25.2K |
2024 Q1
9 quarters
|
|
7381
CALL
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$587M
| $14.5K | ﹤0.01% |
200
-300
| -60% | -$21.5K |
2023 Q2
12 quarters
|
|
7382
Phreesia
PHR
$790M
| $14.5K | ﹤0.01% |
1,410
-5,979
| -81% | -$55.5K |
2025 Q2
4 quarters
|
|
7383
Sprinklr
CXM
$1.55B
| $14.5K | ﹤0.01% |
2,807
+824
| +42% | +$4.38K |
2026 Q1
1 quarter
|
|
7384
PUT
Terex
TEX
$5.96B
| $14.5K | ﹤0.01% |
200
-900
| -82% | -$56.3K |
2014 Q4
46 quarters
|
|
7385
PUT
Community Trust Bancorp
CTBI
$1.29B
| $14.5K | ﹤0.01% |
200
+100
| +100% | +$6.66K |
2025 Q3
3 quarters
|
|
7386
iShares MSCI All Country Asia ex Japan ETF
AAXJ
$3.62B
| $14.4K | ﹤0.01% |
121
-74
| -38% | -$8.34K |
2025 Q4
2 quarters
|
|
7387
iShares Expanded Tech Sector ETF
IGM
$10.7B
| $14.4K | ﹤0.01% |
+88
| New | +$13.2K |
2026 Q2
0 quarters
|
|
7388
Smith & Nephew
SNN
$12.9B
| $14.4K | ﹤0.01% |
499
+44
| +10% | +$1.37K |
2026 Q1
1 quarter
|
|
7389
PUT
Amarin Corp
AMRN
$245M
| $14.3K | ﹤0.01% |
+900
| New | +$13.3K |
2026 Q2
0 quarters
|
|
7390
Protolabs
PRLB
$2.02B
| $14.3K | ﹤0.01% |
176
-10,603
| -98% | -$746K |
2026 Q1
1 quarter
|
|
7391
PUT
Airship AI Holdings
AISP
$74M
| $14.3K | ﹤0.01% |
6,000
+1,600
| +36% | +$4.08K |
2024 Q3
7 quarters
|
|
7392
CALL
RGC Resources
RGCO
$240M
| $14.3K | ﹤0.01% |
+600
| New | +$13.8K |
2026 Q2
0 quarters
|
|
7393
CALL
Herc Holdings
HRI
$4.46B
| $14.3K | ﹤0.01% |
100
-200
| -67% | -$25.8K |
2014 Q4
46 quarters
|
|
7394
REX-Osprey DOGE ETF
DOJE
$10.7M
| $14.3K | ﹤0.01% |
2,141
+1,938
| +955% | +$17.3K |
2025 Q4
2 quarters
|
|
7395
PUT
Impinj
PI
$4.97B
| $14.3K | ﹤0.01% |
100
-1,400
| -93% | -$183K |
2026 Q1
1 quarter
|
|
7396
Leverage Shares 2X Long PANW Daily ETF
PANG
$10.9M
| $14.3K | ﹤0.01% |
448
-197
| -31% | -$3.1K |
2026 Q1
1 quarter
|
|
7397
PUT
Nouveau Monde Graphite
NMG
$293M
| $14.2K | ﹤0.01% |
9,500
-5,800
| -38% | -$11K |
2025 Q4
2 quarters
|
|
7398
CALL
German American Bancorp
GABC
$1.92B
| $14.2K | ﹤0.01% |
300
+200
| +200% | +$8.79K |
2026 Q1
1 quarter
|
|
7399
Obsidian Energy
OBE
$772M
| $14.2K | ﹤0.01% |
+1,748
| New | +$19.6K |
2026 Q2
0 quarters
|
|
7400
CALL
DELISTED
Leslie's
LESL
| $14.2K | ﹤0.01% |
1,400
-5,700
| -80% | -$22.4K |
2025 Q2
4 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.