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Simplex Trading Portfolio holdings
AUM
$171B
Turnover
30.09%
1-Year Est. Return
85%
Simplex Trading is a market maker that trades for its own account, mainly in US stock options and options on futures, using software it builds itself. Its work pairs software developers with data-driven traders. It was founded in Chicago in 2004, and Erik Swanson, who joined straight out of college as a trader, has been its chief executive since 2014. It also invests in early-stage financial and technology start-ups.
This Fund
S&P 500
This Quarter Est. Return
+39.06%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$171B
AUM Growth
+$21.5B
(+14%)
Cap. Flow
-$29.5M
Cap. Flow % of AUM
Cap. Flow %
-0.02%
Top 10 Holdings %
Top 10 Hldgs %
49.56%
Holding
10,638
New
1,714
Increased
3,712
Reduced
3,486
Closed
1,487
Avg Time Held
Equity + Options
2.9
years
Top 10 Avg Time Held
Equity + Options
3.8
years
Top 20 Avg Time Held
Equity + Options
4.1
years
Avg Time Held Equity only
0.5
years
Top 10 Avg Time Held Equity only
0.3
years
Top 20 Avg Time Held Equity only
0.3
years
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 | |
|---|---|---|---|---|---|---|---|
5576
CALL
Electromed
ELMD
$229M
| $97.3K | ﹤0.01% |
2,300
-900
| -28% | -$28.9K |
2025 Q1
5 quarters
|
|
5577
PUT
Canada Goose Holdings
GOOS
$785M
| $97K | ﹤0.01% |
10,200
+4,300
| +73% | +$45.3K |
2017 Q1
37 quarters
|
|
5578
CALL
HNI Corp
HNI
$3.46B
| $97K | ﹤0.01% |
+2,400
| New | +$81.7K |
2026 Q2
0 quarters
|
|
5579
Life360
LIF
$3.71B
| $96.9K | ﹤0.01% |
+1,751
| New | +$77.9K |
2026 Q2
0 quarters
|
|
5580
CALL
Hyatt Hotels
H
$17.4B
| $96.9K | ﹤0.01% |
500
-300
| -38% | -$52.5K |
2018 Q1
33 quarters
|
|
5581
PUT
Ametek
AME
$57.7B
| $96.8K | ﹤0.01% |
+400
| New | +$92.1K |
2026 Q2
0 quarters
|
|
5582
Franklin XRP ETF
XRPZ
$198M
| $96.6K | ﹤0.01% |
8,513
+7,869
| +1,222% | +$112K |
2025 Q4
2 quarters
|
|
5583
CALL
Texas Roadhouse
TXRH
$12B
| $96.6K | ﹤0.01% |
500
-2,000
| -80% | -$341K |
2018 Q2
32 quarters
|
|
5584
CALL
Aemetis
AMTX
$93.1M
| $96.4K | ﹤0.01% |
58,800
-50,500
| -46% | -$123K |
2020 Q4
22 quarters
|
|
5585
CALL
Enova International
ENVA
$4.43B
| $96.3K | ﹤0.01% |
+400
| New | +$68.8K |
2026 Q2
0 quarters
|
|
5586
CALL
TRX Gold Corp
TRX
$334M
| $96.3K | ﹤0.01% |
116,700
+9,600
| +9% | +$11.1K |
2025 Q4
2 quarters
|
|
5587
Evolent Health
EVH
$481M
| $96.1K | ﹤0.01% |
+17,722
| New | +$67.9K |
2026 Q2
0 quarters
|
|
5588
CALL
Myomo
MYO
$51.5M
| $96K | ﹤0.01% |
92,300
+87,700
| +1,907% | +$85.5K |
2025 Q4
2 quarters
|
|
5589
Coty
COTY
$2.95B
| $96K | ﹤0.01% |
44,433
-27,094
| -38% | -$58.4K |
2025 Q3
3 quarters
|
|
5590
First Trust Natural Gas ETF
FCG
$701M
| $95.9K | ﹤0.01% |
3,604
-119,271
| -97% | -$3.5M |
2024 Q3
7 quarters
|
|
5591
CALL
NETSCOUT
NTCT
$2.86B
| $95.8K | ﹤0.01% |
2,200
-500
| -19% | -$18.8K |
2025 Q4
2 quarters
|
|
5592
CALL
Sundial Growers
SNDL
$318M
| $95.7K | ﹤0.01% |
70,900
-10,200
| -13% | -$14.6K |
2019 Q4
26 quarters
|
|
5593
Genpact
G
$6.52B
| $95.6K | ﹤0.01% |
+3,478
| New | +$114K |
2026 Q2
0 quarters
|
|
5594
Roundhill Uranium ETF
UX
$4.6M
| $95.5K | ﹤0.01% |
3,475
-162
| -4% | -$4.82K |
2025 Q4
2 quarters
|
|
5595
PUT
NCR Atleos
NATL
$3.38B
| $95.5K | ﹤0.01% |
2,200
-500
| -19% | -$22.2K |
2026 Q1
1 quarter
|
|
5596
CALL
Element Solutions
ESI
$8.63B
| $95.5K | ﹤0.01% |
2,000
-92,000
| -98% | -$3.82M |
2021 Q2
20 quarters
|
|
5597
PUT
Momentus
MNTS
$46.8M
| $95.4K | ﹤0.01% |
+14,200
| New | +$114K |
2026 Q2
0 quarters
|
|
5598
Select STOXX Europe Aerospace & Defense ETF
EUAD
$953M
| $95.4K | ﹤0.01% |
2,262
-3,811
| -63% | -$158K |
2025 Q4
2 quarters
|
|
5599
PUT
High Tide
HITI
$237M
| $95.3K | ﹤0.01% |
41,800
+800
| +2% | +$1.9K |
2024 Q1
9 quarters
|
|
5600
PUT
Equifax
EFX
$21.1B
| $95.2K | ﹤0.01% |
600
-400
| -40% | -$68.2K |
2015 Q3
43 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.