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Simplex Trading Portfolio holdings
AUM
$184B
Turnover
28.44%
1-Year Est. Return
51.71%
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
-0.22%
1 Year Est. Return
+51.71%
3 Year Est. Return
+194.66%
5 Year Est. Return
+164.83%
10 Year Est. Return
+968.67%
AUM
$184B
AUM Growth
+$13.3B
(+7.8%)
Cap. Flow
-$519M
Cap. Flow % of AUM
Cap. Flow %
-0.28%
Top 10 Holdings %
Top 10 Hldgs %
50.68%
Holding
10,644
New
1,493
Increased
3,697
Reduced
3,633
Closed
1,534
Avg Time Held
Equity + Options
3
years
Top 10 Avg Time Held
Equity + Options
3.9
years
Top 20 Avg Time Held
Equity + Options
4.3
years
Avg Time Held Equity only
0.5
years
Top 10 Avg Time Held Equity only
0.5
years
Top 20 Avg Time Held Equity only
0.4
years
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$92.6M |
| 2 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$80.6M |
| 3 |
Amazon
AMZN
|
+$26.3M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$25.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$20.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class A
GOOGL
|
+$128M |
| 2 |
NVIDIA
NVDA
|
+$97.8M |
| 3 |
Tesla
TSLA
|
+$53.9M |
| 4 |
Micron Technology
MU
|
+$50M |
| 5 |
United States Oil Fund
USO
|
+$49.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.84% |
| 2 | Technology | 0.45% |
| 3 | Consumer Discretionary | 0.14% |
| 4 | Healthcare | 0.14% |
| 5 | Financials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
5101
Brookfield Renewable
BEP
$8.96B
| $133K | ﹤0.01% |
+4,741
| New | +$151K |
2026 Q3
0 quarters
|
|
5102
PUT
Companhia Siderúrgica Nacional
SID
$1.02B
| $133K | ﹤0.01% |
125,800
-15,800
| -11% | -$16.5K |
2026 Q1
2 quarters
|
|
5103
Frontdoor
FTDR
$6.45B
| $133K | ﹤0.01% |
1,823
-1,997
| -52% | -$157K |
2026 Q2
1 quarter
|
|
5104
First Watch Restaurant Group
FWRG
$799M
| $133K | ﹤0.01% |
13,093
-747
| -5% | -$8.98K |
2026 Q1
2 quarters
|
|
5105
Federal Realty Investment Trust
FRT
$9.7B
| $133K | ﹤0.01% |
1,227
+706
| +136% | +$83.6K |
2026 Q2
1 quarter
|
|
5106
CALL
Protolabs
PRLB
$1.64B
| $133K | ﹤0.01% |
+1,400
| New | +$115K |
2026 Q3
0 quarters
|
|
5107
PUT
HealthEquity
HQY
$8.52B
| $133K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$137K |
2017 Q4
35 quarters
|
|
5108
SoundHound AI
SOUN
$1.76B
| $133K | ﹤0.01% |
+22,022
| New | +$145K |
2026 Q3
0 quarters
|
|
5109
iQIYI
IQ
$862M
| $132K | ﹤0.01% |
131,949
-135,622
| -51% | -$151K |
2026 Q2
1 quarter
|
|
5110
2x Solana ETF
SOLT
$103M
| $132K | ﹤0.01% |
1,784
+190
| +12% | +$8.88K |
2026 Q1
2 quarters
|
|
5111
PUT
AAR Corp
AIR
$4.35B
| $132K | ﹤0.01% |
1,300
+1,100
| +550% | +$145K |
2025 Q3
4 quarters
|
|
5112
Vaalco Energy
EGY
$582M
| $132K | ﹤0.01% |
23,260
-19,958
| -46% | -$113K |
2026 Q1
2 quarters
|
|
5113
CALL
Extra Space Storage
EXR
$33B
| $132K | ﹤0.01% |
+1,000
| New | +$144K |
2026 Q3
0 quarters
|
|
5114
PUT
Arcturus Therapeutics
ARCT
$243M
| $131K | ﹤0.01% |
9,600
+3,800
| +66% | +$39.7K |
2020 Q3
24 quarters
|
|
5115
PUT
Deluxe
DLX
$1.23B
| $131K | ﹤0.01% |
5,700
+5,600
| +5,600% | +$137K |
2020 Q1
26 quarters
|
|
5116
PUT
Miami International Holdings
MIAX
$3.61B
| $131K | ﹤0.01% |
3,900
-33,700
| -90% | -$1.41M |
2025 Q3
4 quarters
|
|
5117
Tyler Technologies
TYL
$16.8B
| $131K | ﹤0.01% |
+410
| New | +$135K |
2026 Q3
0 quarters
|
|
5118
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.48B
| $131K | ﹤0.01% |
3,300
-266,200
| -99% | -$10.8M |
2017 Q4
35 quarters
|
|
5119
CALL
Aviat Networks
AVNW
$218M
| $130K | ﹤0.01% |
6,500
+4,800
| +282% | +$98.8K |
2025 Q1
6 quarters
|
|
5120
PUT
Onity Group
ONIT
$228M
| $130K | ﹤0.01% |
4,600
-800
| -15% | -$29.1K |
2024 Q4
7 quarters
|
|
5121
PUT
Daqo New Energy
DQ
$773M
| $130K | ﹤0.01% |
11,400
-46,900
| -80% | -$594K |
2021 Q1
22 quarters
|
|
5122
PUT
Bloomin' Brands
BLMN
$868M
| $130K | ﹤0.01% |
16,800
-1,000
| -6% | -$9.25K |
2018 Q2
33 quarters
|
|
5123
Hello Group
MOMO
$632M
| $130K | ﹤0.01% |
26,883
-13,479
| -33% | -$75.6K |
2025 Q1
6 quarters
|
|
5124
CALL
DELISTED
Beazer Homes USA
BZH
| $130K | ﹤0.01% |
3,900
-125,800
| -97% | -$4.11M |
2016 Q1
42 quarters
|
|
5125
PUT
AFC Gamma
AFCG
$74.8M
| $130K | ﹤0.01% |
36,100
| – | – |
2025 Q3
4 quarters
|
|
Similar funds
Simplex Trading's Q3 2026 Portfolio in Review
As of Q3 2026, Simplex Trading held 10,644 positions worth $184B, up 7.8% from $171B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q3 2026 filing shows 1,493 new, 3,697 increased, 3,633 reduced and 1,534 closed positions. Its largest new stake was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M. The largest sale was Alphabet (Google) Class A, an estimated $128M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q3 2026 buy was iShares iBoxx $ High Yield Corporate Bond ETF: 1,017,542 shares worth $78.6M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q3 2026, an estimated $92.6M increase.
- Simplex Trading's biggest Q3 2026 reduction was NVIDIA, cutting an estimated $97.8M.
- Simplex Trading fully exited Alphabet (Google) Class A in Q3 2026, selling an estimated $128M.
- Simplex Trading's ten largest holdings make up 51% of its $184B portfolio in Q3 2026.
- Simplex Trading opened 1,493 new positions and closed 1,534 in Q3 2026.
- Simplex Trading's portfolio value rose 7.8% quarter-over-quarter to $184B.
Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.