We are live on !
Find out more
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 | |
|---|---|---|---|---|---|---|---|
101
PUT
Berkshire Hathaway Class B
BRK.B
$1.24T
| $158M | 0.09% |
317,900
+106,100
| +50% | +$53.5M |
2021 Q2
21 quarters
|
|
102
CALL
Applied Materials
AMAT
$296B
| $158M | 0.09% |
308,600
+24,300
| +9% | +$12.3M |
2021 Q1
22 quarters
|
|
103
CALL
Walmart Inc
WMT
$996B
| $156M | 0.09% |
1,504,000
+186,600
| +14% | +$20.5M |
2021 Q2
21 quarters
|
|
104
CALL
Strive Inc
ASST
$2.74B
| $156M | 0.08% |
5,101,000
+419,200
| +9% | +$7.78M |
2025 Q2
5 quarters
|
|
105
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$4.02B
| $150M | 0.08% |
1,006,200
+272,100
| +37% | +$54.7M |
2014 Q4
47 quarters
|
|
106
CALL
iShares Morningstar Value ETF
ILCV
$1.4B
| $149M | 0.08% |
2,079,900
+720,800
| +53% | +$76.6M |
2014 Q4
47 quarters
|
|
107
PUT
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $149M | 0.08% |
2,495,200
+648,100
| +35% | +$38.6M |
2024 Q2
9 quarters
|
|
108
CALL
ASML
ASML
$581B
| $148M | 0.08% |
81,600
+13,000
| +19% | +$22.5M |
2014 Q4
47 quarters
|
|
109
CALL
Lam Research
LRCX
$278B
| $145M | 0.08% |
442,800
+4,000
| +0.9% | +$1.25M |
2014 Q4
47 quarters
|
|
110
CALL
ExxonMobil
XOM
$671B
| $144M | 0.08% |
884,400
-275,900
| -24% | -$43.1M |
2021 Q2
21 quarters
|
|
111
PUT
Lumentum
LITE
$53.1B
| $143M | 0.08% |
147,400
-71,800
| -33% | -$60.7M |
2021 Q1
22 quarters
|
|
112
CALL
Moderna
MRNA
$101B
| $143M | 0.08% |
741,900
+275,700
| +59% | +$29.7M |
2020 Q4
23 quarters
|
|
113
CALL
ServiceNow
NOW
$103B
| $138M | 0.07% |
1,027,500
-46,800
| -4% | -$5.75M |
2014 Q4
47 quarters
|
|
114
iShares Russell 2000 ETF
IWM
$77.9B
| $137M | 0.07% |
492,550
-44,260
| -8% | -$13M |
2026 Q1
2 quarters
|
|
115
PUT
Cisco
CSCO
$387B
| $136M | 0.07% |
1,267,400
-730,000
| -37% | -$82.2M |
2021 Q1
22 quarters
|
|
116
PUT
Bank of America
BAC
$350B
| $135M | 0.07% |
2,488,400
+84,900
| +4% | +$5.17M |
2019 Q1
30 quarters
|
|
117
CALL
Citigroup
C
$202B
| $135M | 0.07% |
1,043,900
-285,400
| -21% | -$38.4M |
2014 Q4
47 quarters
|
|
|
118
Amazon
AMZN
$2.93T
| $127M | 0.07% |
508,815
+103,617
| +26% | +$26.3M |
2026 Q1
2 quarters
|
|
119
CALL
Boeing
BA
$137B
| $125M | 0.07% |
673,100
+133,900
| +25% | +$28.7M |
2015 Q1
46 quarters
|
|
120
PUT
JPMorgan Chase
JPM
$908B
| $122M | 0.07% |
369,200
-275,600
| -43% | -$96.4M |
2014 Q4
47 quarters
|
|
|
121
CALL
Berkshire Hathaway Class B
BRK.B
$1.24T
| $122M | 0.07% |
244,900
-26,300
| -10% | -$13.3M |
2021 Q2
21 quarters
|
|
122
CALL
Iris Energy
IREN
$8.37B
| $119M | 0.06% |
2,918,800
+638,900
| +28% | +$26.2M |
2023 Q1
14 quarters
|
|
123
PUT
Super Micro Computer
SMCI
$18.3B
| $117M | 0.06% |
2,856,600
+284,000
| +11% | +$9.7M |
2022 Q2
17 quarters
|
|
124
CALL
Visa
V
$789B
| $116M | 0.06% |
323,900
+13,400
| +4% | +$4.9M |
2014 Q4
47 quarters
|
|
|
125
CALL
Bank of America
BAC
$350B
| $116M | 0.06% |
2,136,500
+369,100
| +21% | +$22.5M |
2019 Q1
30 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.