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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 | |
|---|---|---|---|---|---|---|---|
4651
CALL
Ollie's Bargain Outlet
OLLI
$5.63B
| $197K | ﹤0.01% |
2,300
-600
| -21% | -$44.4K |
2015 Q3
44 quarters
|
|
4652
Tradr 2X Long AAOI Daily ETF
AAOX
$27.2M
| $196K | ﹤0.01% |
21,425
+20,768
| +3,161% | +$297K |
2026 Q2
1 quarter
|
|
4653
PUT
TC Energy
TRP
$67.5B
| $196K | ﹤0.01% |
3,400
-7,800
| -70% | -$501K |
2017 Q3
36 quarters
|
|
4654
Materion
MTRN
$4.25B
| $196K | ﹤0.01% |
728
-935
| -56% | -$234K |
2026 Q2
1 quarter
|
|
4655
PUT
Lifestance Health
LFST
$5.35B
| $196K | ﹤0.01% |
16,300
+15,300
| +1,530% | +$180K |
2021 Q4
19 quarters
|
|
4656
PUT
Bread Financial
BFH
$3.74B
| $196K | ﹤0.01% |
2,000
+1,700
| +567% | +$179K |
2026 Q2
1 quarter
|
|
4657
YieldMax TSLA Option Income Strategy ETF
TSLY
$616M
| $195K | ﹤0.01% |
9,054
+3,752
| +71% | +$86.7K |
2025 Q4
3 quarters
|
|
4658
PUT
Tradr 2X Long SMR Daily ETF
SMU
$45.6M
| $195K | ﹤0.01% |
19,100
-4,000
| -17% | -$96.1K |
2025 Q3
4 quarters
|
|
4659
PUT
Federal Realty Investment Trust
FRT
$9.7B
| $195K | ﹤0.01% |
1,800
-500
| -22% | -$59.2K |
2018 Q1
34 quarters
|
|
4660
PUT
abrdn Physical Silver Shares ETF
SIVR
$3.3B
| $195K | ﹤0.01% |
3,400
-21,800
| -87% | -$1.3M |
2019 Q2
29 quarters
|
|
4661
CALL
First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund
GRID
$10.9B
| $195K | ﹤0.01% |
1,100
+400
| +57% | +$72.3K |
2025 Q3
4 quarters
|
|
4662
CALL
RoboStrategy Inc
BOT
$448M
| $194K | ﹤0.01% |
7,400
+6,400
| +640% | +$185K |
2026 Q2
1 quarter
|
|
4663
Angel Studios
ANGX
$902M
| $194K | ﹤0.01% |
+41,622
| New | +$184K |
2026 Q3
0 quarters
|
|
4664
PUT
CEVA Inc
CEVA
$730M
| $194K | ﹤0.01% |
5,500
-30,800
| -85% | -$1.04M |
2025 Q4
3 quarters
|
|
4665
APi Group
APG
$18.5B
| $194K | ﹤0.01% |
+5,025
| New | +$202K |
2026 Q3
0 quarters
|
|
4666
21shares Hyperliquid Staking ETF
THYP
$71.5M
| $194K | ﹤0.01% |
+3,783
| New | +$156K |
2026 Q3
0 quarters
|
|
4667
ReNew
RNW
$2.54B
| $194K | ﹤0.01% |
28,298
-117
| -0.4% | -$765 |
2025 Q2
5 quarters
|
|
4668
PUT
Sonos
SONO
$2.13B
| $193K | ﹤0.01% |
10,800
+4,200
| +64% | +$65.2K |
2018 Q3
32 quarters
|
|
4669
PUT
Hasbro
HAS
$16.9B
| $193K | ﹤0.01% |
2,200
-9,900
| -82% | -$884K |
2014 Q4
47 quarters
|
|
4670
Remitly
RELY
$4.83B
| $193K | ﹤0.01% |
9,031
+2,183
| +32% | +$52.2K |
2026 Q1
2 quarters
|
|
4671
CALL
Mission Produce
AVO
$1.04B
| $193K | ﹤0.01% |
14,700
-2,200
| -13% | -$28.4K |
2021 Q4
19 quarters
|
|
4672
Green Brick Partners
GRBK
$2.59B
| $193K | ﹤0.01% |
+2,912
| New | +$207K |
2026 Q3
0 quarters
|
|
|
MBGL
4673
PUT
Mobility Global Inc
MBGL
$7.45B
| $192K | ﹤0.01% |
+11,200
| New | +$225K |
2026 Q3
0 quarters
|
|
4674
PUT
PagerDuty
PD
$1.25B
| $192K | ﹤0.01% |
12,700
-29,900
| -70% | -$363K |
2019 Q2
29 quarters
|
|
4675
PUT
CubeSmart
CUBE
$10B
| $192K | ﹤0.01% |
5,100
-2,900
| -36% | -$117K |
2019 Q3
28 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.