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 | |
|---|---|---|---|---|---|---|---|
751
PUT
NRG Energy
NRG
$20.5B
| $10.3M | 0.01% |
108,000
-7,200
| -6% | -$868K |
2021 Q2
21 quarters
|
|
752
PUT
Figma
FIG
$10.2B
| $10.3M | 0.01% |
491,100
+46,400
| +10% | +$1.11M |
2025 Q3
4 quarters
|
|
753
PUT
Lyft
LYFT
$6.53B
| $10.3M | 0.01% |
687,500
+115,100
| +20% | +$1.84M |
2021 Q1
22 quarters
|
|
754
CALL
Tapestry
TPR
$26.2B
| $10.3M | 0.01% |
89,600
+13,600
| +18% | +$1.82M |
2021 Q2
21 quarters
|
|
755
PUT
Roblox
RBLX
$37.7B
| $10.2M | 0.01% |
239,700
+42,500
| +22% | +$1.93M |
2021 Q1
22 quarters
|
|
756
Bank of America
BAC
$350B
| $10.1M | 0.01% |
+186,454
| New | +$11.4M |
2026 Q3
0 quarters
|
|
757
CALL
Honeywell
HON
$72.1B
| $10.1M | 0.01% |
130,100
-82,700
| -39% | -$18.5M |
2021 Q2
21 quarters
|
|
758
CALL
CarMax
KMX
$7.65B
| $10.1M | 0.01% |
183,900
+12,100
| +7% | +$705K |
2021 Q2
21 quarters
|
|
759
CALL
Grayscale Bitcoin Trust
GBTC
$11.2B
| $10.1M | 0.01% |
156,800
+34,600
| +28% | +$1.91M |
2024 Q4
7 quarters
|
|
760
CALL
Jabil
JBL
$26.7B
| $10.1M | 0.01% |
35,100
+3,800
| +12% | +$1.21M |
2015 Q2
45 quarters
|
|
761
PUT
Wynn Resorts
WYNN
$8.79B
| $10.1M | 0.01% |
126,700
+40,000
| +46% | +$3.77M |
2014 Q4
47 quarters
|
|
762
PUT
British American Tobacco
BTI
$131B
| $10M | 0.01% |
184,700
-2,600
| -1% | -$151K |
2016 Q1
42 quarters
|
|
763
CALL
Domino's
DPZ
$10.8B
| $10M | 0.01% |
33,500
+15,300
| +84% | +$5.02M |
2021 Q2
21 quarters
|
|
764
CALL
Capri Holdings
CPRI
$2.16B
| $10M | 0.01% |
710,100
+550,100
| +344% | +$8.4M |
2014 Q4
47 quarters
|
|
765
CALL
Ulta Beauty
ULTA
$28.2B
| $10M | 0.01% |
18,300
-12,900
| -41% | -$6.68M |
2021 Q2
21 quarters
|
|
766
CALL
e.l.f. Beauty
ELF
$7.01B
| $10M | 0.01% |
98,900
+4,700
| +5% | +$430K |
2017 Q2
37 quarters
|
|
767
CALL
Webull Corp
BULL
$2.73B
| $10M | 0.01% |
1,428,500
-1,071,100
| -43% | -$8.57M |
2025 Q2
5 quarters
|
|
768
CALL
Infleqtion Inc
INFQ
$2.12B
| $9.9M | 0.01% |
738,300
+427,700
| +138% | +$5.16M |
2026 Q1
2 quarters
|
|
769
CALL
American Electric Power
AEP
$70.4B
| $9.9M | 0.01% |
83,600
+5,800
| +7% | +$734K |
2015 Q1
46 quarters
|
|
770
CALL
Stryker
SYK
$121B
| $9.9M | 0.01% |
36,000
+13,100
| +57% | +$4.13M |
2014 Q4
47 quarters
|
|
771
PUT
Ambarella
AMBA
$2.76B
| $9.9M | 0.01% |
142,600
+122,400
| +606% | +$8.86M |
2014 Q4
47 quarters
|
|
772
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$678M
| $9.9M | 0.01% |
170,800
+35,400
| +26% | +$656K |
2021 Q2
21 quarters
|
|
|
QLTB
773
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $9.8M | 0.01% |
31,400
-144,100
| -82% | -$45.2M |
2019 Q4
27 quarters
|
|
774
CALL
SoundHound AI
SOUN
$1.91B
| $9.8M | 0.01% |
1,633,000
-273,200
| -14% | -$1.8M |
2022 Q2
17 quarters
|
|
775
CALL
Ondas Inc
ONDS
$3.34B
| $9.8M | 0.01% |
1,337,700
-568,000
| -30% | -$4.47M |
2024 Q3
8 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.