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 | |
|---|---|---|---|---|---|---|---|
3676
CALL
Weatherford International
WFRD
$6.13B
| $456K | ﹤0.01% |
5,800
-5,700
| -50% | -$497K |
2021 Q2
21 quarters
|
|
|
JMKE
3677
CALL
Jersey Mike's Subs
JMKE
$6.25B
| $456K | ﹤0.01% |
+27,100
| New | +$574K |
2026 Q3
0 quarters
|
|
3678
CALL
Rocket Pharmaceuticals
RCKT
$251M
| $453K | ﹤0.01% |
172,400
+29,300
| +20% | +$102K |
2020 Q4
23 quarters
|
|
3679
CALL
Texas Roadhouse
TXRH
$12.2B
| $453K | ﹤0.01% |
2,900
+2,400
| +480% | +$458K |
2018 Q2
33 quarters
|
|
3680
CALL
Grocery Outlet
GO
$1.29B
| $453K | ﹤0.01% |
40,300
+34,200
| +561% | +$365K |
2019 Q3
28 quarters
|
|
3681
Enovis
ENOV
$1.63B
| $453K | ﹤0.01% |
24,806
-26,267
| -51% | -$625K |
2025 Q3
4 quarters
|
|
3682
CALL
Ellington Financial
EFC
$1.42B
| $453K | ﹤0.01% |
38,300
-1,300
| -3% | -$17.2K |
2020 Q1
26 quarters
|
|
3683
CALL
Crexendo
CXDO
$164M
| $453K | ﹤0.01% |
77,000
-46,500
| -38% | -$308K |
2023 Q3
12 quarters
|
|
3684
CALL
Vertex
VERX
$2.91B
| $452K | ﹤0.01% |
38,400
+600
| +2% | +$7.6K |
2025 Q1
6 quarters
|
|
3685
PUT
Stride
LRN
$3.19B
| $452K | ﹤0.01% |
5,800
+5,100
| +729% | +$430K |
2019 Q1
30 quarters
|
|
3686
PUT
Lattice Semiconductor
LSCC
$15.7B
| $452K | ﹤0.01% |
3,600
-30,600
| -89% | -$3.79M |
2018 Q2
33 quarters
|
|
3687
BioCryst Pharmaceuticals
BCRX
$1.94B
| $452K | ﹤0.01% |
54,273
+17,479
| +48% | +$165K |
2026 Q1
2 quarters
|
|
3688
CALL
High Tide
HITI
$221M
| $452K | ﹤0.01% |
165,600
-1,200
| -0.7% | -$2.88K |
2023 Q3
12 quarters
|
|
3689
CALL
Melco Resorts & Entertainment
MLCO
$1.52B
| $452K | ﹤0.01% |
100,900
-2,500
| -2% | -$13.1K |
2026 Q1
2 quarters
|
|
3690
PUT
Foghorn Therapeutics
FHTX
$120M
| $452K | ﹤0.01% |
+126,500
| New | +$666K |
2026 Q3
0 quarters
|
|
3691
PUT
BNB Standard Corporation Warrant
BNCWW
$14.8K
| $451K | ﹤0.01% |
76,600
+76,100
| +15,220% | +$1.16K |
2025 Q3
4 quarters
|
|
3692
PUT
BlackLine
BL
$1.67B
| $451K | ﹤0.01% |
17,000
+200
| +1% | +$6K |
2025 Q1
6 quarters
|
|
3693
CALL
Unifirst Corp
UNF
$4.22B
| $451K | ﹤0.01% |
1,800
+1,000
| +125% | +$280K |
2026 Q1
2 quarters
|
|
3694
PUT
Carter's
CRI
$1.25B
| $451K | ﹤0.01% |
14,400
+11,400
| +380% | +$408K |
2017 Q3
36 quarters
|
|
3695
CALL
Upexi
UPXI
$54.4M
| $450K | ﹤0.01% |
395,100
-189,800
| -32% | -$180K |
2025 Q2
5 quarters
|
|
3696
Neighborhood Intelligence Inc
NXH
$135M
| $450K | ﹤0.01% |
156,135
+79,077
| +103% | +$347K |
2026 Q1
2 quarters
|
|
3697
PUT
NextDecade
NEXT
$1.72B
| $450K | ﹤0.01% |
70,900
-153,200
| -68% | -$1.1M |
2022 Q3
16 quarters
|
|
3698
CALL
NiSource
NI
$22.1B
| $448K | ﹤0.01% |
11,500
-45,000
| -80% | -$1.93M |
2018 Q2
33 quarters
|
|
3699
PUT
Ashland
ASH
$3.41B
| $448K | ﹤0.01% |
6,600
-14,100
| -68% | -$995K |
2024 Q4
7 quarters
|
|
3700
CALL
Cedar Fair
FUN
$1.18B
| $448K | ﹤0.01% |
41,800
+26,800
| +179% | +$431K |
2026 Q1
2 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.