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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 | |
|---|---|---|---|---|---|---|---|
2676
PUT
Blackstone Mortgage Trust
BXMT
$1.83B
| $1.04M | ﹤0.01% |
91,000
+9,100
| +11% | +$134K |
2021 Q2
21 quarters
|
|
2677
Hecla Mining
HL
$9.49B
| $1.04M | ﹤0.01% |
+61,181
| New | +$1.08M |
2026 Q3
0 quarters
|
|
2678
Allstate
ALL
$64.9B
| $1.04M | ﹤0.01% |
4,693
+4,132
| +737% | +$1.05M |
2026 Q2
1 quarter
|
|
2679
CALL
EPAM Systems
EPAM
$8.31B
| $1.04M | ﹤0.01% |
9,600
+6,400
| +200% | +$661K |
2015 Q2
45 quarters
|
|
2680
PUT
DELISTED
Churchill Capital Corp XI
CCXI
| $1.04M | ﹤0.01% |
+89,400
| New | +$1.29M |
2026 Q3
0 quarters
|
|
2681
PUT
Travere Therapeutics
TVTX
$5B
| $1.04M | ﹤0.01% |
17,600
-1,700
| -9% | -$104K |
2022 Q4
15 quarters
|
|
2682
PUT
Academy Sports + Outdoors
ASO
$4.27B
| $1.03M | ﹤0.01% |
21,500
-3,500
| -14% | -$167K |
2026 Q1
2 quarters
|
|
2683
PUT
Celcuity
CELC
$3.15B
| $1.03M | ﹤0.01% |
13,000
-800
| -6% | -$72.8K |
2025 Q2
5 quarters
|
|
2684
PUT
Eversource Energy
ES
$26.6B
| $1.03M | ﹤0.01% |
16,100
+10,200
| +173% | +$726K |
2018 Q2
33 quarters
|
|
2685
PUT
Replimune Group
REPL
$2.06B
| $1.03M | ﹤0.01% |
78,000
-268,000
| -77% | -$3.39M |
2025 Q1
6 quarters
|
|
2686
CALL
Encompass Health
EHC
$14B
| $1.03M | ﹤0.01% |
8,500
+5,600
| +193% | +$660K |
2018 Q3
32 quarters
|
|
2687
Stagwell
STGW
$2.82B
| $1.03M | ﹤0.01% |
126,831
+56,780
| +81% | +$474K |
2025 Q3
4 quarters
|
|
2688
CALL
NOV
NOV
$6.42B
| $1.03M | ﹤0.01% |
55,100
-10,800
| -16% | -$217K |
2014 Q4
47 quarters
|
|
2689
DaVita
DVA
$11.5B
| $1.03M | ﹤0.01% |
5,899
-9,776
| -62% | -$1.96M |
2026 Q1
2 quarters
|
|
2690
Solana ETF
SOLZ
$94.6M
| $1.03M | ﹤0.01% |
88,325
+58,700
| +198% | +$525K |
2026 Q1
2 quarters
|
|
2691
2x Bitcoin ETF
BITX
$962M
| $1.03M | ﹤0.01% |
52,419
+33,357
| +175% | +$496K |
2026 Q1
2 quarters
|
|
2692
CALL
Hasbro
HAS
$17.3B
| $1.03M | ﹤0.01% |
11,700
-25,000
| -68% | -$2.23M |
2014 Q4
47 quarters
|
|
2693
PUT
Motorola Solutions
MSI
$88.5B
| $1.03M | ﹤0.01% |
2,300
+1,300
| +130% | +$585K |
2014 Q4
47 quarters
|
|
|
QLTB
2694
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.02M | ﹤0.01% |
4,300
-23,800
| -85% | -$5.67M |
2018 Q4
31 quarters
|
|
2695
Corebridge Financial
CRBG
$15.8B
| $1.02M | ﹤0.01% |
+30,909
| New | +$1.01M |
2026 Q3
0 quarters
|
|
2696
CALL
Concrete Pumping Holdings
BBCP
$516M
| $1.02M | ﹤0.01% |
105,600
-200
| -0.2% | -$2K |
2026 Q2
1 quarter
|
|
2697
PUT
Northern Oil and Gas
NOG
$2.58B
| $1.02M | ﹤0.01% |
44,700
-1,200
| -3% | -$27.7K |
2021 Q2
21 quarters
|
|
2698
PUT
Western Union
WU
$2.1B
| $1.02M | ﹤0.01% |
173,300
+120,800
| +230% | +$881K |
2016 Q1
42 quarters
|
|
2699
PUT
Sempra
SRE
$51.2B
| $1.02M | ﹤0.01% |
13,100
+10,600
| +424% | +$917K |
2017 Q2
37 quarters
|
|
2700
PUT
W.P. Carey
WPC
$14.9B
| $1.02M | ﹤0.01% |
15,800
+9,300
| +143% | +$660K |
2018 Q1
34 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.