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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 | |
|---|---|---|---|---|---|---|---|
2551
CALL
International Paper
IP
$18.4B
| $1.18M | ﹤0.01% |
35,600
-18,100
| -34% | -$693K |
2014 Q4
47 quarters
|
|
2552
PUT
Burford Capital
BUR
$802M
| $1.18M | ﹤0.01% |
301,200
+161,900
| +116% | +$679K |
2021 Q1
22 quarters
|
|
2553
CALL
John Wiley & Sons Class A
WLY
$2.6B
| $1.18M | ﹤0.01% |
+24,700
| New | +$1.25M |
2026 Q3
0 quarters
|
|
2554
PUT
Vermilion Energy
VET
$1.61B
| $1.18M | ﹤0.01% |
103,500
+98,700
| +2,056% | +$1.13M |
2017 Q3
36 quarters
|
|
2555
CALL
C4 Therapeutics
CCCC
$380M
| $1.18M | ﹤0.01% |
353,000
+322,900
| +1,073% | +$1.2M |
2021 Q4
19 quarters
|
|
2556
American Eagle Outfitters
AEO
$3.61B
| $1.17M | ﹤0.01% |
66,076
+14,726
| +29% | +$247K |
2026 Q1
2 quarters
|
|
2557
Clear Secure
YOU
$5.52B
| $1.17M | ﹤0.01% |
28,002
+17,865
| +176% | +$857K |
2026 Q2
1 quarter
|
|
2558
PUT
nLIGHT
LASR
$2.59B
| $1.17M | ﹤0.01% |
30,100
+1,800
| +6% | +$96.8K |
2025 Q2
5 quarters
|
|
2559
CALL
AmpliTech
AMPG
$76.8M
| $1.17M | ﹤0.01% |
373,300
+105,500
| +39% | +$490K |
2025 Q4
3 quarters
|
|
2560
State Street SPDR S&P Retail ETF
XRT
$651M
| $1.17M | ﹤0.01% |
+14,267
| New | +$1.24M |
2026 Q3
0 quarters
|
|
2561
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$415M
| $1.17M | ﹤0.01% |
20,100
-1,800
| -8% | -$104K |
2026 Q1
2 quarters
|
|
2562
Honda
HMC
$43.3B
| $1.17M | ﹤0.01% |
37,034
+25,427
| +219% | +$782K |
2025 Q4
3 quarters
|
|
|
2563
PUT
John Wiley & Sons Class A
WLY
$2.6B
| $1.17M | ﹤0.01% |
+24,500
| New | +$1.24M |
2026 Q3
0 quarters
|
|
2564
CALL
Wingstop
WING
$4.51B
| $1.17M | ﹤0.01% |
11,100
-100
| -0.9% | -$12.4K |
2021 Q2
21 quarters
|
|
2565
PUT
Ingredion
INGR
$5.78B
| $1.17M | ﹤0.01% |
12,200
+9,800
| +408% | +$991K |
2020 Q1
26 quarters
|
|
2566
PUT
Bank OZK
OZK
$5.44B
| $1.17M | ﹤0.01% |
25,400
+6,400
| +34% | +$319K |
2016 Q1
42 quarters
|
|
2567
Airbnb
ABNB
$106B
| $1.17M | ﹤0.01% |
7,259
-33,570
| -82% | -$5.5M |
2026 Q2
1 quarter
|
|
2568
PUT
Velocity Financial
VEL
$644M
| $1.16M | ﹤0.01% |
77,400
+75,700
| +4,453% | +$1.32M |
2026 Q1
2 quarters
|
|
2569
CALL
Papa John's
PZZA
$632M
| $1.16M | ﹤0.01% |
58,900
+10,300
| +21% | +$270K |
2017 Q4
35 quarters
|
|
2570
Vanguard Short-Term Corporate Bond ETF
VCSH
$45.6B
| $1.16M | ﹤0.01% |
+15,020
| New | +$1.18M |
2026 Q3
0 quarters
|
|
2571
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.26B
| $1.16M | ﹤0.01% |
17,229
-4,040
| -19% | -$281K |
2026 Q2
1 quarter
|
|
2572
CALL
Cracker Barrel
CBRL
$1.48B
| $1.15M | ﹤0.01% |
21,900
+9,600
| +78% | +$512K |
2026 Q1
2 quarters
|
|
2573
CALL
TKO Group
TKO
$14.5B
| $1.15M | ﹤0.01% |
6,400
-3,900
| -38% | -$734K |
2023 Q3
12 quarters
|
|
|
2574
PUT
TKO Group
TKO
$14.5B
| $1.15M | ﹤0.01% |
6,400
+3,900
| +156% | +$734K |
2023 Q3
12 quarters
|
|
2575
Simon Property Group
SPG
$75.7B
| $1.15M | ﹤0.01% |
5,721
-12,956
| -69% | -$2.82M |
2024 Q4
7 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.