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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 | |
|---|---|---|---|---|---|---|---|
2001
CALL
PENN Entertainment
PENN
$2.44B
| $1.97M | ﹤0.01% |
134,300
-182,900
| -58% | -$3.43M |
2019 Q1
30 quarters
|
|
2002
CALL
PACS Group
PACS
$7.95B
| $1.97M | ﹤0.01% |
47,300
+2,800
| +6% | +$124K |
2024 Q3
8 quarters
|
|
2003
PUT
Sprouts Farmers Market
SFM
$4.66B
| $1.96M | ﹤0.01% |
29,600
+10,400
| +54% | +$813K |
2021 Q2
21 quarters
|
|
2004
PUT
Zions Bancorporation
ZION
$9.6B
| $1.96M | ﹤0.01% |
31,300
-1,600
| -5% | -$110K |
2015 Q3
44 quarters
|
|
2005
Ally Financial
ALLY
$11.5B
| $1.96M | ﹤0.01% |
+52,123
| New | +$2.24M |
2026 Q3
0 quarters
|
|
2006
CALL
Chime Financial
CHYM
$12.7B
| $1.96M | ﹤0.01% |
73,600
+4,000
| +6% | +$111K |
2025 Q2
5 quarters
|
|
2007
Franco-Nevada
FNV
$48B
| $1.96M | ﹤0.01% |
8,232
+1,975
| +32% | +$470K |
2025 Q4
3 quarters
|
|
2008
PUT
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$202M
| $1.96M | ﹤0.01% |
20,100
-700
| -3% | -$18.4K |
2023 Q4
11 quarters
|
|
2009
Tenable Holdings
TENB
$4.49B
| $1.96M | ﹤0.01% |
53,845
-24,846
| -32% | -$893K |
2026 Q2
1 quarter
|
|
2010
JPMorgan Equity Premium Income ETF
JEPI
$46.7B
| $1.96M | ﹤0.01% |
34,787
-5,297
| -13% | -$302K |
2026 Q1
2 quarters
|
|
2011
CALL
Global X S&P 500 Tail Risk ETF
XTR
$4.86M
| $1.95M | ﹤0.01% |
61,900
+16,800
| +37% | +$483K |
2022 Q2
17 quarters
|
|
2012
Symbotic
SYM
$4.82B
| $1.95M | ﹤0.01% |
46,444
-8,289
| -15% | -$350K |
2025 Q4
3 quarters
|
|
2013
CALL
Hertz
HTZ
$586M
| $1.95M | ﹤0.01% |
1,169,500
+35,800
| +3% | +$71.2K |
2021 Q4
19 quarters
|
|
2014
PUT
FuelCell Energy
FCEL
$875M
| $1.95M | ﹤0.01% |
118,900
+24,400
| +26% | +$480K |
2019 Q3
28 quarters
|
|
2015
CALL
Howard Hughes
HHH
$5.01B
| $1.95M | ﹤0.01% |
26,500
+20,400
| +334% | +$1.37M |
2023 Q2
13 quarters
|
|
2016
CALL
American Century Diversified Corporate Bond ETF
KORP
$951M
| $1.95M | ﹤0.01% |
17,500
+17,400
| +17,400% | +$797K |
2021 Q4
19 quarters
|
|
2017
PUT
Harley-Davidson
HOG
$3.43B
| $1.95M | ﹤0.01% |
79,700
-30,700
| -28% | -$811K |
2021 Q1
22 quarters
|
|
2018
Everpure Inc
P
$35.5B
| $1.95M | ﹤0.01% |
+14,882
| New | +$1.4M |
2026 Q3
0 quarters
|
|
2019
Schrodinger
SDGR
$2.36B
| $1.94M | ﹤0.01% |
+62,615
| New | +$1.23M |
2026 Q3
0 quarters
|
|
2020
PUT
Lamb Weston
LW
$7.84B
| $1.94M | ﹤0.01% |
46,500
-25,000
| -35% | -$1.24M |
2017 Q2
37 quarters
|
|
2021
PUT
SailPoint Inc
SAIL
$11.9B
| $1.94M | ﹤0.01% |
95,100
+45,200
| +91% | +$808K |
2025 Q1
6 quarters
|
|
2022
PUT
Entergy
ETR
$53.5B
| $1.94M | ﹤0.01% |
19,500
-9,400
| -33% | -$1.01M |
2014 Q4
47 quarters
|
|
2023
CALL
NNN REIT
NNN
$8.03B
| $1.94M | ﹤0.01% |
47,100
+46,700
| +11,675% | +$2.14M |
2018 Q2
33 quarters
|
|
2024
PUT
Cooper Companies
COO
$12B
| $1.93M | ﹤0.01% |
34,200
-13,300
| -28% | -$909K |
2017 Q2
37 quarters
|
|
2025
CALL
Church & Dwight Co
CHD
$26.4B
| $1.93M | ﹤0.01% |
20,500
+15,500
| +310% | +$1.52M |
2017 Q1
38 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.