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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 | |
|---|---|---|---|---|---|---|---|
801
CALL
United States Copper Index Fund
CPER
$706M
| $9.22M | 0.01% |
231,700
+2,900
| +1% | +$114K |
2026 Q1
2 quarters
|
|
802
CALL
Wolfspeed
WOLF
$1.48B
| $9.21M | 0.01% |
327,300
-117,000
| -26% | -$3.36M |
2014 Q4
47 quarters
|
|
803
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$907M
| $9.2M | 0.01% |
150,200
+25,600
| +21% | +$1.21M |
2026 Q1
2 quarters
|
|
804
PUT
Humana
HUM
$53.6B
| $9.2M | 0.01% |
24,100
+3,900
| +19% | +$1.52M |
2014 Q4
47 quarters
|
|
805
PUT
Ondas Inc
ONDS
$3.34B
| $9.2M | 0.01% |
1,254,500
+333,300
| +36% | +$2.62M |
2024 Q4
7 quarters
|
|
806
CALL
Hut 8
HUT
$7.33B
| $9.19M | 0.01% |
106,700
-10,000
| -9% | -$947K |
2021 Q2
21 quarters
|
|
807
PUT
Futu Holdings
FUTU
$13.7B
| $9.16M | 0.01% |
82,900
-117,200
| -59% | -$12.7M |
2020 Q3
24 quarters
|
|
808
UnitedHealth
UNH
$361B
| $9.16M | 0.01% |
24,956
-40,923
| -62% | -$16.5M |
2024 Q4
7 quarters
|
|
809
Uber
UBER
$144B
| $9.16M | 0.01% |
+133,693
| New | +$9.8M |
2026 Q3
0 quarters
|
|
810
CALL
Twilio
TWLO
$34B
| $9.15M | 0.01% |
31,300
-21,000
| -40% | -$4.78M |
2016 Q3
40 quarters
|
|
811
CALL
Diageo
DEO
$55.8B
| $9.1M | ﹤0.01% |
106,300
+5,400
| +5% | +$475K |
2014 Q4
47 quarters
|
|
812
PUT
Vanguard Consumer Discretionary ETF
VCR
$6.21B
| $9.09M | ﹤0.01% |
70,500
+12,700
| +22% | +$4.92M |
2017 Q1
38 quarters
|
|
813
CALL
GFL Environmental
GFL
$18.9B
| $9.09M | ﹤0.01% |
217,300
+214,400
| +7,393% | +$8.81M |
2020 Q2
25 quarters
|
|
814
CALL
AB InBev
BUD
$166B
| $9.08M | ﹤0.01% |
123,600
+10,200
| +9% | +$816K |
2020 Q3
24 quarters
|
|
815
PUT
HSBC
HSBC
$308B
| $9.08M | ﹤0.01% |
91,400
+18,700
| +26% | +$1.91M |
2014 Q4
47 quarters
|
|
816
CALL
Hyperliquid Strategies Inc
PURR
$1.81B
| $9.07M | ﹤0.01% |
739,500
-295,300
| -29% | -$2.76M |
2026 Q1
2 quarters
|
|
817
CALL
O'Reilly Automotive
ORLY
$72.6B
| $9.05M | ﹤0.01% |
106,000
+6,200
| +6% | +$546K |
2014 Q4
47 quarters
|
|
818
PUT
American Tower
AMT
$88.2B
| $9.04M | ﹤0.01% |
55,200
+13,200
| +31% | +$2.27M |
2014 Q4
47 quarters
|
|
819
CALL
Vanguard Dividend Appreciation ETF
VIG
$118B
| $9.03M | ﹤0.01% |
38,700
+3,000
| +8% | +$721K |
2016 Q1
42 quarters
|
|
820
CALL
CAVA Group
CAVA
$6.99B
| $9.02M | ﹤0.01% |
166,800
+42,400
| +34% | +$2.7M |
2023 Q2
13 quarters
|
|
821
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$717M
| $8.98M | ﹤0.01% |
133,500
-18,600
| -12% | -$1.04M |
2016 Q2
41 quarters
|
|
822
CALL
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$5.11B
| $8.96M | ﹤0.01% |
125,500
-323,100
| -72% | -$22M |
2024 Q1
10 quarters
|
|
823
Charles River Laboratories
CRL
$16.4B
| $8.96M | ﹤0.01% |
30,359
+11,163
| +58% | +$2.94M |
2026 Q2
1 quarter
|
|
824
PUT
NetApp
NTAP
$36B
| $8.95M | ﹤0.01% |
42,600
+11,600
| +37% | +$2.14M |
2021 Q2
21 quarters
|
|
825
PUT
Cintas
CTAS
$90.2B
| $8.93M | ﹤0.01% |
45,800
+300
| +0.7% | +$59.7K |
2017 Q4
35 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.