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 | |
|---|---|---|---|---|---|---|---|
1876
CALL
Canadian Solar
CSIQ
$691M
| $2.23M | ﹤0.01% |
193,600
-31,800
| -14% | -$444K |
2021 Q2
21 quarters
|
|
1877
CALL
Hycroft Mining Holding Corp
HYMC
$1.74B
| $2.23M | ﹤0.01% |
117,000
+38,900
| +50% | +$876K |
2021 Q1
22 quarters
|
|
1878
PUT
Alcon
ALC
$35B
| $2.23M | ﹤0.01% |
34,400
+18,800
| +121% | +$1.3M |
2019 Q2
29 quarters
|
|
1879
Alaska Air
ALK
$4.63B
| $2.23M | ﹤0.01% |
57,547
-12,344
| -18% | -$550K |
2026 Q1
2 quarters
|
|
1880
CALL
Enovix
ENVX
$555M
| $2.23M | ﹤0.01% |
767,600
+436,300
| +132% | +$1.71M |
2021 Q4
19 quarters
|
|
1881
PUT
Regions Financial
RF
$24.3B
| $2.23M | ﹤0.01% |
82,800
+51,000
| +160% | +$1.54M |
2015 Q3
44 quarters
|
|
1882
American Express
AXP
$217B
| $2.22M | ﹤0.01% |
+7,314
| New | +$2.44M |
2026 Q3
0 quarters
|
|
1883
CALL
Corcept Therapeutics
CORT
$8.06B
| $2.22M | ﹤0.01% |
19,300
-7,100
| -27% | -$764K |
2016 Q3
40 quarters
|
|
1884
CALL
Harmonic Inc
HLIT
$1.11B
| $2.22M | ﹤0.01% |
210,500
+72,000
| +52% | +$872K |
2026 Q1
2 quarters
|
|
1885
Sprott Uranium Miners ETF
URNM
$1.74B
| $2.22M | ﹤0.01% |
46,821
+46,487
| +13,918% | +$2.45M |
2025 Q4
3 quarters
|
|
1886
PUT
Labcorp
LH
$30.2B
| $2.22M | ﹤0.01% |
7,200
-2,800
| -28% | -$868K |
2025 Q4
3 quarters
|
|
1887
PUT
Ross Stores
ROST
$77.1B
| $2.22M | ﹤0.01% |
9,500
-48,100
| -84% | -$11.3M |
2014 Q4
47 quarters
|
|
1888
PUT
Cracker Barrel
CBRL
$1.48B
| $2.22M | ﹤0.01% |
42,100
+17,600
| +72% | +$939K |
2026 Q1
2 quarters
|
|
1889
CALL
Exelixis
EXEL
$17.3B
| $2.21M | ﹤0.01% |
37,900
+28,400
| +299% | +$1.58M |
2021 Q2
21 quarters
|
|
1890
PUT
American Conservative Values ETF
ACVF
$154M
| $2.21M | ﹤0.01% |
102,000
-136,300
| -57% | -$7.46M |
2023 Q4
11 quarters
|
|
1891
PUT
Dutch Bros
BROS
$4.83B
| $2.21M | ﹤0.01% |
57,300
+26,100
| +84% | +$1.41M |
2021 Q4
19 quarters
|
|
1892
TripAdvisor
TRIP
$880M
| $2.2M | ﹤0.01% |
263,386
+168,562
| +178% | +$1.91M |
2026 Q2
1 quarter
|
|
1893
PUT
O'Reilly Automotive
ORLY
$72.6B
| $2.2M | ﹤0.01% |
25,800
-6,400
| -20% | -$563K |
2014 Q4
47 quarters
|
|
1894
PUT
Cardinal Health
CAH
$64.1B
| $2.2M | ﹤0.01% |
9,900
-300
| -3% | -$69.8K |
2021 Q2
21 quarters
|
|
1895
PUT
Howard Hughes
HHH
$5.01B
| $2.2M | ﹤0.01% |
29,900
+20,200
| +208% | +$1.35M |
2018 Q2
33 quarters
|
|
1896
CALL
Bausch Health
BHC
$3.13B
| $2.2M | ﹤0.01% |
377,500
+88,200
| +30% | +$509K |
2021 Q2
21 quarters
|
|
|
1897
CALL
Regions Financial
RF
$24.3B
| $2.2M | ﹤0.01% |
81,800
-134,900
| -62% | -$4.09M |
2015 Q1
46 quarters
|
|
1898
Lyft
LYFT
$6.53B
| $2.2M | ﹤0.01% |
146,478
+43,359
| +42% | +$694K |
2026 Q2
1 quarter
|
|
1899
PUT
Critical Metals Corp
CRML
$1.09B
| $2.2M | ﹤0.01% |
302,800
-48,700
| -14% | -$346K |
2025 Q3
4 quarters
|
|
1900
CALL
Stellantis
STLA
$11.9B
| $2.2M | ﹤0.01% |
504,100
+157,800
| +46% | +$849K |
2021 Q1
22 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.