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 | |
|---|---|---|---|---|---|---|---|
2251
PUT
Verisk Analytics
VRSK
$26.4B
| $1.56M | ﹤0.01% |
9,300
+4,400
| +90% | +$821K |
2025 Q4
3 quarters
|
|
2252
CALL
ProShares UltraShort Health Care
RXD
$2.72M
| $1.56M | ﹤0.01% |
37,500
-14,800
| -28% | -$228K |
2015 Q1
46 quarters
|
|
2253
CALL
Medpace
MEDP
$18.6B
| $1.56M | ﹤0.01% |
2,500
+1,700
| +213% | +$996K |
2018 Q2
33 quarters
|
|
2254
CALL
Bullish
BLSH
$3.57B
| $1.56M | ﹤0.01% |
44,700
+11,100
| +33% | +$323K |
2025 Q3
4 quarters
|
|
2255
PUT
T-REX 2X Inverse DRAM Daily Target ETF
RAMZ
$191K
| $1.56M | ﹤0.01% |
+111,100
| New | +$1.98M |
2026 Q3
0 quarters
|
|
2256
PUT
New Era Energy & Digital Inc
NUAI
$273M
| $1.56M | ﹤0.01% |
232,000
-32,600
| -12% | -$174K |
2026 Q1
2 quarters
|
|
2257
CALL
Cognex
CGNX
$8.71B
| $1.56M | ﹤0.01% |
25,700
+4,400
| +21% | +$276K |
2015 Q4
43 quarters
|
|
2258
Uranium Energy
UEC
$3.58B
| $1.56M | ﹤0.01% |
164,778
+114,664
| +229% | +$1.22M |
2026 Q2
1 quarter
|
|
2259
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.56M | ﹤0.01% |
53,300
-4,100
| -7% | -$120K |
2015 Q2
45 quarters
|
|
2260
PUT
Pampa Energía
PAM
$3.41B
| $1.56M | ﹤0.01% |
20,000
+19,900
| +19,900% | +$1.65M |
2025 Q2
5 quarters
|
|
2261
Intuitive Machines
LUNR
$1.97B
| $1.55M | ﹤0.01% |
+108,689
| New | +$1.68M |
2026 Q3
0 quarters
|
|
2262
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $1.55M | ﹤0.01% |
10,900
+3,300
| +43% | +$530K |
2023 Q1
14 quarters
|
|
2263
MPLX
MPLX
$57.5B
| $1.55M | ﹤0.01% |
27,451
+20,589
| +300% | +$1.2M |
2026 Q2
1 quarter
|
|
2264
Ferguson
FERG
$51.2B
| $1.55M | ﹤0.01% |
+6,942
| New | +$1.61M |
2026 Q3
0 quarters
|
|
2265
CALL
International Flavors & Fragrances
IFF
$20.7B
| $1.54M | ﹤0.01% |
18,500
+10,300
| +126% | +$850K |
2026 Q1
2 quarters
|
|
2266
Direxion Daily S&P 500 Bear 1X ETF
SPDN
$294M
| $1.54M | ﹤0.01% |
182,002
+174,036
| +2,185% | +$1.49M |
2025 Q1
6 quarters
|
|
2267
CALL
Rackspace Technology
RXT
$798M
| $1.54M | ﹤0.01% |
414,300
+197,200
| +91% | +$811K |
2020 Q3
24 quarters
|
|
2268
PUT
Varonis Systems
VRNS
$5.65B
| $1.54M | ﹤0.01% |
32,500
-185,800
| -85% | -$8.33M |
2020 Q1
26 quarters
|
|
2269
PUT
Apple Hospitality REIT
APLE
$4.67B
| $1.54M | ﹤0.01% |
95,300
+2,900
| +3% | +$47K |
2018 Q1
34 quarters
|
|
2270
PUT
Onto Innovation
ONTO
$10.6B
| $1.54M | ﹤0.01% |
5,000
+1,400
| +39% | +$401K |
2023 Q3
12 quarters
|
|
2271
CALL
Becton Dickinson
BDX
$58.4B
| $1.54M | ﹤0.01% |
8,700
-1,000
| -10% | -$174K |
2015 Q1
46 quarters
|
|
2272
CALL
Infosys
INFY
$49.8B
| $1.54M | ﹤0.01% |
142,900
-57,800
| -29% | -$666K |
2014 Q4
47 quarters
|
|
2273
CALL
Saia
SAIA
$9.06B
| $1.54M | ﹤0.01% |
4,600
| – | – |
2021 Q4
19 quarters
|
|
2274
CALL
Peabody Energy
BTU
$2.06B
| $1.53M | ﹤0.01% |
62,900
-14,900
| -19% | -$375K |
2017 Q2
37 quarters
|
|
2275
PUT
KeyCorp
KEY
$22.6B
| $1.53M | ﹤0.01% |
76,400
+2,100
| +3% | +$46.7K |
2021 Q2
21 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.