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 | |
|---|---|---|---|---|---|---|---|
1276
CALL
Valaris
VAL
$5.6B
| $4.4M | ﹤0.01% |
56,100
-1,400
| -2% | -$114K |
2022 Q1
18 quarters
|
|
1277
CALL
American Tower
AMT
$88.2B
| $4.4M | ﹤0.01% |
26,900
+19,200
| +249% | +$3.3M |
2014 Q4
47 quarters
|
|
1278
PUT
AngloGold Ashanti
AU
$46.5B
| $4.4M | ﹤0.01% |
46,800
+6,200
| +15% | +$589K |
2021 Q2
21 quarters
|
|
1279
PUT
Innodata
INOD
$1.31B
| $4.39M | ﹤0.01% |
66,800
-13,000
| -16% | -$807K |
2023 Q1
14 quarters
|
|
1280
CALL
Targa Resources
TRGP
$62.6B
| $4.38M | ﹤0.01% |
16,200
+2,600
| +19% | +$728K |
2014 Q4
47 quarters
|
|
1281
PUT
DHT Holdings
DHT
$3.48B
| $4.37M | ﹤0.01% |
193,500
+46,200
| +31% | +$901K |
2016 Q1
42 quarters
|
|
1282
CALL
Builders FirstSource
BLDR
$6.71B
| $4.36M | ﹤0.01% |
76,400
+30,400
| +66% | +$2.09M |
2016 Q1
42 quarters
|
|
1283
CALL
Sunrun
RUN
$2.19B
| $4.35M | ﹤0.01% |
559,700
-179,400
| -24% | -$1.77M |
2021 Q1
22 quarters
|
|
1284
CALL
CoStar Group
CSGP
$12.2B
| $4.34M | ﹤0.01% |
158,400
+66,300
| +72% | +$1.99M |
2021 Q2
21 quarters
|
|
1285
CALL
BorgWarner
BWA
$10.3B
| $4.33M | ﹤0.01% |
72,100
-39,500
| -35% | -$2.55M |
2015 Q3
44 quarters
|
|
1286
CALL
Realty Income
O
$56.7B
| $4.33M | ﹤0.01% |
79,800
-18,900
| -19% | -$1.17M |
2014 Q4
47 quarters
|
|
1287
PUT
Cenovus Energy
CVE
$51.3B
| $4.32M | ﹤0.01% |
139,100
+75,700
| +119% | +$2.28M |
2021 Q2
21 quarters
|
|
1288
CALL
Ero Copper
ERO
$3.23B
| $4.3M | ﹤0.01% |
117,300
-85,100
| -42% | -$2.73M |
2023 Q4
11 quarters
|
|
1289
CALL
KB Home
KBH
$3.04B
| $4.3M | ﹤0.01% |
92,500
-8,100
| -8% | -$438K |
2014 Q4
47 quarters
|
|
1290
PUT
Grab
GRAB
$13.4B
| $4.3M | ﹤0.01% |
1,382,000
+702,900
| +104% | +$2.43M |
2021 Q4
19 quarters
|
|
1291
CALL
DexCom
DXCM
$30B
| $4.29M | ﹤0.01% |
49,700
-8,700
| -15% | -$724K |
2015 Q2
45 quarters
|
|
1292
PUT
Medtronic
MDT
$130B
| $4.29M | ﹤0.01% |
49,700
-64,400
| -56% | -$5.68M |
2014 Q4
47 quarters
|
|
1293
CALL
Guardant Health
GH
$20.9B
| $4.28M | ﹤0.01% |
24,000
+9,900
| +70% | +$1.62M |
2019 Q1
30 quarters
|
|
1294
CALL
Ally Financial
ALLY
$11.5B
| $4.28M | ﹤0.01% |
113,700
+54,000
| +90% | +$2.32M |
2016 Q1
42 quarters
|
|
1295
First Majestic Silver
AG
$7.28B
| $4.28M | ﹤0.01% |
241,766
+11,913
| +5% | +$219K |
2021 Q3
20 quarters
|
|
1296
CALL
Campbell Soup
CPB
$6.65B
| $4.26M | ﹤0.01% |
215,000
-5,400
| -2% | -$120K |
2014 Q4
47 quarters
|
|
1297
CALL
Brighthouse Financial
BHF
$2.61B
| $4.26M | ﹤0.01% |
85,400
+30,500
| +56% | +$1.76M |
2019 Q1
30 quarters
|
|
1298
PUT
Volatility Premium Plus ETF
ZVOL
$22.3M
| $4.26M | ﹤0.01% |
212,000
-4,000
| -2% | -$31.8K |
2024 Q2
9 quarters
|
|
1299
PUT
Abercrombie & Fitch
ANF
$6.45B
| $4.26M | ﹤0.01% |
31,600
-39,200
| -55% | -$4.57M |
2015 Q1
46 quarters
|
|
1300
PUT
CDW
CDW
$21.6B
| $4.25M | ﹤0.01% |
33,200
+25,900
| +355% | +$3.65M |
2026 Q1
2 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.