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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 | |
|---|---|---|---|---|---|---|---|
1076
PUT
Keel Infrastructure Corp
KEEL
$1.28B
| $5.84M | ﹤0.01% |
1,655,000
+312,100
| +23% | +$1.2M |
2021 Q4
19 quarters
|
|
1077
CALL
Lennar Class A
LEN
$20.5B
| $5.83M | ﹤0.01% |
107,400
+18,600
| +21% | +$1.56M |
2021 Q3
20 quarters
|
|
1078
PUT
Keysight
KEYS
$52B
| $5.82M | ﹤0.01% |
16,000
+3,400
| +27% | +$1.12M |
2018 Q2
33 quarters
|
|
1079
CALL
Grayscale Bitcoin Mini Trust ETF
BTC
$3.95B
| $5.82M | ﹤0.01% |
157,600
+106,900
| +211% | +$3.36M |
2026 Q1
2 quarters
|
|
1080
CALL
Grayscale Ethereum Staking ETF Shares
ETHE
$1.57B
| $5.81M | ﹤0.01% |
271,200
+56,900
| +27% | +$993K |
2026 Q1
2 quarters
|
|
1081
CALL
Yum! Brands
YUM
$43B
| $5.79M | ﹤0.01% |
42,500
-8,900
| -17% | -$1.33M |
2021 Q1
22 quarters
|
|
1082
CALL
Bilibili
BILI
$5.58B
| $5.78M | ﹤0.01% |
384,700
-132,600
| -26% | -$2.24M |
2018 Q2
33 quarters
|
|
1083
PUT
Suncor Energy
SU
$79.4B
| $5.77M | ﹤0.01% |
85,000
-5,000
| -6% | -$325K |
2021 Q2
21 quarters
|
|
1084
PUT
Mondelez International
MDLZ
$84.4B
| $5.76M | ﹤0.01% |
99,700
-4,200
| -4% | -$258K |
2014 Q4
47 quarters
|
|
1085
PUT
Vaxcyte
PCVX
$10.9B
| $5.76M | ﹤0.01% |
101,200
-400
| -0.4% | -$23.3K |
2022 Q4
15 quarters
|
|
1086
PUT
Tradr 2X Long TTMI Daily ETF
TTMX
$75.6K
| $5.75M | ﹤0.01% |
+242,600
| New | +$2.54M |
2026 Q3
0 quarters
|
|
1087
CALL
Exelon
EXC
$47.2B
| $5.74M | ﹤0.01% |
142,100
+5,800
| +4% | +$259K |
2015 Q3
44 quarters
|
|
1088
CALL
MGM Resorts International
MGM
$8.47B
| $5.72M | ﹤0.01% |
184,100
-24,400
| -12% | -$1.04M |
2021 Q1
22 quarters
|
|
1089
Canadian Pacific Kansas City
CP
$81.5B
| $5.72M | ﹤0.01% |
67,157
+14,572
| +28% | +$1.32M |
2026 Q1
2 quarters
|
|
1090
CALL
RingCentral
RNG
$6.27B
| $5.71M | ﹤0.01% |
76,500
+60,900
| +390% | +$3.7M |
2021 Q1
22 quarters
|
|
1091
PUT
Skyworks Solutions
SWKS
$20.6B
| $5.71M | ﹤0.01% |
66,800
+21,200
| +46% | +$1.49M |
2014 Q4
47 quarters
|
|
|
TYNS
1092
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $5.71M | ﹤0.01% |
40,800
-16,400
| -29% | -$2.29M |
2014 Q4
47 quarters
|
|
1093
PUT
Frontline
FRO
$10.1B
| $5.71M | ﹤0.01% |
115,800
+400
| +0.3% | +$17K |
2015 Q4
43 quarters
|
|
1094
CALL
B2Gold
BTG
$6.82B
| $5.7M | ﹤0.01% |
1,092,900
-114,400
| -9% | -$544K |
2020 Q1
26 quarters
|
|
1095
CALL
Lemonade
LMND
$3.17B
| $5.68M | ﹤0.01% |
125,800
+28,300
| +29% | +$1.57M |
2020 Q3
24 quarters
|
|
1096
CALL
Kohl's
KSS
$2.79B
| $5.68M | ﹤0.01% |
307,500
+82,000
| +36% | +$1.48M |
2014 Q4
47 quarters
|
|
1097
CALL
Viasat
VSAT
$10.5B
| $5.66M | ﹤0.01% |
80,400
-78,800
| -49% | -$5.91M |
2021 Q2
21 quarters
|
|
1098
PUT
Coupang
CPNG
$28.7B
| $5.66M | ﹤0.01% |
407,800
+171,000
| +72% | +$2.74M |
2021 Q1
22 quarters
|
|
1099
CALL
uniQure
QURE
$1.72B
| $5.66M | ﹤0.01% |
234,100
+84,300
| +56% | +$3.66M |
2017 Q3
36 quarters
|
|
1100
CALL
Dick's Sporting Goods
DKS
$14.7B
| $5.65M | ﹤0.01% |
42,100
+38,500
| +1,069% | +$6.79M |
2014 Q4
47 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.