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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 | |
|---|---|---|---|---|---|---|---|
|
DENT
1101
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $5.65M | ﹤0.01% |
1,328,100
+536,900
| +68% | +$2.28M |
2017 Q4
35 quarters
|
|
1102
CALL
Tractor Supply
TSCO
$19.1B
| $5.64M | ﹤0.01% |
180,400
+91,200
| +102% | +$2.99M |
2014 Q4
47 quarters
|
|
1103
PUT
Intercontinental Exchange
ICE
$101B
| $5.64M | ﹤0.01% |
37,100
-200
| -0.5% | -$30.2K |
2026 Q1
2 quarters
|
|
1104
PUT
BlackBerry
BB
$5.52B
| $5.64M | ﹤0.01% |
623,400
-69,300
| -10% | -$611K |
2021 Q2
21 quarters
|
|
1105
CALL
Penumbra
PEN
$12.7B
| $5.63M | ﹤0.01% |
17,700
-2,000
| -10% | -$642K |
2026 Q1
2 quarters
|
|
1106
PUT
Enphase Energy
ENPH
$3.74B
| $5.62M | ﹤0.01% |
170,300
-41,400
| -20% | -$1.59M |
2017 Q4
35 quarters
|
|
1107
CALL
General Dynamics
GD
$99.2B
| $5.61M | ﹤0.01% |
16,900
-6,200
| -27% | -$2.3M |
2014 Q4
47 quarters
|
|
1108
Occidental Petroleum
OXY
$57.2B
| $5.61M | ﹤0.01% |
+101,358
| New | +$5.79M |
2026 Q3
0 quarters
|
|
1109
CALL
TG Therapeutics
TGTX
$10.1B
| $5.61M | ﹤0.01% |
100,500
+38,300
| +62% | +$2.07M |
2021 Q2
21 quarters
|
|
1110
CALL
Dollar General
DG
$30.3B
| $5.6M | ﹤0.01% |
46,800
-1,300
| -3% | -$160K |
2014 Q4
47 quarters
|
|
1111
PUT
AeroVironment
AVAV
$6.32B
| $5.59M | ﹤0.01% |
39,300
-26,700
| -40% | -$4.21M |
2017 Q4
35 quarters
|
|
1112
CALL
Howmet Aerospace
HWM
$89.1B
| $5.59M | ﹤0.01% |
24,700
-6,600
| -21% | -$1.74M |
2016 Q4
39 quarters
|
|
1113
CALL
Paychex
PAYX
$41.1B
| $5.58M | ﹤0.01% |
56,700
+17,700
| +45% | +$2.05M |
2014 Q4
47 quarters
|
|
1114
CALL
RUM Group Inc
RUM
$2.38B
| $5.58M | ﹤0.01% |
738,200
+495,400
| +204% | +$3.66M |
2021 Q4
19 quarters
|
|
1115
PUT
Union Pacific
UNP
$179B
| $5.58M | ﹤0.01% |
20,500
-8,000
| -28% | -$2.33M |
2021 Q2
21 quarters
|
|
1116
CALL
Baker Hughes
BKR
$49.1B
| $5.58M | ﹤0.01% |
101,600
+52,700
| +108% | +$3.14M |
2017 Q3
36 quarters
|
|
1117
CALL
Cognizant
CTSH
$28.8B
| $5.57M | ﹤0.01% |
96,900
-163,800
| -63% | -$9M |
2026 Q1
2 quarters
|
|
1118
PUT
Estee Lauder
EL
$40.7B
| $5.56M | ﹤0.01% |
59,900
-9,500
| -14% | -$865K |
2015 Q2
45 quarters
|
|
1119
PUT
PBF Energy
PBF
$8.27B
| $5.55M | ﹤0.01% |
72,100
+63,500
| +738% | +$4.3M |
2021 Q2
21 quarters
|
|
1120
CALL
Axon Enterprise
AXON
$25.7B
| $5.54M | ﹤0.01% |
13,100
+1,900
| +17% | +$1.03M |
2014 Q4
47 quarters
|
|
1121
PUT
American Electric Power
AEP
$70.4B
| $5.53M | ﹤0.01% |
46,600
+27,700
| +147% | +$3.51M |
2015 Q1
46 quarters
|
|
1122
CALL
Green Plains
GPRE
$960M
| $5.53M | ﹤0.01% |
367,100
-31,800
| -8% | -$503K |
2018 Q2
33 quarters
|
|
1123
CALL
Trane Technologies
TT
$93B
| $5.51M | ﹤0.01% |
12,200
+2,000
| +20% | +$920K |
2015 Q4
43 quarters
|
|
1124
CALL
Marriott International
MAR
$111B
| $5.51M | ﹤0.01% |
15,500
-2,000
| -11% | -$713K |
2014 Q4
47 quarters
|
|
1125
CALL
Critical Metals Corp
CRML
$1.09B
| $5.45M | ﹤0.01% |
751,100
+421,700
| +128% | +$2.99M |
2025 Q3
4 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.