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 | |
|---|---|---|---|---|---|---|---|
4276
CALL
Root
ROOT
$661M
| $272K | ﹤0.01% |
5,900
+1,200
| +26% | +$66.5K |
2020 Q4
23 quarters
|
|
4277
PUT
Unum
UNM
$12.3B
| $272K | ﹤0.01% |
3,100
+300
| +11% | +$27.2K |
2018 Q1
34 quarters
|
|
4278
CALL
Real REMAX Group Inc. Common Stock
REAX
$401M
| $272K | ﹤0.01% |
16,600
+16,560
| +41,400% | +$334K |
2024 Q4
7 quarters
|
|
4279
BCE
BCE
$20.1B
| $271K | ﹤0.01% |
+13,334
| New | +$298K |
2026 Q3
0 quarters
|
|
4280
CALL
Daqo New Energy
DQ
$743M
| $271K | ﹤0.01% |
23,700
-59,100
| -71% | -$748K |
2021 Q1
22 quarters
|
|
4281
Li Auto
LI
$11.4B
| $271K | ﹤0.01% |
+23,827
| New | +$293K |
2026 Q3
0 quarters
|
|
4282
Tradr 2X Short APLD Daily ETF
APLZ
$4.03M
| $270K | ﹤0.01% |
11,477
+11,464
| +88,185% | +$273K |
2026 Q2
1 quarter
|
|
4283
CALL
Landstar System
LSTR
$5.03B
| $270K | ﹤0.01% |
1,600
| – | – |
2026 Q1
2 quarters
|
|
4284
CALL
Burford Capital
BUR
$786M
| $270K | ﹤0.01% |
68,800
-9,300
| -12% | -$39K |
2021 Q1
22 quarters
|
|
4285
CALL
Universal Display
OLED
$4.02B
| $270K | ﹤0.01% |
3,500
+2,200
| +169% | +$181K |
2014 Q4
47 quarters
|
|
4286
GrabAGun Digital Holdings
PEW
$46M
| $269K | ﹤0.01% |
128,763
+61,464
| +91% | +$150K |
2026 Q1
2 quarters
|
|
4287
Hormel Foods
HRL
$12.2B
| $269K | ﹤0.01% |
13,487
-5,647
| -30% | -$132K |
2024 Q2
9 quarters
|
|
4288
CALL
Velocity Financial
VEL
$626M
| $269K | ﹤0.01% |
17,900
+10,000
| +127% | +$175K |
2026 Q2
1 quarter
|
|
4289
PUT
ODDITY Tech
ODD
$823M
| $269K | ﹤0.01% |
14,400
-600
| -4% | -$9.43K |
2023 Q3
12 quarters
|
|
4290
CALL
Sylvamo
SLVM
$1.54B
| $268K | ﹤0.01% |
8,200
+7,900
| +2,633% | +$294K |
2021 Q4
19 quarters
|
|
4291
Universal Technical Institute
UTI
$1.21B
| $268K | ﹤0.01% |
14,350
-1,020
| -7% | -$30.9K |
2026 Q1
2 quarters
|
|
4292
CALL
Box
BOX
$6.02B
| $268K | ﹤0.01% |
8,000
-13,900
| -63% | -$447K |
2015 Q1
46 quarters
|
|
4293
Ivanhoe Electric
IE
$1.07B
| $268K | ﹤0.01% |
26,988
-8,758
| -25% | -$87.4K |
2024 Q3
8 quarters
|
|
4294
CALL
CPS Technologies
CPSH
$77.3M
| $267K | ﹤0.01% |
71,300
-13,000
| -15% | -$54.5K |
2025 Q3
4 quarters
|
|
4295
Insight Enterprises
NSIT
$4.88B
| $266K | ﹤0.01% |
1,704
-1,126
| -40% | -$159K |
2026 Q1
2 quarters
|
|
4296
CALL
Entravision Communication
EVC
$871M
| $266K | ﹤0.01% |
36,200
-32,700
| -47% | -$314K |
2026 Q1
2 quarters
|
|
4297
CALL
Manchester United
MANU
$3.87B
| $266K | ﹤0.01% |
12,700
+5,900
| +87% | +$130K |
2018 Q1
34 quarters
|
|
4298
CALL
Capital Southwest
CSWC
$1.55B
| $266K | ﹤0.01% |
11,500
-4,000
| -26% | -$96.7K |
2021 Q1
22 quarters
|
|
4299
Encompass Health
EHC
$13.8B
| $266K | ﹤0.01% |
2,187
+1,835
| +521% | +$216K |
2026 Q1
2 quarters
|
|
4300
CALL
Factorial Energy Inc
FAC
$423M
| $266K | ﹤0.01% |
+41,900
| New | +$250K |
2026 Q3
0 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.