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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 | |
|---|---|---|---|---|---|---|---|
926
PUT
Planet Labs
PL
$5.22B
| $7.37M | ﹤0.01% |
449,400
+136,900
| +44% | +$2.93M |
2021 Q4
19 quarters
|
|
927
PUT
Colgate-Palmolive
CL
$77.9B
| $7.36M | ﹤0.01% |
86,300
+42,200
| +96% | +$3.82M |
2014 Q4
47 quarters
|
|
928
PUT
United Microelectronic
UMC
$40.3B
| $7.35M | ﹤0.01% |
300,300
+101,400
| +51% | +$2.17M |
2026 Q1
2 quarters
|
|
929
PUT
Rambus
RMBS
$9.14B
| $7.31M | ﹤0.01% |
68,500
+62,300
| +1,005% | +$6.01M |
2018 Q3
32 quarters
|
|
930
PUT
Corebridge Financial
CRBG
$15.8B
| $7.3M | ﹤0.01% |
220,400
+203,800
| +1,228% | +$6.66M |
2022 Q4
15 quarters
|
|
931
CALL
VICI Properties
VICI
$27.5B
| $7.29M | ﹤0.01% |
317,500
+227,900
| +254% | +$5.87M |
2018 Q4
31 quarters
|
|
932
CALL
Fox Class B
FOX
$25.6B
| $7.28M | ﹤0.01% |
116,200
+101,300
| +680% | +$5.63M |
2019 Q2
29 quarters
|
|
933
CALL
Royal Gold
RGLD
$22.7B
| $7.27M | ﹤0.01% |
30,800
+10,700
| +53% | +$2.45M |
2014 Q4
47 quarters
|
|
934
CALL
CME Group
CME
$113B
| $7.26M | ﹤0.01% |
27,700
-11,900
| -30% | -$3.14M |
2014 Q4
47 quarters
|
|
935
CALL
HSBC
HSBC
$308B
| $7.25M | ﹤0.01% |
73,000
+17,700
| +32% | +$1.81M |
2014 Q4
47 quarters
|
|
936
CALL
Integer Holdings
ITGR
$4.31B
| $7.2M | ﹤0.01% |
57,000
+56,200
| +7,025% | +$6.51M |
2025 Q4
3 quarters
|
|
937
CALL
SK Telecom
SKM
$13.2B
| $7.2M | ﹤0.01% |
206,300
+70,200
| +52% | +$2.48M |
2025 Q1
6 quarters
|
|
938
CALL
Nextpower Inc. Common Stock
NXT
$15.1B
| $7.19M | ﹤0.01% |
92,300
+75,900
| +463% | +$7.11M |
2023 Q1
14 quarters
|
|
939
CALL
AerCap
AER
$26.9B
| $7.19M | ﹤0.01% |
50,100
-8,600
| -15% | -$1.27M |
2021 Q2
21 quarters
|
|
940
CALL
Generac Holdings
GNRC
$11.4B
| $7.18M | ﹤0.01% |
34,700
+4,300
| +14% | +$894K |
2018 Q2
33 quarters
|
|
941
PUT
Check Point Software Technologies
CHKP
$15B
| $7.17M | ﹤0.01% |
55,900
+42,300
| +311% | +$5.62M |
2026 Q1
2 quarters
|
|
942
CALL
VF Corp
VFC
$8.12B
| $7.17M | ﹤0.01% |
510,100
+64,500
| +14% | +$956K |
2014 Q4
47 quarters
|
|
943
CALL
Intercontinental Exchange
ICE
$101B
| $7.16M | ﹤0.01% |
47,100
+11,200
| +31% | +$1.69M |
2026 Q1
2 quarters
|
|
944
PUT
YPF Sociedad Anonima ADS
YPF
$14.6B
| $7.15M | ﹤0.01% |
142,700
-20,000
| -12% | -$1.02M |
2014 Q4
47 quarters
|
|
945
CALL
Figma
FIG
$10.2B
| $7.14M | ﹤0.01% |
339,900
-62,400
| -16% | -$1.49M |
2025 Q3
4 quarters
|
|
946
Chipotle Mexican Grill
CMG
$46.3B
| $7.13M | ﹤0.01% |
223,309
+141,468
| +173% | +$4.9M |
2025 Q2
5 quarters
|
|
947
CALL
JetBlue
JBLU
$1.52B
| $7.13M | ﹤0.01% |
1,684,500
+274,500
| +19% | +$1.42M |
2014 Q4
47 quarters
|
|
948
PUT
Vertex Pharmaceuticals
VRTX
$139B
| $7.11M | ﹤0.01% |
13,600
-6,600
| -33% | -$3.38M |
2021 Q1
22 quarters
|
|
|
949
CALL
Rambus
RMBS
$9.14B
| $7.09M | ﹤0.01% |
66,400
+33,200
| +100% | +$3.2M |
2014 Q4
47 quarters
|
|
950
PUT
Novanta
NOVT
$4.66B
| $7.08M | ﹤0.01% |
49,800
+7,300
| +17% | +$1.08M |
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.