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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 | |
|---|---|---|---|---|---|---|---|
826
CALL
Welltower
WELL
$181B
| $8.93M | ﹤0.01% |
38,800
-6,400
| -14% | -$1.51M |
2014 Q4
47 quarters
|
|
827
PUT
Schwab US Broad Market ETF
SCHB
$44.6B
| $8.89M | ﹤0.01% |
274,000
+161,300
| +143% | +$4.73M |
2018 Q4
31 quarters
|
|
828
PUT
Snap
SNAP
$9.22B
| $8.89M | ﹤0.01% |
1,645,400
+97,500
| +6% | +$504K |
2017 Q1
38 quarters
|
|
829
PUT
Gilead Sciences
GILD
$211B
| $8.84M | ﹤0.01% |
59,300
-27,700
| -32% | -$3.89M |
2021 Q2
21 quarters
|
|
830
PUT
Dollar General
DG
$30.3B
| $8.83M | ﹤0.01% |
73,800
+3,500
| +5% | +$432K |
2014 Q4
47 quarters
|
|
831
Johnson & Johnson
JNJ
$675B
| $8.81M | ﹤0.01% |
33,287
+19,890
| +148% | +$5.25M |
2026 Q2
1 quarter
|
|
832
PUT
Five Below
FIVE
$13.8B
| $8.8M | ﹤0.01% |
40,100
-1,400
| -3% | -$314K |
2014 Q4
47 quarters
|
|
833
PUT
Navitas Semiconductor
NVTS
$2.71B
| $8.8M | ﹤0.01% |
758,200
+319,800
| +73% | +$3.95M |
2021 Q4
19 quarters
|
|
834
CALL
MetLife
MET
$64.7B
| $8.79M | ﹤0.01% |
93,300
+63,200
| +210% | +$6.03M |
2014 Q4
47 quarters
|
|
835
CALL
British American Tobacco
BTI
$131B
| $8.77M | ﹤0.01% |
161,300
-125,900
| -44% | -$7.3M |
2015 Q1
46 quarters
|
|
836
CALL
The Kraft Heinz Company
KHC
$28.7B
| $8.74M | ﹤0.01% |
384,500
-110,900
| -22% | -$2.79M |
2015 Q3
44 quarters
|
|
837
Nebius Group N.V.
NBIS
$42.1B
| $8.74M | ﹤0.01% |
37,034
+17,231
| +87% | +$3.71M |
2026 Q1
2 quarters
|
|
838
PUT
Constellation Brands
STZ
$24.4B
| $8.73M | ﹤0.01% |
77,200
-1,900
| -2% | -$245K |
2021 Q3
20 quarters
|
|
839
CALL
Forgent Power Solutions
FPS
$6.75B
| $8.73M | ﹤0.01% |
233,100
+202,800
| +669% | +$7.47M |
2026 Q1
2 quarters
|
|
840
CALL
GitLab
GTLB
$7.88B
| $8.71M | ﹤0.01% |
184,400
-59,200
| -24% | -$2.4M |
2021 Q4
19 quarters
|
|
841
CALL
Sharplink Inc
SBET
$1.31B
| $8.67M | ﹤0.01% |
934,300
+130,100
| +16% | +$949K |
2025 Q2
5 quarters
|
|
842
PUT
DraftKings
DKNG
$9.8B
| $8.67M | ﹤0.01% |
456,100
+303,700
| +199% | +$7.33M |
2020 Q1
26 quarters
|
|
843
PUT
Ally Financial
ALLY
$11.5B
| $8.65M | ﹤0.01% |
230,000
+194,600
| +550% | +$8.37M |
2014 Q4
47 quarters
|
|
844
PUT
Cigna
CI
$79.4B
| $8.64M | ﹤0.01% |
31,800
-6,700
| -17% | -$1.89M |
2020 Q1
26 quarters
|
|
845
PUT
Tapestry
TPR
$26.2B
| $8.63M | ﹤0.01% |
75,000
+38,800
| +107% | +$5.19M |
2021 Q2
21 quarters
|
|
846
CALL
MSG Knickerbockers Corp.
MSGK
$7.78B
| $8.59M | ﹤0.01% |
21,200
+12,000
| +130% | +$4.75M |
2026 Q1
2 quarters
|
|
847
CALL
Autodesk
ADSK
$54.3B
| $8.59M | ﹤0.01% |
41,100
+8,500
| +26% | +$1.94M |
2021 Q2
21 quarters
|
|
848
PUT
Prudential Financial
PRU
$42.2B
| $8.59M | ﹤0.01% |
75,600
+15,300
| +25% | +$1.82M |
2014 Q4
47 quarters
|
|
849
CALL
Intuitive Machines
LUNR
$1.97B
| $8.56M | ﹤0.01% |
601,200
+221,900
| +59% | +$3.43M |
2024 Q1
10 quarters
|
|
850
CALL
Prologis
PLD
$124B
| $8.56M | ﹤0.01% |
65,900
+29,800
| +83% | +$4.18M |
2021 Q1
22 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.