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 | |
|---|---|---|---|---|---|---|---|
151
CALL
Nike
NKE
$59.2B
| $92M | 0.05% |
2,599,700
+697,400
| +37% | +$28M |
2014 Q4
47 quarters
|
|
152
PUT
Freeport-McMoran
FCX
$89.4B
| $92M | 0.05% |
1,313,800
-306,100
| -19% | -$20.8M |
2021 Q2
21 quarters
|
|
153
CALL
Caterpillar
CAT
$274B
| $90.9M | 0.05% |
112,100
+900
| +0.8% | +$763K |
2014 Q4
47 quarters
|
|
154
iShares Semiconductor ETF
SOXX
$42.1B
| $90.9M | 0.05% |
479,451
-5,145
| -1% | -$918K |
2025 Q4
3 quarters
|
|
155
CALL
Pinduoduo
PDD
$115B
| $90.6M | 0.05% |
1,162,600
-74,200
| -6% | -$6.24M |
2021 Q1
22 quarters
|
|
156
CALL
Costco
COST
$472B
| $90.3M | 0.05% |
99,200
+25,100
| +34% | +$23.4M |
2021 Q2
21 quarters
|
|
157
PUT
ServiceNow
NOW
$107B
| $88.9M | 0.05% |
663,300
-235,700
| -26% | -$29M |
2014 Q4
47 quarters
|
|
158
PUT
ExxonMobil
XOM
$672B
| $87.9M | 0.05% |
540,000
-259,700
| -32% | -$40.6M |
2021 Q2
21 quarters
|
|
159
CALL
Pfizer
PFE
$167B
| $87.8M | 0.05% |
3,078,500
+14,000
| +0.5% | +$372K |
2014 Q4
47 quarters
|
|
160
CALL
Uber
UBER
$145B
| $87.2M | 0.05% |
1,273,200
+233,800
| +22% | +$17.1M |
2021 Q1
22 quarters
|
|
161
CALL
PayPal
PYPL
$49.9B
| $84.9M | 0.05% |
1,615,500
-54,200
| -3% | -$2.98M |
2015 Q3
44 quarters
|
|
162
CALL
Nu Holdings
NU
$59.7B
| $84.3M | 0.05% |
6,660,700
+2,416,100
| +57% | +$34.3M |
2021 Q4
19 quarters
|
|
163
PUT
Chevron
CVX
$411B
| $83.6M | 0.05% |
409,600
+55,300
| +16% | +$10.9M |
2014 Q4
47 quarters
|
|
164
CALL
Western Digital
WDC
$108B
| $83.3M | 0.05% |
182,500
-19,100
| -9% | -$9.29M |
2014 Q4
47 quarters
|
|
165
CALL
IBM
IBM
$233B
| $83.1M | 0.05% |
377,900
-78,900
| -17% | -$18.7M |
2026 Q1
2 quarters
|
|
166
CALL
Energy Transfer Partners
ET
$65.7B
| $82.8M | 0.05% |
4,185,700
+798,000
| +24% | +$16.5M |
2021 Q2
21 quarters
|
|
167
PUT
Boeing
BA
$137B
| $82.1M | 0.04% |
441,100
+81,500
| +23% | +$17.5M |
2015 Q1
46 quarters
|
|
168
Oracle
ORCL
$373B
| $80.5M | 0.04% |
586,290
+18,998
| +3% | +$2.68M |
2025 Q2
5 quarters
|
|
|
169
PUT
PayPal
PYPL
$49.9B
| $79.9M | 0.04% |
1,521,400
-64,400
| -4% | -$3.55M |
2015 Q3
44 quarters
|
|
170
CALL
SoFi Technologies
SOFI
$21.7B
| $79.8M | 0.04% |
5,075,100
-39,000
| -0.8% | -$687K |
2020 Q4
23 quarters
|
|
|
171
PUT
Pfizer
PFE
$167B
| $79.7M | 0.04% |
2,794,000
+162,200
| +6% | +$4.31M |
2014 Q4
47 quarters
|
|
|
172
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$18.1B
| $78.6M | 0.04% |
+1,017,542
| New | +$80.6M |
2026 Q3
0 quarters
|
|
173
PUT
iShares Ethereum Trust ETF
ETHA
$6.4B
| $78.4M | 0.04% |
1,298,967
+314,167
| +32% | +$15.4M |
2025 Q2
5 quarters
|
|
174
PUT
Coca-Cola
KO
$413B
| $76.5M | 0.04% |
888,200
+113,300
| +15% | +$9.8M |
2021 Q2
21 quarters
|
|
175
PUT
Carvana
CVNA
$84.1B
| $76.4M | 0.04% |
1,221,500
-150,400
| -11% | -$10.3M |
2021 Q2
21 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.