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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 | |
|---|---|---|---|---|---|---|---|
201
CALL
TeraWulf
WULF
$6.21B
| $63.1M | 0.03% |
4,263,900
+1,586,300
| +59% | +$27.8M |
2023 Q2
13 quarters
|
|
202
CALL
iShares Gold Trust
IAU
$61.3B
| $63.1M | 0.03% |
807,800
+50,600
| +7% | +$4.06M |
2017 Q3
36 quarters
|
|
203
PUT
Applovin
APP
$136B
| $62.4M | 0.03% |
214,900
+33,300
| +18% | +$12.3M |
2021 Q2
21 quarters
|
|
204
PUT
Nike
NKE
$59.2B
| $62.1M | 0.03% |
1,753,800
-181,700
| -9% | -$7.29M |
2014 Q4
47 quarters
|
|
205
CALL
Charles Schwab
SCHW
$160B
| $61.6M | 0.03% |
630,300
+271,500
| +76% | +$28.6M |
2021 Q2
21 quarters
|
|
206
PUT
Uber
UBER
$145B
| $61M | 0.03% |
889,800
-88,500
| -9% | -$6.47M |
2021 Q1
22 quarters
|
|
207
PUT
State Street SPDR Portfolio Short Term Treasury Index ETF
SPTS
$7.39B
| $60.2M | 0.03% |
343,600
+91,800
| +36% | +$2.65M |
2019 Q2
29 quarters
|
|
208
PUT
AST SpaceMobile
ASTS
$11.1B
| $59.9M | 0.03% |
1,018,400
+89,200
| +10% | +$5.75M |
2021 Q1
22 quarters
|
|
209
PUT
Snowflake
SNOW
$103B
| $59.7M | 0.03% |
175,700
-47,800
| -21% | -$14.8M |
2021 Q1
22 quarters
|
|
|
210
CALL
AST SpaceMobile
ASTS
$11.1B
| $58.9M | 0.03% |
1,001,000
+152,400
| +18% | +$9.8M |
2021 Q1
22 quarters
|
|
211
CALL
Shopify
SHOP
$196B
| $57.9M | 0.03% |
390,100
-59,700
| -13% | -$8.1M |
2016 Q1
42 quarters
|
|
212
CALL
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$151M
| $57.4M | 0.03% |
1,869,300
+118,500
| +7% | +$3.18M |
2023 Q1
14 quarters
|
|
213
CALL
Wells Fargo
WFC
$257B
| $57.2M | 0.03% |
714,800
+82,800
| +13% | +$7.16M |
2021 Q2
21 quarters
|
|
214
PUT
Hewlett Packard
HPE
$63.1B
| $56.7M | 0.03% |
887,400
+257,600
| +41% | +$13.6M |
2026 Q1
2 quarters
|
|
215
CALL
Occidental Petroleum
OXY
$55.7B
| $56.6M | 0.03% |
1,022,900
-438,000
| -30% | -$25M |
2020 Q1
26 quarters
|
|
216
CALL
Shell
SHEL
$280B
| $56.5M | 0.03% |
594,800
+59,700
| +11% | +$5.39M |
2022 Q1
18 quarters
|
|
217
CALL
MongoDB
MDB
$26.4B
| $56.2M | 0.03% |
161,100
+46,300
| +40% | +$17.5M |
2021 Q1
22 quarters
|
|
218
CALL
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$24.4M
| $56.1M | 0.03% |
1,794,800
-3,265,800
| -65% | -$50.5M |
2025 Q3
4 quarters
|
|
219
CALL
PG&E
PCG
$28.9B
| $56.1M | 0.03% |
4,575,700
+1,990,400
| +77% | +$31.9M |
2017 Q4
35 quarters
|
|
220
CALL
PepsiCo
PEP
$193B
| $56M | 0.03% |
442,000
+119,100
| +37% | +$16.4M |
2014 Q4
47 quarters
|
|
221
CALL
Astera Labs
ALAB
$37.9B
| $56M | 0.03% |
157,200
-44,000
| -22% | -$14.2M |
2024 Q1
10 quarters
|
|
222
CALL
BitMine Immersion Technologies
BMNR
$11.2B
| $55.2M | 0.03% |
2,088,500
-799,600
| -28% | -$16.5M |
2026 Q1
2 quarters
|
|
223
CALL
Verizon
VZ
$191B
| $55.2M | 0.03% |
1,203,100
-110,300
| -8% | -$5.19M |
2014 Q4
47 quarters
|
|
224
CALL
Accenture
ACN
$150B
| $54.8M | 0.03% |
298,600
+17,800
| +6% | +$3.01M |
2021 Q2
21 quarters
|
|
225
CALL
Reddit
RDDT
$19.5B
| $54.8M | 0.03% |
384,400
+4,700
| +1% | +$777K |
2024 Q1
10 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.