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 | |
|---|---|---|---|---|---|---|---|
176
CALL
Merck
MRK
$367B
| $75.9M | 0.04% |
522,400
+138,400
| +36% | +$19.1M |
2021 Q1
22 quarters
|
|
177
CALL
Newmont
NEM
$130B
| $74.6M | 0.04% |
646,500
-390,900
| -38% | -$43.8M |
2021 Q2
21 quarters
|
|
178
CALL
Intuit
INTU
$90.4B
| $72M | 0.04% |
261,000
+4,400
| +2% | +$1.38M |
2014 Q4
47 quarters
|
|
179
CALL
Arista Networks
ANET
$235B
| $71.7M | 0.04% |
352,300
-72,100
| -17% | -$13.6M |
2021 Q2
21 quarters
|
|
180
CALL
McDonald's
MCD
$199B
| $71.6M | 0.04% |
310,100
-83,400
| -21% | -$22M |
2021 Q2
21 quarters
|
|
181
PUT
Vertiv
VRT
$77.2B
| $71.5M | 0.04% |
296,300
+153,500
| +107% | +$41.8M |
2022 Q3
16 quarters
|
|
182
CALL
GameStop
GME
$12.9B
| $70.8M | 0.04% |
4,120,500
+151,700
| +4% | +$3.15M |
2021 Q2
21 quarters
|
|
183
PUT
Wells Fargo
WFC
$257B
| $70M | 0.04% |
874,700
+179,000
| +26% | +$15.5M |
2021 Q2
21 quarters
|
|
184
CALL
ARK Space & Defense Innovation ETF
ARKX
$673M
| $69M | 0.04% |
941,600
+106,200
| +13% | +$3.43M |
2021 Q2
21 quarters
|
|
185
PUT
Vanguard S&P 500 ETF
VOO
$1.04T
| $68.2M | 0.04% |
192,700
-187,900
| -49% | -$131M |
2014 Q4
47 quarters
|
|
186
PUT
Costco
COST
$472B
| $68M | 0.04% |
74,700
+24,300
| +48% | +$22.7M |
2021 Q2
21 quarters
|
|
187
CALL
GE Vernova
GEV
$220B
| $68M | 0.04% |
71,500
-27,800
| -28% | -$27.5M |
2024 Q2
9 quarters
|
|
188
PUT
Qualcomm
QCOM
$183B
| $67.7M | 0.04% |
367,600
-195,900
| -35% | -$33.9M |
2021 Q2
21 quarters
|
|
189
CALL
Cloudflare
NET
$105B
| $67.4M | 0.04% |
194,200
+21,200
| +12% | +$6.28M |
2021 Q1
22 quarters
|
|
190
PUT
Morgan Stanley
MS
$292B
| $66.8M | 0.04% |
355,200
-47,000
| -12% | -$10M |
2014 Q4
47 quarters
|
|
191
PUT
IBM
IBM
$233B
| $65.9M | 0.04% |
299,500
+26,600
| +10% | +$6.32M |
2026 Q1
2 quarters
|
|
192
PUT
ProShares UltraPro Short QQQ
SQQQ
$1.89B
| $65.6M | 0.04% |
1,651,200
+228,500
| +16% | +$8.94M |
2025 Q4
3 quarters
|
|
193
CALL
Freeport-McMoran
FCX
$89.4B
| $64.7M | 0.04% |
924,700
-462,800
| -33% | -$31.5M |
2021 Q2
21 quarters
|
|
194
PUT
KLA
KLAC
$197B
| $64.5M | 0.04% |
330,700
+79,300
| +32% | +$15.6M |
2014 Q4
47 quarters
|
|
195
CALL
Rocket Lab Corp
RKLB
$37.6B
| $64.3M | 0.04% |
922,200
+256,200
| +38% | +$18.5M |
2021 Q4
19 quarters
|
|
196
Apple
AAPL
$5.1T
| $64.2M | 0.03% |
192,718
-66,831
| -26% | -$21.5M |
2024 Q3
8 quarters
|
|
197
PUT
MongoDB
MDB
$26.4B
| $63.9M | 0.03% |
183,300
+111,900
| +157% | +$42.2M |
2021 Q1
22 quarters
|
|
198
PUT
SoFi Technologies
SOFI
$21.7B
| $63.5M | 0.03% |
4,039,300
+744,800
| +23% | +$13.1M |
2020 Q4
23 quarters
|
|
199
CALL
Hewlett Packard
HPE
$63.1B
| $63.5M | 0.03% |
993,700
+351,900
| +55% | +$18.6M |
2026 Q1
2 quarters
|
|
200
CALL
Nokia
NOK
$46.3B
| $63.4M | 0.03% |
6,256,800
-156,800
| -2% | -$1.63M |
2017 Q4
35 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.