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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 | |
|---|---|---|---|---|---|---|---|
1201
CALL
Regeneron Pharmaceuticals
REGN
$99.2B
| $4.93M | ﹤0.01% |
6,500
-7,000
| -52% | -$5.29M |
2021 Q2
21 quarters
|
|
1202
CALL
Casey's General Stores
CASY
$26.4B
| $4.93M | ﹤0.01% |
8,100
+5,000
| +161% | +$3.86M |
2023 Q2
13 quarters
|
|
1203
CALL
Cheesecake Factory
CAKE
$5.47B
| $4.91M | ﹤0.01% |
46,700
+39,800
| +577% | +$3.95M |
2017 Q4
35 quarters
|
|
1204
CALL
Futu Holdings
FUTU
$13.7B
| $4.91M | ﹤0.01% |
44,400
-12,300
| -22% | -$1.34M |
2020 Q3
24 quarters
|
|
1205
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$907M
| $4.9M | ﹤0.01% |
80,000
+46,500
| +139% | +$2.2M |
2026 Q1
2 quarters
|
|
1206
Oscar Health
OSCR
$10B
| $4.89M | ﹤0.01% |
158,715
-166,794
| -51% | -$5.13M |
2025 Q2
5 quarters
|
|
1207
CALL
Solstice Advanced Materials
SOLS
$10.6B
| $4.89M | ﹤0.01% |
86,900
+73,000
| +525% | +$4.42M |
2025 Q4
3 quarters
|
|
1208
CALL
NextDecade
NEXT
$1.76B
| $4.88M | ﹤0.01% |
768,600
-344,100
| -31% | -$2.47M |
2022 Q1
18 quarters
|
|
1209
PUT
General Mills
GIS
$18.3B
| $4.88M | ﹤0.01% |
151,600
-13,400
| -8% | -$500K |
2014 Q4
47 quarters
|
|
1210
PUT
Aflac
AFL
$62.9B
| $4.87M | ﹤0.01% |
43,600
+34,200
| +364% | +$4.1M |
2015 Q1
46 quarters
|
|
1211
PUT
Cboe Global Markets
CBOE
$38.5B
| $4.87M | ﹤0.01% |
17,700
-7,500
| -30% | -$2.13M |
2021 Q2
21 quarters
|
|
1212
CALL
YieldMax CRCL Option Income Strategy ETF
CRCO
$24.1M
| $4.87M | ﹤0.01% |
278,400
-52,700
| -16% | -$731K |
2025 Q4
3 quarters
|
|
1213
CALL
Warby Parker
WRBY
$3.75B
| $4.86M | ﹤0.01% |
175,100
+20,800
| +13% | +$541K |
2021 Q4
19 quarters
|
|
1214
Moderna
MRNA
$101B
| $4.86M | ﹤0.01% |
25,256
-129,302
| -84% | -$13.9M |
2024 Q4
7 quarters
|
|
1215
CALL
Bitdeer Technologies
BTDR
$1.91B
| $4.85M | ﹤0.01% |
462,300
-27,400
| -6% | -$312K |
2024 Q1
10 quarters
|
|
1216
Cardinal Health
CAH
$64.1B
| $4.85M | ﹤0.01% |
21,783
-2,052
| -9% | -$477K |
2025 Q4
3 quarters
|
|
1217
CALL
Burlington
BURL
$16.1B
| $4.84M | ﹤0.01% |
18,100
+16,100
| +805% | +$5M |
2021 Q2
21 quarters
|
|
1218
CALL
Fifth Third Bancorp
FITB
$49.2B
| $4.84M | ﹤0.01% |
95,600
-19,000
| -17% | -$1.06M |
2014 Q4
47 quarters
|
|
1219
CALL
nVent Electric
NVT
$18.9B
| $4.83M | ﹤0.01% |
30,100
+8,600
| +40% | +$1.35M |
2018 Q2
33 quarters
|
|
|
JPGE
1220
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $4.83M | ﹤0.01% |
85,800
+7,100
| +9% | +$399K |
2026 Q1
2 quarters
|
|
1221
Applied Digital
APLD
$5.42B
| $4.81M | ﹤0.01% |
197,451
+45,499
| +30% | +$1.28M |
2025 Q1
6 quarters
|
|
1222
CALL
RH
RH
$2.57B
| $4.81M | ﹤0.01% |
39,500
-4,200
| -10% | -$665K |
2014 Q4
47 quarters
|
|
1223
CALL
Opendoor
OPEN
$1.27B
| $4.81M | ﹤0.01% |
3,307,700
+468,200
| +16% | +$1.68M |
2020 Q3
24 quarters
|
|
1224
CALL
Abercrombie & Fitch
ANF
$6.45B
| $4.79M | ﹤0.01% |
35,600
+25,800
| +263% | +$3.01M |
2015 Q1
46 quarters
|
|
1225
Pan American Silver
PAAS
$16.2B
| $4.79M | ﹤0.01% |
105,148
+19,864
| +23% | +$948K |
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.