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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 | |
|---|---|---|---|---|---|---|---|
851
PUT
NIO
NIO
$8.12B
| $8.56M | ﹤0.01% |
2,494,200
-1,540,400
| -38% | -$6.71M |
2018 Q3
32 quarters
|
|
852
CALL
Hershey
HSY
$35.5B
| $8.54M | ﹤0.01% |
54,200
| – | – |
2014 Q4
47 quarters
|
|
853
CALL
Ferrari
RACE
$72.9B
| $8.52M | ﹤0.01% |
21,700
+5,200
| +32% | +$2.08M |
2015 Q4
43 quarters
|
|
854
PUT
Intuitive Machines
LUNR
$1.97B
| $8.52M | ﹤0.01% |
598,300
+401,400
| +204% | +$6.21M |
2024 Q1
10 quarters
|
|
855
Palantir
PLTR
$415B
| $8.51M | ﹤0.01% |
45,506
-156,190
| -77% | -$24.9M |
2025 Q2
5 quarters
|
|
856
Cisco
CSCO
$397B
| $8.47M | ﹤0.01% |
+78,688
| New | +$8.87M |
2026 Q3
0 quarters
|
|
857
PUT
Hyperliquid Strategies Inc
PURR
$1.81B
| $8.46M | ﹤0.01% |
689,800
+234,000
| +51% | +$2.19M |
2026 Q1
2 quarters
|
|
858
Applovin
APP
$134B
| $8.44M | ﹤0.01% |
29,061
+28,468
| +4,801% | +$10.5M |
2026 Q1
2 quarters
|
|
859
CALL
Wheaton Precious Metals
WPM
$61.6B
| $8.44M | ﹤0.01% |
63,100
+23,300
| +59% | +$3.08M |
2026 Q1
2 quarters
|
|
860
CALL
DigitalOcean
DOCN
$10.3B
| $8.43M | ﹤0.01% |
63,200
-10,000
| -14% | -$1.26M |
2021 Q2
21 quarters
|
|
861
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $8.43M | ﹤0.01% |
59,200
+31,400
| +113% | +$828K |
2026 Q1
2 quarters
|
|
862
CALL
DELISTED
FIS Knights of Columbus Global Belief ETF
KOCG
| $8.39M | ﹤0.01% |
158,100
-13,800
| -8% | -$733K |
2024 Q2
9 quarters
|
|
863
PUT
BridgeBio Pharma
BBIO
$15.5B
| $8.36M | ﹤0.01% |
127,000
+53,500
| +73% | +$4.17M |
2020 Q1
26 quarters
|
|
864
CALL
Ecolab
ECL
$86.3B
| $8.35M | ﹤0.01% |
30,400
+6,500
| +27% | +$1.81M |
2014 Q4
47 quarters
|
|
865
PUT
Kohl's
KSS
$2.79B
| $8.25M | ﹤0.01% |
446,900
+142,700
| +47% | +$2.58M |
2014 Q4
47 quarters
|
|
866
PUT
The Kraft Heinz Company
KHC
$28.7B
| $8.24M | ﹤0.01% |
362,600
-231,600
| -39% | -$5.83M |
2015 Q3
44 quarters
|
|
867
CALL
Restaurant Brands International
QSR
$26.7B
| $8.24M | ﹤0.01% |
115,900
-9,500
| -8% | -$715K |
2015 Q1
46 quarters
|
|
868
CALL
Fastly Inc
FSLY
$2.78B
| $8.22M | ﹤0.01% |
320,300
+57,900
| +22% | +$1.34M |
2019 Q2
29 quarters
|
|
869
PUT
Argan
AGX
$4.52B
| $8.2M | ﹤0.01% |
21,700
+17,500
| +417% | +$9M |
2024 Q3
8 quarters
|
|
870
PUT
Unity
U
$22B
| $8.2M | ﹤0.01% |
200,300
+39,200
| +24% | +$1.51M |
2020 Q3
24 quarters
|
|
871
ProShares UltraPro Short QQQ
SQQQ
$1.79B
| $8.19M | ﹤0.01% |
238,032
+209,622
| +738% | +$8.2M |
2025 Q3
4 quarters
|
|
872
CALL
United Microelectronic
UMC
$40.3B
| $8.18M | ﹤0.01% |
334,100
-379,800
| -53% | -$8.12M |
2026 Q1
2 quarters
|
|
873
PUT
TJX Companies
TJX
$150B
| $8.18M | ﹤0.01% |
61,800
-1,000
| -2% | -$144K |
2014 Q4
47 quarters
|
|
874
CALL
Arthur J. Gallagher & Co
AJG
$72.3B
| $8.17M | ﹤0.01% |
35,800
+27,500
| +331% | +$6.9M |
2018 Q2
33 quarters
|
|
875
CALL
Check Point Software Technologies
CHKP
$15B
| $8.12M | ﹤0.01% |
63,300
+44,100
| +230% | +$5.86M |
2026 Q1
2 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.