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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 | |
|---|---|---|---|---|---|---|---|
3576
PUT
Tuniu
TOUR
$50.6M
| $496K | ﹤0.01% |
+100,000
| New | +$503K |
2026 Q3
0 quarters
|
|
3577
PUT
Grupo Supervielle
SUPV
$510M
| $496K | ﹤0.01% |
69,700
-82,000
| -54% | -$719K |
2021 Q2
21 quarters
|
|
3578
HIVE Digital Technologies
HIVE
$426M
| $495K | ﹤0.01% |
167,754
-95,991
| -36% | -$289K |
2026 Q1
2 quarters
|
|
3579
PUT
CorMedix
CRMD
$385M
| $494K | ﹤0.01% |
64,200
+23,300
| +57% | +$187K |
2019 Q1
30 quarters
|
|
3580
Arrowhead Research
ARWR
$6.7B
| $493K | ﹤0.01% |
7,536
-21,466
| -74% | -$1.74M |
2026 Q1
2 quarters
|
|
3581
CALL
ZenaTech Inc
ZENA
$117M
| $493K | ﹤0.01% |
376,500
-62,500
| -14% | -$97.9K |
2025 Q2
5 quarters
|
|
3582
CALL
Woodward
WWD
$19.4B
| $493K | ﹤0.01% |
1,500
-500
| -25% | -$181K |
2023 Q3
12 quarters
|
|
3583
CALL
Dynex Capital
DX
$2.59B
| $492K | ﹤0.01% |
44,200
-8,600
| -16% | -$109K |
2026 Q1
2 quarters
|
|
3584
CALL
Under Armour Class C
UA
$2.04B
| $492K | ﹤0.01% |
112,300
-50,000
| -31% | -$283K |
2016 Q2
41 quarters
|
|
3585
CALL
Voya Financial
VOYA
$9.14B
| $491K | ﹤0.01% |
5,200
-1,200
| -19% | -$119K |
2025 Q1
6 quarters
|
|
3586
PUT
Fidelity Enhanced Large Cap Core ETF
FELC
$8.7B
| $491K | ﹤0.01% |
5,100
| – | – |
2023 Q4
11 quarters
|
|
3587
PUT
Goldman Sachs ActiveBeta International Equity ETF
GSIE
$5.98B
| $491K | ﹤0.01% |
+4,900
| New | +$231K |
2026 Q3
0 quarters
|
|
3588
CALL
Scotiabank
BNS
$113B
| $491K | ﹤0.01% |
5,400
-6,700
| -55% | -$603K |
2017 Q2
37 quarters
|
|
3589
CALL
Babcock & Wilcox
BW
$641M
| $489K | ﹤0.01% |
83,800
+29,900
| +55% | +$262K |
2026 Q1
2 quarters
|
|
3590
CALL
Cerence
CRNC
$353M
| $489K | ﹤0.01% |
62,500
-2,500
| -4% | -$21.8K |
2019 Q4
27 quarters
|
|
3591
CALL
Movado Group
MOV
$704M
| $489K | ﹤0.01% |
14,700
+500
| +4% | +$17.9K |
2025 Q1
6 quarters
|
|
3592
PUT
Heritage Financial
HFWA
$1.15B
| $489K | ﹤0.01% |
17,700
| – | – |
2025 Q2
5 quarters
|
|
3593
Rapid7
RPD
$969M
| $488K | ﹤0.01% |
39,932
+27,444
| +220% | +$316K |
2026 Q2
1 quarter
|
|
3594
Figure Technology Solutions
FIGR
$5.78B
| $488K | ﹤0.01% |
+16,905
| New | +$549K |
2026 Q3
0 quarters
|
|
3595
A.O. Smith
AOS
$8.67B
| $487K | ﹤0.01% |
+8,648
| New | +$521K |
2026 Q3
0 quarters
|
|
3596
CALL
Destiny Tech100
DXYZ
$784M
| $487K | ﹤0.01% |
15,800
-40,000
| -72% | -$1.16M |
2026 Q2
1 quarter
|
|
3597
PUT
Bit Digital
BTBT
$243M
| $487K | ﹤0.01% |
299,000
+117,400
| +65% | +$181K |
2021 Q1
22 quarters
|
|
3598
PUT
Vanguard FTSE Developed Markets ETF
VEA
$228B
| $487K | ﹤0.01% |
6,900
+5,300
| +331% | +$380K |
2019 Q2
29 quarters
|
|
3599
CALL
Methanex
MEOH
$5.38B
| $487K | ﹤0.01% |
8,300
+5,200
| +168% | +$292K |
2015 Q4
43 quarters
|
|
3600
PUT
Jazz Pharmaceuticals
JAZZ
$15.4B
| $486K | ﹤0.01% |
2,100
+500
| +31% | +$124K |
2015 Q1
46 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.