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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 | |
|---|---|---|---|---|---|---|---|
1826
PUT
Exelon
EXC
$47.2B
| $2.33M | ﹤0.01% |
57,700
-15,400
| -21% | -$688K |
2014 Q4
47 quarters
|
|
1827
CALL
Compass Diversified
CODI
$918M
| $2.33M | ﹤0.01% |
213,500
+102,500
| +92% | +$1.12M |
2018 Q2
33 quarters
|
|
1828
Revvity
RVTY
$17.7B
| $2.33M | ﹤0.01% |
+15,229
| New | +$1.87M |
2026 Q3
0 quarters
|
|
1829
CALL
Sensata Technologies
ST
$5.87B
| $2.33M | ﹤0.01% |
56,000
-8,600
| -13% | -$378K |
2026 Q1
2 quarters
|
|
1830
PUT
Capricor Therapeutics
CAPR
$652M
| $2.32M | ﹤0.01% |
245,400
+181,900
| +286% | +$2.01M |
2020 Q2
25 quarters
|
|
1831
HF Sinclair
DINO
$17.2B
| $2.32M | ﹤0.01% |
21,641
+10,374
| +92% | +$982K |
2024 Q2
9 quarters
|
|
1832
CALL
Zevra Therapeutics
ZVRA
$705M
| $2.32M | ﹤0.01% |
211,700
-112,800
| -35% | -$1.34M |
2024 Q3
8 quarters
|
|
1833
Clorox
CLX
$12.9B
| $2.32M | ﹤0.01% |
28,645
+16,430
| +135% | +$1.58M |
2025 Q2
5 quarters
|
|
1834
CALL
Aya Gold & Silver Inc
AYA
$3.53B
| $2.32M | ﹤0.01% |
86,100
+83,000
| +2,677% | +$2.05M |
2026 Q2
1 quarter
|
|
1835
CALL
Western Union
WU
$2.1B
| $2.31M | ﹤0.01% |
391,400
+123,700
| +46% | +$902K |
2017 Q4
35 quarters
|
|
1836
PUT
Bending Spoons S.p.A. Ordinary Shares
BSP
$26.6B
| $2.31M | ﹤0.01% |
+69,300
| New | +$2.64M |
2026 Q3
0 quarters
|
|
1837
American Airlines Group
AAL
$9.34B
| $2.3M | ﹤0.01% |
172,299
+87,084
| +102% | +$1.27M |
2024 Q2
9 quarters
|
|
1838
First Trust NASDAQ Cybersecurity ETF
CIBR
$16.7B
| $2.3M | ﹤0.01% |
22,315
+10,689
| +92% | +$1.02M |
2026 Q2
1 quarter
|
|
1839
CALL
Vanguard S&P 500 Growth ETF
VOOG
$26.5B
| $2.3M | ﹤0.01% |
26,900
-12,900
| -32% | -$1.08M |
2022 Q2
17 quarters
|
|
1840
PUT
Virgin Galactic
SPCE
$435M
| $2.3M | ﹤0.01% |
768,000
-67,300
| -8% | -$195K |
2026 Q1
2 quarters
|
|
1841
PUT
Celanese
CE
$5.65B
| $2.29M | ﹤0.01% |
51,700
+6,800
| +15% | +$311K |
2017 Q4
35 quarters
|
|
1842
PUT
Manchester United
MANU
$4.09B
| $2.29M | ﹤0.01% |
109,400
+25,700
| +31% | +$565K |
2019 Q3
28 quarters
|
|
1843
PUT
XPeng
XPEV
$9.42B
| $2.29M | ﹤0.01% |
239,700
-278,600
| -54% | -$3.3M |
2020 Q3
24 quarters
|
|
1844
PUT
Vodafone
VOD
$36.2B
| $2.29M | ﹤0.01% |
141,800
+27,100
| +24% | +$431K |
2014 Q4
47 quarters
|
|
1845
Firefly Aerospace
FLY
$4.45B
| $2.29M | ﹤0.01% |
+98,879
| New | +$2.26M |
2026 Q3
0 quarters
|
|
1846
PUT
Omega Healthcare
OHI
$14.6B
| $2.28M | ﹤0.01% |
49,300
+44,900
| +1,020% | +$2.15M |
2015 Q3
44 quarters
|
|
1847
CALL
LKQ Corp
LKQ
$5.05B
| $2.28M | ﹤0.01% |
99,900
+67,400
| +207% | +$1.67M |
2016 Q1
42 quarters
|
|
1848
PUT
Darden Restaurants
DRI
$25.9B
| $2.28M | ﹤0.01% |
11,800
+2,800
| +31% | +$585K |
2014 Q4
47 quarters
|
|
1849
CALL
GXO Logistics
GXO
$6.22B
| $2.28M | ﹤0.01% |
51,300
+12,200
| +31% | +$593K |
2021 Q4
19 quarters
|
|
1850
CALL
Bit Digital
BTBT
$287M
| $2.28M | ﹤0.01% |
1,398,700
+365,800
| +35% | +$564K |
2021 Q1
22 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.