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Simplex Trading

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
+3.1%
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
$149B
AUM Growth
-$28.3B
Cap. Flow
-$294M
Cap. Flow %
-0.2%
Top 10 Hldgs %
51.08%
Holding
10,500
New
2,157
Increased
2,651
Reduced
3,925
Closed
1,575
Avg Time Held Equity + Options
2.9 years
Top 10 Avg Time Held Equity + Options
3.7 years
Top 20 Avg Time Held Equity + Options
4.2 years
Avg Time Held Equity only
0.5 years
Top 10 Avg Time Held Equity only
0.3 years
Top 20 Avg Time Held Equity only
0.3 years

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$168M
2
NVDA icon
NVIDIA
NVDA
+$141M
3
TSM icon
TSMC
TSM
+$121M
4
META icon
Meta Platforms (Facebook)
META
+$107M
5
GLD icon
SPDR Gold Trust
GLD
+$103M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$174M
2
WDC icon
Western Digital
WDC
+$87.7M
3
AVGO icon
Broadcom
AVGO
+$62.2M
4
SOXL icon
Direxion Daily Semiconductor Bull 3X ETF
SOXL
+$52M
5
NFLX icon
Netflix
NFLX
+$44.6M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.3%
2 Technology 0.62%
3 Communication Services 0.22%
4 Consumer Discretionary 0.21%
5 Healthcare 0.2%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow Held Since
SPY icon
1
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$800B
$27.4B 18.39%
42,147,900
+893,700
+2% +$608M
2015 Q1
44 quarters
SPY icon
2
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$800B
$14.1B 9.44%
21,650,100
+2,216,500
+11% +$1.51B
2015 Q1
44 quarters
QQQ icon
3
PUT
Invesco QQQ Trust
QQQ
$461B
$6.49B 4.36%
11,252,400
-4,113,000
-27% -$2.5B
2021 Q2
19 quarters
QQQ icon
4
CALL
Invesco QQQ Trust
QQQ
$461B
$5.99B 4.02%
10,378,200
+839,600
+9% +$510M
2021 Q2
19 quarters
OEF icon
5
PUT
iShares S&P 100 ETF
OEF
$19.9B
$5.11B 3.43%
34,218,500
+661,000
+2% +$222M
2014 Q4
45 quarters
OEF icon
6
CALL
iShares S&P 100 ETF
OEF
$19.9B
$3.87B 2.6%
33,449,000
+7,313,200
+28% +$2.45B
2014 Q4
45 quarters
TSLA icon
7
CALL
Tesla
TSLA
$1.54T
$3.42B 2.29%
9,196,400
-2,494,600
-21% -$1.03B
2021 Q2
19 quarters
NVDA icon
8
PUT
NVIDIA
NVDA
$3.93T
$3.35B 2.25%
19,209,500
-7,149,700
-27% -$1.31B
2021 Q2
19 quarters
NVDA icon
9
CALL
NVIDIA
NVDA
$3.93T
$3.33B 2.23%
19,080,700
-9,605,500
-33% -$1.76B
2021 Q2
19 quarters
TSLA icon
10
PUT
Tesla
TSLA
$1.54T
$3.09B 2.07%
8,312,400
-4,530,300
-35% -$1.87B
2021 Q2
19 quarters
GLD icon
11
CALL
SPDR Gold Trust
GLD
$130B
$2.36B 1.58%
5,490,500
-931,200
-15% -$417M
2015 Q1
44 quarters
META icon
12
CALL
Meta Platforms (Facebook)
META
$1.64T
$2.35B 1.58%
4,109,700
-496,200
-11% -$318M
2014 Q4
45 quarters
AAPL icon
13
CALL
Apple
AAPL
$5.18T
$2.22B 1.49%
8,760,100
-525,800
-6% -$137M
2015 Q1
44 quarters
GOOGL icon
14
CALL
Alphabet (Google) Class A
GOOGL
$3.64T
$2.07B 1.39%
7,197,200
-1,747,000
-20% -$549M
2015 Q4
41 quarters
GLD icon
15
PUT
SPDR Gold Trust
GLD
$130B
$1.65B 1.11%
3,830,900
-320,700
-8% -$144M
2015 Q1
44 quarters
MSFT icon
16
CALL
Microsoft
MSFT
$3.89T
$1.55B 1.04%
4,178,400
+1,091,200
+35% +$457M
2014 Q4
45 quarters
AAPL icon
17
PUT
Apple
AAPL
$5.18T
$1.53B 1.03%
6,022,900
-1,723,000
-22% -$448M
2015 Q1
44 quarters
AMZN icon
18
CALL
Amazon
AMZN
$2.88T
$1.46B 0.98%
7,000,500
+1,139,800
+19% +$251M
2015 Q1
44 quarters
GOOGL icon
19
PUT
Alphabet (Google) Class A
GOOGL
$3.64T
$1.45B 0.97%
5,053,100
-2,304,200
-31% -$724M
2015 Q4
41 quarters
META icon
20
PUT
Meta Platforms (Facebook)
META
$1.64T
$1.43B 0.96%
2,501,500
+75,900
+3% +$48.6M
2014 Q4
45 quarters
SLV icon
21
CALL
iShares Silver Trust
SLV
$23.8B
$1.36B 0.91%
19,990,100
+2,085,200
+12% +$158M
2021 Q2
19 quarters
XLB icon
22
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.41B
$1.02B 0.69%
15,375,700
-1,405,400
-8% -$70.5M
2015 Q1
44 quarters
AMZN icon
23
PUT
Amazon
AMZN
$2.88T
$914M 0.61%
4,388,700
+30,600
+0.7% +$6.74M
2015 Q1
44 quarters
MSFT icon
24
PUT
Microsoft
MSFT
$3.89T
$876M 0.59%
2,366,200
+122,800
+5% +$51.4M
2014 Q4
45 quarters
GDX icon
25
PUT
VanEck Gold Miners ETF
GDX
$25.2B
$820M 0.55%
3,276,100
-1,459,800
-31% -$144M
2014 Q4
45 quarters
1
2 3 4 5

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Simplex Trading's Q1 2026 Portfolio in Review

As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.

Simplex Trading's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,925 reduced and 1,575 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
  • Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
  • Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
  • Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
  • Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
  • Simplex Trading opened 2,157 new positions and closed 1,575 in Q1 2026.
  • Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.