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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
-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
Cap. Flow
-$519M
Cap. Flow %
-0.28%
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
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$92.6M
2
HYG icon
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
+$80.6M
3
AMZN icon
Amazon
AMZN
+$26.3M
4
XLI icon
State Street Industrial Select Sector SPDR ETF
XLI
+$25.7M
5
GLD icon
SPDR Gold Trust
GLD
+$20.7M

Top Sells

Rank Stock Value
1
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$128M
2
NVDA icon
NVIDIA
NVDA
+$97.8M
3
TSLA icon
Tesla
TSLA
+$53.9M
4
MU icon
Micron Technology
MU
+$50M
5
USO icon
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
BMY icon
251
PUT
Bristol-Myers Squibb
BMY
$128B
$48.3M 0.03%
774,400
+109,000
+16% +$6.89M
2014 Q4
47 quarters
FSLR icon
252
CALL
First Solar
FSLR
$19.4B
$47.9M 0.03%
273,500
+78,300
+40% +$16.6M
2021 Q1
22 quarters
AZO icon
253
CALL
AutoZone
AZO
$51.8B
$47.5M 0.03%
16,800
+8,800
+110% +$26.3M
2015 Q1
46 quarters
MA icon
254
CALL
Mastercard
MA
$574B
$47.5M 0.03%
86,200
+5,600
+7% +$3.15M
2021 Q2
21 quarters
MPC icon
255
PUT
Marathon Petroleum
MPC
$106B
$47.5M 0.03%
120,000
+57,200
+91% +$19.8M
2014 Q4
47 quarters
TGT icon
256
CALL
Target
TGT
$73.4B
$47.3M 0.03%
301,900
-5,900
-2% -$887K
2021 Q2
21 quarters
VRT icon
257
CALL
Vertiv
VRT
$74.2B
$46.4M 0.03%
192,200
+57,100
+42% +$15.6M
2020 Q2
25 quarters
GLW icon
258
PUT
Corning
GLW
$96.3B
$46.3M 0.03%
300,900
-206,900
-41% -$32.9M
2014 Q4
47 quarters
VST icon
259
CALL
Vistra
VST
$44.3B
$45.5M 0.02%
329,100
+48,600
+17% +$7.15M
2018 Q2
33 quarters
PG icon
260
CALL
Procter & Gamble
PG
$391B
$45.3M 0.02%
311,700
-216,800
-41% -$31.8M
2021 Q2
21 quarters
NVO icon
261
PUT
Novo Nordisk
NVO
$179B
$45.2M 0.02%
1,193,200
+83,500
+8% +$3.85M
2015 Q2
45 quarters
GUSH icon
262
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$168M
$45.1M 0.02%
2,192,200
+31,400
+1% +$1.27M
2019 Q4
27 quarters
SCIU
263
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
$44.7M 0.02%
729,100
-71,500
-9% -$4.38M
2016 Q1
42 quarters
ADBE icon
264
CALL
Adobe
ADBE
$91.5B
$44.3M 0.02%
184,600
-2,700
-1% -$676K
2014 Q4
47 quarters
CRCL icon
265
CALL
Circle Internet Group
CRCL
$16.7B
$44.2M 0.02%
538,100
-86,900
-14% -$6.7M
2025 Q2
5 quarters
SLB icon
266
CALL
SLB Ltd
SLB
$73.7B
$43.6M 0.02%
894,900
-270,900
-23% -$14M
2014 Q4
47 quarters
CRDO icon
267
CALL
Credo Technology Group
CRDO
$24.3B
$43.5M 0.02%
223,300
+118,200
+112% +$25.5M
2026 Q1
2 quarters
MA icon
268
PUT
Mastercard
MA
$574B
$43.4M 0.02%
78,700
+12,300
+19% +$6.92M
2021 Q2
21 quarters
PDD icon
269
PUT
Pinduoduo
PDD
$113B
$43.2M 0.02%
554,900
+129,700
+31% +$10.9M
2021 Q1
22 quarters
FSLR icon
270
PUT
First Solar
FSLR
$19.4B
$42.8M 0.02%
244,300
+126,100
+107% +$26.7M
2021 Q1
22 quarters
BIDU icon
271
CALL
Baidu
BIDU
$27.1B
$42.7M 0.02%
491,700
+96,000
+24% +$9.7M
2015 Q1
46 quarters
AXP icon
272
CALL
American Express
AXP
$217B
$42.3M 0.02%
139,100
+12,300
+10% +$4.11M
2015 Q1
46 quarters
CIFR icon
273
CALL
Cipher Digital
CIFR
$2.93B
$42.2M 0.02%
2,665,100
+1,192,600
+81% +$22.2M
2023 Q1
14 quarters
UPS icon
274
CALL
United Parcel Service
UPS
$94.5B
$42.1M 0.02%
450,300
-62,400
-12% -$6.55M
2020 Q4
23 quarters
SCIU
275
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
$42.1M 0.02%
855,800
+135,700
+19% +$6.67M
2016 Q2
41 quarters
9 10
11
12 13

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Swiss National Bank
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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.