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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+33.36%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$62.7B
AUM Growth
+$5.97B
Cap. Flow
+$178M
Cap. Flow %
0.28%
Top 10 Hldgs %
44.28%
Holding
8,917
New
1,291
Increased
3,426
Reduced
2,723
Closed
1,278

Top Buys

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$77.3M
2
GLD icon
SPDR Gold Trust
GLD
+$73.2M
3
EFA icon
iShares MSCI EAFE ETF
EFA
+$38.5M
4
NFLX icon
Netflix
NFLX
+$38.4M
5
NVDA icon
NVIDIA
NVDA
+$36.3M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$55.9M
2
VXX icon
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
+$28.3M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$23.1M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$23.1M
5
ADBE icon
Adobe
ADBE
+$22M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.74%
2 Technology 0.49%
3 Consumer Discretionary 0.48%
4 Communication Services 0.35%
5 Healthcare 0.27%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SOXX icon
8301
iShares Semiconductor ETF
SOXX
$42.8B
– –
-11,547
Closed -$789K
SPNT icon
8302
SiriusPoint
SPNT
$2.84B
– –
-8
Closed -$60
SPTN
8303
DELISTED
SpartanNash
SPTN
– –
-6,831
Closed -$123K
SPXC icon
8304
SPX Corp
SPXC
$9.84B
– –
-2,010
Closed -$75.7K
SPYG icon
8305
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$54.6B
$0 ﹤0.01%
6,110
+5,410
+773% +$225K
SQQQ icon
8306
ProShares UltraPro Short QQQ
SQQQ
$2.09B
– –
-223
Closed -$2.71M
SRDX
8307
CALL
DELISTED
Surmodics
SRDX
– –
-18
Closed -$59K
SSB icon
8308
SouthState Bank Corp
SSB
$10.5B
– –
-14,414
Closed -$753K
SSD icon
8309
Simpson Manufacturing
SSD
$7.42B
– –
-2,483
Closed -$183K
SSD icon
8310
PUT
Simpson Manufacturing
SSD
$7.42B
– –
-47
Closed -$291K
SSNC icon
8311
SS&C Technologies
SSNC
$19.6B
– –
-23,926
Closed -$1.3M
STC icon
8312
Stewart Information Services
STC
$2.06B
– –
-246
Closed -$7.4K
STC icon
8313
PUT
Stewart Information Services
STC
$2.06B
– –
-2
Closed -$5K
STE icon
8314
Steris
STE
$21.9B
– –
-278
Closed -$42.3K
STLA icon
8315
CALL
Stellantis
STLA
$16.1B
– –
-597
Closed -$429K
STLA icon
8316
Stellantis
STLA
$16.1B
– –
-40,472
Closed -$350K
STLA icon
8317
PUT
Stellantis
STLA
$16.1B
– –
-1,554
Closed -$1.12M
STLD icon
8318
Steel Dynamics
STLD
$34.7B
– –
-700
Closed -$17.5K
STNG icon
8319
CALL
Scorpio Tankers
STNG
$4.12B
– –
-1,659
Closed -$3.17M
STNG icon
8320
Scorpio Tankers
STNG
$4.12B
$0 ﹤0.01%
63,630
+32,638
+105% +$592K
STNG icon
8321
PUT
Scorpio Tankers
STNG
$4.12B
– –
-1,372
Closed -$2.62M
STRA icon
8322
PUT
Strategic Education
STRA
$1.81B
– –
-2
Closed -$27K
STRL icon
8323
Sterling Infrastructure
STRL
$14.9B
– –
-1,651
Closed -$15.2K
STT icon
8324
State Street
STT
$53.4B
– –
-6,639
Closed -$401K
SUI icon
8325
PUT
Sun Communities
SUI
$14.5B
– –
-372
Closed -$4.64M
331 332
333
334 335

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Simplex Trading's Q2 2020 Portfolio in Review

As of Q2 2020, Simplex Trading held 8,917 positions worth $62.7B, up 11% from $56.7B the previous quarter. Its ten largest holdings account for 44% of the portfolio.

Simplex Trading's Q2 2020 filing shows 1,291 new, 3,426 increased, 2,723 reduced and 1,278 closed positions. Its largest new stake was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M. The largest sale was Apple, an estimated $55.9M.

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

  • Simplex Trading's largest Q2 2020 buy was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M.
  • Simplex Trading added most to Invesco QQQ Trust in Q2 2020, an estimated $77.3M increase.
  • Simplex Trading's biggest Q2 2020 reduction was Apple, cutting an estimated $55.9M.
  • Simplex Trading fully exited Adobe in Q2 2020, selling an estimated $22M.
  • Simplex Trading's ten largest holdings make up 44% of its $62.7B portfolio in Q2 2020.
  • Simplex Trading opened 1,291 new positions and closed 1,278 in Q2 2020.
  • Simplex Trading's portfolio value rose 11% quarter-over-quarter to $62.7B.

Based on Simplex Trading's 13F filing for Q2 2020, filed 13 Jul 2020.