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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
SFM icon
8276
Sprouts Farmers Market
SFM
$7.59B
– –
-15,144
Closed -$347K
SGU icon
8277
CALL
Star Group
SGU
$418M
– –
-46
Closed -$35K
SHAK icon
8278
CALL
Shake Shack
SHAK
$2.8B
– –
-516
Closed -$1.95M
SHAK icon
8279
Shake Shack
SHAK
$2.8B
$0 ﹤0.01%
28,462
-1,310
-4% -$66.2K
SHAK icon
8280
PUT
Shake Shack
SHAK
$2.8B
– –
-1,109
Closed -$4.18M
SH icon
8281
ProShares Short S&P500
SH
$863M
– –
-34,703
Closed -$3.84M
SHW icon
8282
Sherwin-Williams
SHW
$81B
– –
-1,941
Closed -$350K
SIGA icon
8283
SIGA Technologies
SIGA
$236M
– –
-18,075
Closed -$103K
SIVR icon
8284
abrdn Physical Silver Shares ETF
SIVR
$4.48B
$0 ﹤0.01%
+24
New +$381
SJM icon
8285
J.M. Smucker
SJM
$13.5B
– –
-1,090
Closed -$122K
SKM icon
8286
SK Telecom
SKM
$14.9B
– –
-2,379
Closed -$73.4K
SKT icon
8287
Tanger
SKT
$4.29B
– –
-100
Closed -$661
SKY icon
8288
PUT
Champion Homes
SKY
$4.76B
– –
-15
Closed -$23K
SKYW icon
8289
Skywest
SKYW
$3.85B
– –
-807
Closed -$23.9K
SLDB icon
8290
Solid Biosciences
SLDB
$1.1B
– –
-3,328
Closed -$138K
SLP icon
8291
Simulations Plus
SLP
$373M
– –
-7,229
Closed -$318K
SM icon
8292
SM Energy
SM
$8.67B
– –
-15,205
Closed -$49.8K
SMH icon
8293
VanEck Semiconductor ETF
SMH
$69B
– –
-29,172
Closed -$1.71M
SMHI icon
8294
SEACOR Marine Holdings
SMHI
$265M
$0 ﹤0.01%
+68
New +$194
SNAP icon
8295
Snap
SNAP
$9.25B
– –
-193,530
Closed -$3.44M
SND icon
8296
Smart Sand
SND
$226M
– –
-18,205
Closed -$17.2K
SNDR icon
8297
Schneider National
SNDR
$6.14B
– –
-761
Closed -$16.7K
SNDR icon
8298
PUT
Schneider National
SNDR
$6.14B
– –
-20
Closed -$38K
SNV
8299
DELISTED
Synovus
SNV
– –
-13,346
Closed -$258K
SOL
8300
DELISTED
Emeren Group
SOL
$0 ﹤0.01%
+90
New +$96
330 331
332
333 334

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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.