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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

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
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$62.7B
AUM Growth
+$5.97B
Cap. Flow
-$480M
Cap. Flow %
-0.77%
Top 10 Hldgs %
44.28%
Holding
8,917
New
1,290
Increased
3,427
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 Technology 0.49%
2 Consumer Discretionary 0.47%
3 Communication Services 0.34%
4 Healthcare 0.26%
5 Financials 0.23%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RYTM icon
8251
CALL
Rhythm Pharmaceuticals
RYTM
$7.13B
– –
-1
Closed -$1K
RYTM icon
8252
Rhythm Pharmaceuticals
RYTM
$7.13B
– –
-1,209
Closed -$18K
RYTM icon
8253
PUT
Rhythm Pharmaceuticals
RYTM
$7.13B
– –
-13
Closed -$19K
SAGE
8254
DELISTED
Sage Therapeutics
SAGE
– –
-10,779
Closed -$391K
SAIA icon
8255
PUT
Saia
SAIA
$11.3B
– –
-131
Closed -$963K
SAND
8256
DELISTED
Sandstorm Gold
SAND
– –
-82,028
Closed -$644K
SANW
8257
DELISTED
S&W Seed Co
SANW
$0 ﹤0.01%
+5
New +$197
SAP icon
8258
SAP
SAP
$174B
– –
-21,143
Closed -$2.61M
FLNA
8259
Filana Therapeutics
FLNA
$46.6M
$0 ﹤0.01%
210
-39,861
-99% -$181K
SB icon
8260
CALL
Safe Bulkers
SB
$749M
– –
-307
Closed -$36K
SB icon
8261
Safe Bulkers
SB
$749M
$0 ﹤0.01%
+107
New +$117
SCHD icon
8262
Schwab US Dividend Equity ETF
SCHD
$101B
– –
-10,329
Closed -$154K
SCL icon
8263
CALL
Stepan Co
SCL
$1.34B
– –
-59
Closed -$521K
SCL icon
8264
PUT
Stepan Co
SCL
$1.34B
– –
-2
Closed -$17K
SCM icon
8265
Stellus Capital Investment Corp
SCM
$206M
$0 ﹤0.01%
32
-731
-96% -$5.54K
SCOR icon
8266
CALL
Comscore
SCOR
$119M
– –
-1
Closed -$2K
SD icon
8267
SandRidge Energy
SD
$517M
– –
-6,128
Closed -$9.2K
SD icon
8268
PUT
SandRidge Energy
SD
$517M
– –
-32
Closed -$2K
SDY icon
8269
State Street SPDR S&P Dividend ETF
SDY
$21.7B
– –
-371
Closed -$29K
SEE
8270
DELISTED
Sealed Air
SEE
– –
-3,262
Closed -$97.9K
SEIC icon
8271
CALL
SEI Investments
SEIC
$11.9B
– –
-45
Closed -$208K
SFBS
8272
ServisFirst Bancshares
SFBS
$4.74B
– –
-90
Closed -$2.97K
SFIX
8273
CALL
Stitch Fix
SFIX
$500M
– –
-496
Closed -$629K
SFIX
8274
Stitch Fix
SFIX
$500M
$0 ﹤0.01%
+70,014
New +$1.38M
SFIX
8275
PUT
Stitch Fix
SFIX
$500M
– –
-571
Closed -$725K
329 330
331
332 333

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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 1,290 new, 3,427 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 Technology at 0.49% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • 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 1,290 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.