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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
-0.41%
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
$1.25B
AUM Growth
-$22.5M
Cap. Flow
-$16M
Cap. Flow %
-1.28%
Top 10 Hldgs %
17.26%
Holding
7,084
New
1,678
Increased
2,214
Reduced
1,528
Closed
1,505

Top Buys

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$33.7M
2
GLD icon
SPDR Gold Trust
GLD
+$17.8M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$14.3M
4
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$11.9M
5
C icon
Citigroup
C
+$8.7M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.2M
2
GMCR
KEURIG GREEN MTN INC
GMCR
+$17.9M
3
CMG icon
Chipotle Mexican Grill
CMG
+$14.7M
4
DIS icon
Walt Disney
DIS
+$13.3M
5
BKNG icon
Booking.com
BKNG
+$12.1M

Sector Composition

Rank Sector Weight
1 Technology 7.64%
2 Communication Services 6.85%
3 Consumer Discretionary 4.92%
4 Healthcare 4.57%
5 Financials 4.22%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
PIZ icon
4776
PUT
Invesco Dorsey Wright Developed Markets Momentum ETF
PIZ
$729M
$2K ﹤0.01%
96
-10
-9% -$221
PJT icon
4777
CALL
PJT Partners
PJT
$4.36B
$2K ﹤0.01%
+34
New +$876
PLAB icon
4778
CALL
Photronics
PLAB
$1.76B
$2K ﹤0.01%
7
-10
-59% -$108
PRGS icon
4779
CALL
Progress Software
PRGS
$1.59B
$2K ﹤0.01%
23
-27
-54% -$663
PSMT icon
4780
PUT
Pricesmart
PSMT
$5.81B
$2K ﹤0.01%
20
-61
-75% -$4.74K
PUK icon
4781
Prudential
PUK
$36.6B
$2K ﹤0.01%
+72
New +$2.61K
PXLW icon
4782
CALL
Pixelworks
PXLW
$37.9M
$2K ﹤0.01%
+4
New +$96
RBA icon
4783
CALL
RB Global
RBA
$21.7B
$2K ﹤0.01%
+10
New +$236
RGA icon
4784
PUT
Reinsurance Group of America
RGA
$15.7B
$2K ﹤0.01%
94
– –
RHI icon
4785
CALL
Robert Half
RHI
$4.07B
$2K ﹤0.01%
5
-96
-95% -$4.02K
RHI icon
4786
PUT
Robert Half
RHI
$4.07B
$2K ﹤0.01%
+54
New +$2.26K
RIGL icon
4787
CALL
Rigel Pharmaceuticals
RIGL
$692M
$2K ﹤0.01%
+5
New +$123
RLI icon
4788
CALL
RLI Corp
RLI
$5.88B
$2K ﹤0.01%
16
-4
-20% -$126
RMD icon
4789
CALL
ResMed
RMD
$29.5B
$2K ﹤0.01%
59
-83
-58% -$4.7K
RWT
4790
PUT
Redwood Trust
RWT
$619M
$2K ﹤0.01%
+135
New +$1.58K
SBAC icon
4791
PUT
SBA Communications
SBAC
$18.3B
$2K ﹤0.01%
+19
New +$1.81K
SBSW icon
4792
PUT
Sibanye-Stillwater
SBSW
$6.05B
$2K ﹤0.01%
+47
New +$508
SCHB icon
4793
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
$2K ﹤0.01%
180
-6
-3% -$47
SCS
4794
PUT
DELISTED
Steelcase
SCS
$2K ﹤0.01%
62
+55
+786% +$731
SLG icon
4795
PUT
SL Green Realty
SLG
$3.83B
$2K ﹤0.01%
1
– –
SNDA icon
4796
CALL
Sonida Senior Living
SNDA
$2.03B
$2K ﹤0.01%
+2
New +$521
SNPS icon
4797
PUT
Synopsys
SNPS
$74.5B
$2K ﹤0.01%
8
-3
-27% -$132
SO icon
4798
PUT
Southern Company
SO
$109B
$2K ﹤0.01%
53
-14
-21% -$682
SON icon
4799
PUT
Sonoco
SON
$5.8B
$2K ﹤0.01%
+110
New +$4.68K
STAA icon
4800
CALL
STAAR Surgical
STAA
$1.14B
$2K ﹤0.01%
+43
New +$291
190 191
192
193 194

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Simplex Trading's Q1 2016 Portfolio in Review

As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.

By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

  • Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
  • Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
  • Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
  • Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
  • Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
  • Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
  • Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.

Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.