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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
+5.12%
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
$1.5B
AUM Growth
+$242M
Cap. Flow
+$178M
Cap. Flow %
11.93%
Top 10 Hldgs %
18.61%
Holding
7,153
New
1,586
Increased
2,321
Reduced
1,709
Closed
1,363

Top Buys

Rank Stock Value
1
LNKD
LinkedIn Corporation
LNKD
+$21.4M
2
GLD icon
SPDR Gold Trust
GLD
+$17.3M
3
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
+$15M
4
BIIB icon
Biogen
BIIB
+$14.9M
5
V icon
Visa
V
+$14.1M

Top Sells

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$36.7M
2
GOOG icon
Alphabet (Google) Class C
GOOG
+$20.1M
3
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$15.8M
4
C icon
Citigroup
C
+$14.7M
5
MDY icon
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
+$13.1M

Sector Composition

Rank Sector Weight
1 Communication Services 6.61%
2 Healthcare 6.55%
3 Technology 6.45%
4 Consumer Discretionary 4.54%
5 Financials 4.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SB icon
6376
Safe Bulkers
SB
$781M
$0 ﹤0.01%
890
-12,100
-93% -$12.7K
SBAC icon
6377
PUT
SBA Communications
SBAC
$18.4B
– –
-19
Closed -$2K
SBRA icon
6378
Sabra Healthcare REIT
SBRA
$5.64B
– –
-977
Closed -$20.4K
SCHG icon
6379
Schwab US Large-Cap Growth ETF
SCHG
$58.5B
– –
-520
Closed -$3K
SCHL icon
6380
CALL
Scholastic
SCHL
$796M
– –
-39
Closed -$10K
SCHM icon
6381
Schwab US Mid-Cap ETF
SCHM
$14.6B
– –
-489
Closed -$6K
SCHW
6382
Charles Schwab
SCHW
$177B
– –
-20,189
Closed -$574K
SCOR icon
6383
Comscore
SCOR
$110M
– –
-330
Closed -$197K
SCS
6384
CALL
DELISTED
Steelcase
SCS
– –
-39
Closed -$1K
SHOE
6385
Shoe Station Group
SHOE
$395M
– –
-1,286
Closed -$16K
SEIC icon
6386
SEI Investments
SEIC
$11.9B
– –
-889
Closed -$38K
SIG icon
6387
Signet Jewelers
SIG
$3.55B
– –
-17,396
Closed -$1.77M
SIL icon
6388
Global X Silver Miners ETF NEW
SIL
$4.08B
– –
-5,311
Closed -$140K
SJT
6389
PUT
San Juan Basin Royalty Trust
SJT
$117M
– –
-17
Closed -$4K
SKM icon
6390
SK Telecom
SKM
$13.7B
– –
-1,063
Closed -$35.1K
SKT icon
6391
Tanger
SKT
$4.82B
– –
-1,035
Closed -$37.7K
SKT icon
6392
PUT
Tanger
SKT
$4.82B
– –
-17
Closed -$1K
SLG icon
6393
PUT
SL Green Realty
SLG
$3.88B
– –
-1
Closed -$2K
SLM icon
6394
SLM Corp
SLM
$4.57B
– –
-991
Closed -$6.46K
SLM icon
6395
PUT
SLM Corp
SLM
$4.57B
– –
-12
Closed -$3K
SM icon
6396
SM Energy
SM
$7.96B
– –
-9,761
Closed -$274K
SNDA icon
6397
CALL
Sonida Senior Living
SNDA
$1.97B
– –
-2
Closed -$2K
SNDA icon
6398
Sonida Senior Living
SNDA
$1.97B
– –
-139
Closed -$39.1K
SNEX icon
6399
StoneX
SNEX
$8.83B
– –
-1,002
Closed -$5K
SNN icon
6400
Smith & Nephew
SNN
$12.9B
– –
-834
Closed -$28.2K
254 255
256
257 258

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Simplex Trading's Q2 2016 Portfolio in Review

As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.

Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.

By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.

On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.

  • Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
  • Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
  • Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
  • Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
  • Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
  • Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.

Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.