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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
+4.52%
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
$2.3B
AUM Growth
-$8.99M
Cap. Flow
-$114M
Cap. Flow %
-4.94%
Top 10 Hldgs %
22.88%
Holding
7,527
New
1,408
Increased
2,202
Reduced
2,320
Closed
1,474

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$83.1M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$37.2M
3
AMGN icon
Amgen
AMGN
+$30.5M
4
MU icon
Micron Technology
MU
+$28.8M
5
QCOM icon
Qualcomm
QCOM
+$18.2M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$29.5M
2
GS icon
Goldman Sachs
GS
+$27.8M
3
GILD icon
Gilead Sciences
GILD
+$27.6M
4
BKNG icon
Booking.com
BKNG
+$25.4M
5
T icon
AT&T
T
+$19.6M

Sector Composition

Rank Sector Weight
1 Technology 13.55%
2 Communication Services 11.57%
3 Consumer Discretionary 9.69%
4 Healthcare 7.28%
5 Financials 4.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
NGG icon
6551
National Grid
NGG
$81.9B
– –
-7,116
Closed -$435K
NGNE icon
6552
Neurogene
NGNE
$689M
– –
-109
Closed -$31.2K
NGVT icon
6553
Ingevity
NGVT
$2.58B
– –
-329
Closed -$19.4K
NHTC icon
6554
Natural Health Trends
NHTC
$15.2M
– –
-2,836
Closed -$81K
NKE icon
6555
Nike
NKE
$62B
– –
-81,770
Closed -$4.41M
NMFC icon
6556
PUT
New Mountain Finance
NMFC
$640M
– –
-61
Closed -$1K
NMIH icon
6557
NMI Holdings
NMIH
$3.22B
– –
-9,077
Closed -$102K
NMM icon
6558
CALL
Navios Maritime Partners
NMM
$2.25B
– –
-8
Closed -$1K
NMM icon
6559
Navios Maritime Partners
NMM
$2.25B
– –
-342
Closed -$9.18K
NMM icon
6560
PUT
Navios Maritime Partners
NMM
$2.25B
– –
-7
Closed -$8K
NPO icon
6561
CALL
Enpro
NPO
$7.15B
– –
-50
Closed -$6K
NPO icon
6562
PUT
Enpro
NPO
$7.15B
– –
-125
Closed -$7K
NRP icon
6563
CALL
Natural Resource Partners
NRP
$1.3B
– –
-53
Closed -$1K
NRT
6564
North European Oil Royalty Trust
NRT
$80.9M
– –
-280
Closed -$2K
NSA
6565
CALL
DELISTED
National Storage Affiliates Trust
NSA
– –
-26
Closed -$1K
NSIT icon
6566
Insight Enterprises
NSIT
$3.57B
– –
-100
Closed -$4.22K
NTCT icon
6567
CALL
NETSCOUT
NTCT
$2.86B
– –
-47
Closed -$2K
NTGR icon
6568
PUT
NETGEAR
NTGR
$681M
– –
-85
Closed -$40K
NTLA icon
6569
Intellia Therapeutics
NTLA
$1.53B
– –
-5,920
Closed -$82.7K
NTRA icon
6570
Natera
NTRA
$37.7B
– –
-1,311
Closed -$12.8K
NTRA icon
6571
PUT
Natera
NTRA
$37.7B
– –
-15
Closed -$1K
NUS icon
6572
Nu Skin
NUS
$247M
– –
-11,436
Closed -$652K
NVS icon
6573
Novartis
NVS
$296B
– –
-14,938
Closed -$1.06M
NWL icon
6574
Newell Brands
NWL
$2.14B
– –
-9,359
Closed -$475K
NWN icon
6575
CALL
Northwest Natural Holdings
NWN
$2.17B
– –
-16
Closed -$1K
261 262
263
264 265

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Simplex Trading's Q2 2017 Portfolio in Review

As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.

By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.

  • Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
  • Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
  • Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
  • Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
  • Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
  • Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
  • Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.

Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.