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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
-6.21%
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
$56.7B
AUM Growth
+$11B
Cap. Flow
+$439M
Cap. Flow %
0.77%
Top 10 Hldgs %
50.41%
Holding
8,783
New
1,511
Increased
3,249
Reduced
2,705
Closed
1,159

Top Buys

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$31.6M
2
SLV icon
iShares Silver Trust
SLV
+$28.1M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.1M
4
JPM icon
JPMorgan Chase
JPM
+$24.5M
5
JNUG icon
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
+$24M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$51.6M
2
AMZN icon
Amazon
AMZN
+$47.4M
3
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$44.7M
4
NFLX icon
Netflix
NFLX
+$38.3M
5
NVDA icon
NVIDIA
NVDA
+$31.1M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.1%
2 Technology 0.49%
3 Consumer Discretionary 0.33%
4 Healthcare 0.33%
5 Financials 0.16%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GXC icon
7826
State Street SPDR S&P China ETF
GXC
$473M
– –
-6
Closed –
COLO
7827
Global X MSCI Colombia ETF
COLO
$226M
$0 ﹤0.01%
+25
New +$830
HACK icon
7828
Amplify Cybersecurity ETF
HACK
$2.88B
– –
-100
Closed -$4K
HAE icon
7829
Haemonetics
HAE
$4.68B
– –
-396
Closed -$42.9K
HCC icon
7830
Warrior Met Coal
HCC
$5.52B
– –
-6,055
Closed -$109K
HCI icon
7831
CALL
HCI Group
HCI
$2.33B
– –
-52
Closed -$237K
HCI icon
7832
PUT
HCI Group
HCI
$2.33B
– –
-11
Closed -$50K
HCSG icon
7833
PUT
Healthcare Services Group
HCSG
$1.5B
– –
-13
Closed -$31K
HEI icon
7834
HEICO Corp
HEI
$45.5B
– –
-1,616
Closed -$184K
HELE icon
7835
Helen of Troy
HELE
$661M
– –
-451
Closed -$76.4K
HESM icon
7836
Hess Midstream
HESM
$5.12B
– –
-1,255
Closed -$23.6K
HIG icon
7837
Hartford Financial Services
HIG
$37.5B
– –
-11,216
Closed -$584K
HII icon
7838
Huntington Ingalls Industries
HII
$11.3B
– –
-112
Closed -$26.1K
HIW icon
7839
PUT
Highwoods Properties
HIW
$3.44B
– –
-1
Closed -$4K
HLIO icon
7840
CALL
Helios Technologies
HLIO
$2.36B
– –
-30
Closed -$138K
HLIO icon
7841
Helios Technologies
HLIO
$2.36B
– –
-1,353
Closed -$62K
HLI icon
7842
CALL
Houlihan Lokey
HLI
$9.58B
– –
-1
Closed -$4K
HOS
7843
Hornbeck Offshore Services, Inc.
HOS
$1.36B
$0 ﹤0.01%
381
-1,688
-82% -$11.1K
HMN icon
7844
Horace Mann Educators
HMN
$2.06B
– –
-482
Closed -$21K
HMY icon
7845
Harmony Gold Mining
HMY
$12.7B
– –
-150,061
Closed -$493K
HNI icon
7846
HNI Corp
HNI
$3.58B
$0 ﹤0.01%
+21
New +$698
HOFT icon
7847
CALL
Hooker Furnishings Corp
HOFT
$141M
– –
-2
Closed -$5K
HOFT icon
7848
Hooker Furnishings Corp
HOFT
$141M
– –
-577
Closed -$11.9K
HON icon
7849
Honeywell
HON
$66.4B
– –
-24,467
Closed -$3.78M
HPP
7850
Hudson Pacific Properties
HPP
$684M
– –
-8
Closed -$2K
312 313
314
315 316

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Simplex Trading's Q1 2020 Portfolio in Review

As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Simplex Trading's Q1 2020 filing shows 1,511 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
  • Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
  • Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
  • Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
  • Simplex Trading opened 1,511 new positions and closed 1,159 in Q1 2020.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.

Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.