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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
-6.21%
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
$56.7B
AUM Growth
+$11B
Cap. Flow
+$631M
Cap. Flow %
1.11%
Top 10 Hldgs %
50.41%
Holding
8,783
New
1,512
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 Technology 0.49%
2 Healthcare 0.33%
3 Consumer Discretionary 0.32%
4 Financials 0.16%
5 Communication Services 0.16%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
KB icon
7901
KB Financial Group
KB
$42.5B
– –
-243
Closed -$10K
KB icon
7902
PUT
KB Financial Group
KB
$42.5B
– –
-1
Closed -$4K
KBH icon
7903
KB Home
KBH
$3.38B
– –
-17,731
Closed -$568K
KBR icon
7904
KBR
KBR
$4.56B
– –
-13,426
Closed -$347K
KCE icon
7905
State Street SPDR S&P Capital Markets ETF
KCE
$447M
– –
-287
Closed -$17K
KEP icon
7906
CALL
Korea Electric Power
KEP
$15.4B
– –
-1
Closed -$1K
KEY icon
7907
KeyCorp
KEY
$24.3B
– –
-7,900
Closed -$131K
KEYS icon
7908
Keysight
KEYS
$55.7B
– –
-24,369
Closed -$2.31M
KFRC icon
7909
Kforce
KFRC
$1.01B
– –
-1,732
Closed -$57.5K
KIDS icon
7910
CALL
OrthoPediatrics
KIDS
$478M
– –
-2
Closed -$9K
KKR icon
7911
KKR & Co
KKR
$85.8B
– –
-20,695
Closed -$594K
KLAC icon
7912
KLA
KLAC
$281B
– –
-28,230
Closed -$455K
KLXE icon
7913
KLX Energy Services
KLXE
$49.7M
– –
-3,657
Closed -$117K
KLXE icon
7914
PUT
KLX Energy Services
KLXE
$49.7M
– –
0
– -$1K
KMX icon
7915
CarMax
KMX
$8.16B
$0 ﹤0.01%
3
-1,127
-100% -$95.4K
KNOP icon
7916
KNOT Offshore Partners
KNOP
$362M
– –
-2,160
Closed -$36.3K
KNX icon
7917
Knight Transportation
KNX
$11.7B
– –
-15,146
Closed -$536K
KODK icon
7918
PUT
Kodak
KODK
$783M
– –
-83
Closed -$38K
KOD icon
7919
Kodiak Sciences
KOD
$2.55B
– –
-158
Closed -$9.48K
KOD icon
7920
PUT
Kodiak Sciences
KOD
$2.55B
– –
-1
Closed -$7K
KOS icon
7921
Kosmos Energy
KOS
$1.62B
– –
-3,497
Closed -$13.9K
KOS icon
7922
PUT
Kosmos Energy
KOS
$1.62B
– –
-18
Closed -$10K
KPTI icon
7923
Karyopharm Therapeutics
KPTI
$160M
– –
-1,735
Closed -$479K
KRG icon
7924
Kite Realty
KRG
$5.87B
– –
-1,135
Closed -$18.2K
KRNY icon
7925
CALL
Kearny Financial
KRNY
$571M
– –
-200
Closed -$276K
315 316
317
318 319

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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 1,512 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 Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare 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 1,512 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.