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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
+26.79%
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
$77.2B
AUM Growth
+$3.66B
Cap. Flow
-$1.09B
Cap. Flow %
-1.41%
Top 10 Hldgs %
42.09%
Holding
9,568
New
1,711
Increased
3,402
Reduced
3,106
Closed
1,157

Top Buys

Rank Stock Value
1
BABA icon
Alibaba
BABA
+$39.9M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$39M
3
MA icon
Mastercard
MA
+$31.3M
4
AAPL icon
Apple
AAPL
+$25.3M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$25.1M

Top Sells

Rank Stock Value
1
JPM icon
JPMorgan Chase
JPM
+$52.8M
2
TSM icon
TSMC
TSM
+$43M
3
AMZN icon
Amazon
AMZN
+$24.7M
4
SLV icon
iShares Silver Trust
SLV
+$24.2M
5
NFLX icon
Netflix
NFLX
+$21.1M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.65%
2 Technology 0.37%
3 Healthcare 0.33%
4 Industrials 0.21%
5 Communication Services 0.19%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
KW
8726
DELISTED
Kennedy-Wilson Holdings
KW
– –
-7,751
Closed -$121K
KWEB icon
8727
KraneShares CSI China Internet ETF
KWEB
$5.2B
– –
-12,761
Closed -$870K
LAB icon
8728
Standard BioTools
LAB
$326M
– –
-29,761
Closed -$196K
LABD icon
8729
Direxion Daily S&P Biotech Bear 3X ETF
LABD
$65.4M
– –
-781
Closed -$465K
LAMR icon
8730
Lamar Advertising Co
LAMR
$16.2B
– –
-3,219
Closed -$241K
LAUR icon
8731
Laureate Education
LAUR
$5.18B
– –
-5,176
Closed -$73.1K
LCTX icon
8732
Lineage Cell Therapeutics
LCTX
$257M
– –
-13,014
Closed -$18.2K
TULP
8733
Bloomia Holdings
TULP
$18.2M
$0 ﹤0.01%
+71
New +$447
LECO icon
8734
Lincoln Electric
LECO
$13.8B
– –
-1,091
Closed -$119K
LECO icon
8735
PUT
Lincoln Electric
LECO
$13.8B
– –
-11
Closed -$101K
LEU icon
8736
Centrus Energy
LEU
$3.22B
– –
-283
Closed -$3.95K
LII icon
8737
Lennox International
LII
$18.8B
– –
-726
Closed -$206K
LITE icon
8738
CALL
Lumentum
LITE
$59.4B
– –
-453
Closed -$3.4M
LITE icon
8739
Lumentum
LITE
$59.4B
$0 ﹤0.01%
2,494
-34,473
-93% -$2.97M
LITE icon
8740
PUT
Lumentum
LITE
$59.4B
– –
-1,072
Closed -$8.05M
LKFN icon
8741
Lakeland Financial Corp
LKFN
$1.52B
– –
-177
Closed -$7K
LKFN icon
8742
PUT
Lakeland Financial Corp
LKFN
$1.52B
– –
-4
Closed -$16K
LLY icon
8743
Eli Lilly
LLY
$1.07T
– –
-59,071
Closed -$8.82M
LMNR icon
8744
CALL
Limoneira
LMNR
$237M
– –
-13
Closed -$18K
LNN icon
8745
PUT
Lindsay Corp
LNN
$1.16B
– –
-1
Closed -$9K
LNTH icon
8746
Lantheus
LNTH
$6.82B
– –
-2,543
Closed -$33.3K
LOB icon
8747
Live Oak Bancshares
LOB
$1.95B
– –
-2,819
Closed -$113K
LOGI icon
8748
Logitech
LOGI
$15.2B
– –
-16,431
Closed -$1.42M
LOPE icon
8749
Grand Canyon Education
LOPE
$3.71B
– –
-3,381
Closed -$289K
LOW icon
8750
Lowe's Companies
LOW
$116B
– –
-3,322
Closed -$540K
348 349
350
351 352

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Simplex Trading's Q4 2020 Portfolio in Review

As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.

Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
  • Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
  • Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
  • Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
  • Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
  • Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
  • Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.

Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.