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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
-2.07%
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
$35.2B
AUM Growth
-$1.49B
Cap. Flow
-$310M
Cap. Flow %
-0.88%
Top 10 Hldgs %
32.67%
Holding
8,410
New
1,312
Increased
3,129
Reduced
2,596
Closed
1,163

Top Buys

Rank Stock Value
1
BABA icon
Alibaba
BABA
+$50.3M
2
BA icon
Boeing
BA
+$24.3M
3
GLD icon
SPDR Gold Trust
GLD
+$18.3M
4
BIIB icon
Biogen
BIIB
+$15.9M
5
FDX icon
FedEx
FDX
+$15.1M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$60.3M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$36.4M
3
NFLX icon
Netflix
NFLX
+$19M
4
XLI icon
State Street Industrial Select Sector SPDR ETF
XLI
+$17.3M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$14.2M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.49%
2 Technology 0.48%
3 Healthcare 0.35%
4 Industrials 0.35%
5 Communication Services 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TPIC
7901
DELISTED
TPI Composites
TPIC
– –
-8,841
Closed -$189K
TPVG icon
7902
PUT
TriplePoint Venture Growth BDC
TPVG
$186M
– –
-10
Closed -$14K
TR icon
7903
Tootsie Roll Industries
TR
$2.96B
– –
-3,793
Closed -$114K
TR icon
7904
PUT
Tootsie Roll Industries
TR
$2.96B
– –
-1
Closed -$3K
TRAK icon
7905
ReposiTrak
TRAK
$146M
– –
-151
Closed -$847
TREX icon
7906
Trex
TREX
$4.45B
– –
-4,342
Closed -$175K
TRIB
7907
Trinity Biotech
TRIB
$6.14M
$0 ﹤0.01%
+80
New +$695
TRIP icon
7908
TripAdvisor
TRIP
$1.61B
– –
-9,043
Closed -$377K
TRV icon
7909
Travelers Companies
TRV
$82.1B
– –
-1,287
Closed -$191K
TSE
7910
DELISTED
Trinseo
TSE
– –
-178
Closed -$6.63K
TTC icon
7911
PUT
Toro Company
TTC
$9.03B
– –
-5
Closed -$33K
TTI icon
7912
TETRA Technologies
TTI
$1.34B
– –
-8,604
Closed -$14K
TTI icon
7913
PUT
TETRA Technologies
TTI
$1.34B
– –
-100
Closed -$16K
TTMI icon
7914
TTM Technologies
TTMI
$15B
– –
-3,237
Closed -$33K
TTSH
7915
CALL
DELISTED
Tile Shop Holdings
TTSH
– –
-24
Closed -$9K
TTSH
7916
PUT
DELISTED
Tile Shop Holdings
TTSH
– –
-4
Closed -$1K
TTWO icon
7917
Take-Two Interactive
TTWO
$43.4B
– –
-7,838
Closed -$978K
TU icon
7918
Telus
TU
$15.9B
$0 ﹤0.01%
14
– –
TWO
7919
Two Harbors Investment
TWO
$1.27B
– –
-2,247
Closed -$119K
TXRH icon
7920
Texas Roadhouse
TXRH
$12.6B
– –
-21,990
Closed -$1.17M
TYL icon
7921
Tyler Technologies
TYL
$11.7B
– –
-77
Closed -$18.9K
UAL icon
7922
United Airlines
UAL
$38.1B
– –
-40,849
Closed -$3.61M
UBX
7923
CALL
DELISTED
Unity Biotechnology
UBX
– –
-8
Closed -$76K
UE icon
7924
Urban Edge Properties
UE
$2.92B
– –
-1,507
Closed -$26K
UE icon
7925
PUT
Urban Edge Properties
UE
$2.92B
– –
-2
Closed -$3K
315 316
317
318 319

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Simplex Trading's Q3 2019 Portfolio in Review

As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.

Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
  • Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
  • Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
  • Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
  • Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
  • Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
  • Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.

Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.