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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
TCPC icon
7876
BlackRock TCP Capital
TCPC
$268M
$0 ﹤0.01%
+48
New +$661
TCX icon
7877
Tucows
TCX
$105M
– –
-8,667
Closed -$452K
TDC icon
7878
Teradata
TDC
$2.64B
– –
-8,904
Closed -$300K
TEF
7879
DELISTED
Telefonica
TEF
– –
-7,902
Closed -$47.8K
TEL icon
7880
TE Connectivity
TEL
$58.5B
– –
-5,053
Closed -$465K
TENB icon
7881
CALL
Tenable Holdings
TENB
$3.62B
– –
-49
Closed -$139K
TFC icon
7882
Truist Financial
TFC
$63.2B
– –
-21,004
Closed -$1.04M
TFSL icon
7883
CALL
TFS Financial
TFSL
$5.12B
– –
-2
Closed -$3K
TFSL icon
7884
PUT
TFS Financial
TFSL
$5.12B
– –
-75
Closed -$135K
TFX icon
7885
Teleflex
TFX
$5.97B
– –
-549
Closed -$191K
TG icon
7886
PUT
Tredegar Corp
TG
$270M
– –
-12
Closed -$19K
TGNA
7887
DELISTED
TEGNA Inc
TGNA
– –
-3,657
Closed -$55.3K
THC icon
7888
Tenet Healthcare
THC
$16.8B
– –
-57,648
Closed -$1.23M
THD icon
7889
iShares MSCI Thailand ETF
THD
$361M
– –
-1,370
Closed -$130K
THRM icon
7890
Gentherm
THRM
$1.11B
– –
-50
Closed -$1.98K
THRM icon
7891
PUT
Gentherm
THRM
$1.11B
– –
-5
Closed -$20K
TILT icon
7892
CALL
FlexShares Morningstar US Market Factors Tilt Index Fund
TILT
$2.18B
– –
-30
Closed -$99K
TIMB icon
7893
CALL
TIM SA
TIMB
$10.5B
– –
-426
Closed -$637K
TIMB icon
7894
TIM SA
TIMB
$10.5B
– –
-347
Closed -$5K
TIP icon
7895
iShares TIPS Bond ETF
TIP
$14.5B
– –
-20,506
Closed -$2.37M
TITN icon
7896
Titan Machinery
TITN
$448M
– –
-10,859
Closed -$194K
TK icon
7897
Teekay
TK
$968M
– –
-246
Closed -$985
TKR icon
7898
PUT
Timken Company
TKR
$9.84B
– –
-2
Closed -$10K
TMHC icon
7899
Taylor Morrison
TMHC
$6.67B
– –
-100
Closed -$2.3K
TMQ
7900
Trilogy Metals
TMQ
$549M
– –
-7,888
Closed -$15.9K
314 315
316
317 318

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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.