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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
-4.08%
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
$127B
AUM Growth
+$5.5B
Cap. Flow
+$11.9B
Cap. Flow %
9.37%
Top 10 Hldgs %
44.01%
Holding
10,417
New
1,399
Increased
3,690
Reduced
3,364
Closed
1,719

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$113M
2
GLD icon
SPDR Gold Trust
GLD
+$68.6M
3
NVDA icon
NVIDIA
NVDA
+$63.4M
4
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$55.2M
5
AAPL icon
Apple
AAPL
+$54.9M

Top Sells

Rank Stock Value
1
NFLX icon
Netflix
NFLX
+$27.1M
2
QCOM icon
Qualcomm
QCOM
+$24.6M
3
DIS icon
Walt Disney
DIS
+$21.2M
4
AMD icon
Advanced Micro Devices
AMD
+$18.2M
5
SNOW icon
Snowflake
SNOW
+$16.1M

Sector Composition

Rank Sector Weight
1 Technology 0.44%
2 Consumer Discretionary 0.32%
3 Healthcare 0.22%
4 Financials 0.17%
5 Communication Services 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TERN
9801
PUT
DELISTED
Terns Pharmaceuticals
TERN
– –
-8,600
Closed -$75K
TG icon
9802
CALL
Tredegar Corp
TG
$270M
– –
-900
Closed -$6K
TGI
9803
PUT
DELISTED
Triumph Group
TGI
– –
-200
Closed -$2K
TGLS icon
9804
Tecnoglass
TGLS
$2.01B
– –
-4,973
Closed -$203K
THR
9805
DELISTED
Thermon Group Holdings
THR
– –
-632
Closed -$17K
TIGO icon
9806
CALL
Millicom
TIGO
$16.4B
– –
-2,900
Closed -$44K
TIGR
9807
UP Fintech Holding
TIGR
$897M
– –
-77,863
Closed -$315K
TIMB icon
9808
CALL
TIM SA
TIMB
$10.5B
– –
-800
Closed -$12K
TIMB icon
9809
TIM SA
TIMB
$10.5B
– –
-161
Closed -$2K
TIMB icon
9810
PUT
TIM SA
TIMB
$10.5B
– –
-100
Closed -$1K
TIP icon
9811
iShares TIPS Bond ETF
TIP
$14.5B
– –
-255
Closed -$27K
TIPT icon
9812
CALL
Tiptree Inc
TIPT
$671M
– –
-200
Closed -$3K
TITN icon
9813
Titan Machinery
TITN
$448M
– –
-3,566
Closed -$105K
TKC icon
9814
PUT
Turkcell
TKC
$5.11B
– –
-300
Closed -$1K
TKR icon
9815
Timken Company
TKR
$9.84B
– –
-9,243
Closed -$750K
TLH icon
9816
iShares 10-20 Year Treasury Bond ETF
TLH
$11B
$0 ﹤0.01%
+1
New +$105
TLPH icon
9817
CALL
Talphera
TLPH
$67M
– –
-1,100
Closed -$1K
TLPH icon
9818
Talphera
TLPH
$67M
– –
-6,207
Closed -$5.93K
TLPH icon
9819
PUT
Talphera
TLPH
$67M
– –
-10,000
Closed -$11K
TLRY icon
9820
Tilray
TLRY
$514M
– –
-8
Closed -$189
TLS icon
9821
Telos
TLS
$335M
– –
-135
Closed -$310
TLSA icon
9822
Tiziana Life Sciences
TLSA
$120M
$0 ﹤0.01%
75
-287
-79% -$198
TMHC icon
9823
PUT
Taylor Morrison
TMHC
$6.67B
– –
-20,400
Closed -$994K
TMQ
9824
Trilogy Metals
TMQ
$549M
– –
-89
Closed –
TNET icon
9825
TriNet
TNET
$2.76B
– –
-15,743
Closed -$1.66M
391 392
393
394 395

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Simplex Trading's Q3 2023 Portfolio in Review

As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.

Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.

By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.

On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.

  • Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
  • Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
  • Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
  • Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
  • Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
  • Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
  • Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.

Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.