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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
-4.36%
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
$156B
AUM Growth
-$22.4B
Cap. Flow
-$7.93B
Cap. Flow %
-5.08%
Top 10 Hldgs %
50.56%
Holding
10,070
New
1,566
Increased
3,139
Reduced
3,654
Closed
1,547

Top Buys

Rank Stock Value
1
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$272M
2
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$99M
3
NVDA icon
NVIDIA
NVDA
+$89.9M
4
TSM icon
TSMC
TSM
+$87.7M
5
AMZN icon
Amazon
AMZN
+$61M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$518M
2
MSTR icon
Strategy Inc
MSTR
+$81.2M
3
BABA icon
Alibaba
BABA
+$66.7M
4
AMD icon
Advanced Micro Devices
AMD
+$44.3M
5
UBER icon
Uber
UBER
+$41.3M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Consumer Discretionary 0.22%
3 Healthcare 0.17%
4 Communication Services 0.15%
5 Financials 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TIPT icon
9676
Tiptree Inc
TIPT
$671M
– –
-67
Closed -$1.43K
TIXT
9677
DELISTED
TELUS International
TIXT
– –
-734
Closed -$2.45K
TKC icon
9678
Turkcell
TKC
$5.11B
– –
-187
Closed -$1.32K
TLPH icon
9679
Talphera
TLPH
$67M
– –
-363
Closed –
TLS icon
9680
PUT
Telos
TLS
$335M
– –
-9,100
Closed -$31K
TLYS icon
9681
Tilly's
TLYS
$116M
– –
-775
Closed -$3K
TMCI icon
9682
Treace Medical Concepts
TMCI
$258M
– –
-64,117
Closed -$576K
TMCI icon
9683
PUT
Treace Medical Concepts
TMCI
$258M
– –
-500
Closed -$3K
TMF icon
9684
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.24B
– –
-10,077
Closed -$402K
TNET icon
9685
TriNet
TNET
$2.76B
– –
-20,438
Closed -$1.7M
TNYA icon
9686
PUT
Tenaya Therapeutics
TNYA
$171M
– –
-16,700
Closed -$23K
TOKE
9687
DELISTED
Cambria Cannabis ETF
TOKE
$0 ﹤0.01%
+147
New +$712
TOON icon
9688
CALL
Kartoon Studios
TOON
$35.4M
– –
-9,600
Closed -$3K
TORO icon
9689
CALL
Toro Corp
TORO
$173M
– –
-400
Closed -$1K
TOWN icon
9690
CALL
Towne Bank
TOWN
$3.29B
– –
-100
Closed -$3K
TOWN icon
9691
PUT
Towne Bank
TOWN
$3.29B
– –
-200
Closed -$6K
TPH
9692
DELISTED
Tri Pointe Homes
TPH
– –
-2,422
Closed -$82.7K
TPST icon
9693
CALL
Tempest Therapeutics
TPST
$15.2M
– –
-638
Closed -$6K
TPVG icon
9694
TriplePoint Venture Growth BDC
TPVG
$186M
– –
-14,346
Closed -$110K
TRAK icon
9695
ReposiTrak
TRAK
$146M
– –
-2,239
Closed -$46.3K
TRC icon
9696
Tejon Ranch
TRC
$482M
$0 ﹤0.01%
39
-758
-95% -$12.1K
TRC icon
9697
PUT
Tejon Ranch
TRC
$482M
– –
-1,000
Closed -$15K
TRDA icon
9698
PUT
Entrada Therapeutics
TRDA
$239M
– –
-1,900
Closed -$32K
TREE icon
9699
LendingTree
TREE
$578M
– –
-8,527
Closed -$380K
TREX icon
9700
Trex
TREX
$4.45B
– –
-590
Closed -$38.3K
386 387
388
389 390

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Simplex Trading's Q1 2025 Portfolio in Review

As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.

Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.

Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.

  • Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
  • Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
  • Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
  • Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
  • Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
  • Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
  • Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.

Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.