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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
+6.46%
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
$122B
AUM Growth
+$7.84B
Cap. Flow
-$3.39B
Cap. Flow %
-2.78%
Top 10 Hldgs %
42.57%
Holding
10,535
New
1,474
Increased
3,350
Reduced
3,913
Closed
1,517

Top Buys

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$53.9M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$52.9M
3
NVDA icon
NVIDIA
NVDA
+$47.1M
4
PYPL icon
PayPal
PYPL
+$41.7M
5
GOOG icon
Alphabet (Google) Class C
GOOG
+$28.4M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$51.4M
2
WMT icon
Walmart Inc
WMT
+$46.4M
3
OIH icon
VanEck Oil Services ETF
OIH
+$34.2M
4
ADBE icon
Adobe
ADBE
+$33.5M
5
SBUX icon
Starbucks
SBUX
+$26.8M

Sector Composition

Rank Sector Weight
1 Technology 0.41%
2 Healthcare 0.21%
3 Consumer Discretionary 0.21%
4 Communication Services 0.2%
5 Financials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
UVE icon
10001
CALL
Universal Insurance Holdings
UVE
$1.06B
– –
-200
Closed -$3K
UVE icon
10002
Universal Insurance Holdings
UVE
$1.06B
– –
-922
Closed -$16K
UVE icon
10003
PUT
Universal Insurance Holdings
UVE
$1.06B
– –
-200
Closed -$3K
UVXY icon
10004
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$236M
– –
-240
Closed -$278K
UYG icon
10005
ProShares Ultra Financials
UYG
$803M
– –
-305
Closed -$12K
VAL icon
10006
Valaris
VAL
$5.46B
– –
-16,340
Closed -$985K
VANI icon
10007
Vivani Medical
VANI
$120M
$0 ﹤0.01%
+585
New +$720
VB icon
10008
Vanguard Small-Cap ETF
VB
$79.7B
– –
-62
Closed -$11K
VCEL icon
10009
PUT
Vericel Corp
VCEL
$2.28B
– –
-100
Closed -$2K
VEEV icon
10010
Veeva Systems
VEEV
$30B
– –
-11,401
Closed -$2.08M
VEGI icon
10011
iShares MSCI Agriculture Producers ETF
VEGI
$158M
$0 ﹤0.01%
20
-38
-66% -$1.51K
VERI icon
10012
Veritone
VERI
$105M
– –
-22,236
Closed -$97.1K
VERX icon
10013
CALL
Vertex
VERX
$1.79B
– –
-900
Closed -$18K
VERX icon
10014
PUT
Vertex
VERX
$1.79B
– –
-100
Closed -$2K
VFF icon
10015
PUT
Village Farms International
VFF
$242M
– –
-44,500
Closed -$36K
VGT icon
10016
Vanguard Information Technology ETF
VGT
$142B
– –
-139,592
Closed -$6.73M
VGZ icon
10017
PUT
Vista Gold
VGZ
$254M
– –
-3,700
Closed -$2K
VICR icon
10018
Vicor
VICR
$9.91B
– –
-4,067
Closed -$201K
VINP icon
10019
Vinci Compass Investments Ltd
VINP
$630M
$0 ﹤0.01%
+84
New +$713
VIOO icon
10020
Vanguard S&P Small-Cap 600 ETF
VIOO
$4.16B
– –
-2,872
Closed -$255K
VITL icon
10021
Vital Farms
VITL
$563M
– –
-5,573
Closed -$77.8K
VKTX icon
10022
Viking Therapeutics
VKTX
$4.33B
– –
-289,240
Closed -$6.06M
VLY icon
10023
Valley National Bancorp
VLY
$8.05B
– –
-18,065
Closed -$144K
VMBS icon
10024
Vanguard Mortgage-Backed Securities ETF
VMBS
$15.4B
– –
-1,619
Closed -$75K
VMEO
10025
DELISTED
Vimeo
VMEO
– –
-13,228
Closed -$50.1K
399 400
401
402 403

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Simplex Trading's Q2 2023 Portfolio in Review

As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.

By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
  • Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
  • Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
  • Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
  • Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
  • Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.

Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.