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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
+6.28%
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
$91.9B
AUM Growth
+$3.47B
Cap. Flow
+$1.91B
Cap. Flow %
2.08%
Top 10 Hldgs %
34.1%
Holding
11,206
New
1,219
Increased
3,365
Reduced
4,370
Closed
1,942

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$170M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$71.3M
3
T icon
AT&T
T
+$44.2M
4
META icon
Meta Platforms (Facebook)
META
+$37.1M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$34.4M

Top Sells

Rank Stock Value
1
MSFT icon
Microsoft
MSFT
+$94.3M
2
JPM icon
JPMorgan Chase
JPM
+$68.2M
3
C icon
Citigroup
C
+$62.8M
4
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$50.9M
5
GLD icon
SPDR Gold Trust
GLD
+$46.3M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.38%
2 Technology 0.35%
3 Communication Services 0.24%
4 Healthcare 0.2%
5 Consumer Staples 0.13%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BNDX icon
9226
PUT
Vanguard Total International Bond ETF
BNDX
$82B
– –
-400
Closed -$19K
BNED icon
9227
CALL
Barnes & Noble Education
BNED
$412M
– –
-6
Closed -$1K
BNTC icon
9228
Benitec Biopharma
BNTC
$394M
– –
-6
Closed –
BOC icon
9229
Boston Omaha
BOC
$429M
$0 ﹤0.01%
+6
New +$157
BOC icon
9230
PUT
Boston Omaha
BOC
$429M
– –
-200
Closed -$4K
BOKF icon
9231
PUT
BOK Financial
BOKF
$8.64B
– –
-100
Closed -$8K
BOOT icon
9232
Boot Barn
BOOT
$4.55B
– –
-34,024
Closed -$2.04M
BP icon
9233
BP
BP
$113B
– –
-354,469
Closed -$11.8M
BPT
9234
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
– –
-5,303
Closed -$69.2K
BRC icon
9235
Brady Corp
BRC
$4.45B
– –
-100
Closed -$4.58K
BRC icon
9236
PUT
Brady Corp
BRC
$4.45B
– –
-100
Closed -$4K
BRFS
9237
DELISTED
BRF SA
BRFS
– –
-13,398
Closed -$27.8K
BRK.B icon
9238
Berkshire Hathaway Class B
BRK.B
$1.07T
– –
-171,339
Closed -$50.9M
BRO icon
9239
PUT
Brown & Brown
BRO
$22.9B
– –
-100
Closed -$6K
BROS icon
9240
Dutch Bros
BROS
$8.78B
– –
-213,575
Closed -$7.06M
BRZE icon
9241
Braze
BRZE
$2.45B
– –
-2,201
Closed -$61.4K
BRZU icon
9242
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$100M
– –
-6,752
Closed -$490K
BSBR icon
9243
Santander
BSBR
$39.7B
$0 ﹤0.01%
89
-68
-43% -$373
BSET icon
9244
PUT
Bassett Furniture
BSET
$169M
– –
-1,100
Closed -$17K
BURL icon
9245
Burlington
BURL
$22B
– –
-3,158
Closed -$504K
BURU
9246
DELISTED
NUBURU INC
BURU
– –
0
– –
BV icon
9247
BrightView Holdings
BV
$1.31B
$0 ﹤0.01%
+108
New +$833
BWMX icon
9248
Betterware México
BWMX
$623M
$0 ﹤0.01%
+63
New +$449
BWX icon
9249
State Street SPDR Bloomberg International Treasury Bond ETF
BWX
$1.32B
– –
-683
Closed -$14K
BYD icon
9250
Boyd Gaming
BYD
$6.47B
– –
-11,669
Closed -$657K
368 369
370
371 372

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Simplex Trading's Q4 2022 Portfolio in Review

As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.

Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
  • Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
  • Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
  • Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
  • Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
  • Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
  • Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.

Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.