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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$91.9B
AUM Growth
+$3.47B
Cap. Flow
-$603M
Cap. Flow %
-0.66%
Top 10 Hldgs %
34.1%
Holding
11,206
New
1,219
Increased
3,363
Reduced
4,368
Closed
1,941

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 Miscellaneous 98.19%
2 Consumer Discretionary 0.38%
3 Technology 0.35%
4 Communication Services 0.24%
5 Healthcare 0.2%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SNPE icon
10326
Xtrackers S&P 500 ESG ETF
SNPE
$2.97B
– –
-100
Closed -$3K
SNPS icon
10327
Synopsys
SNPS
$75.5B
– –
-291
Closed -$91.1K
SNT
10328
Senstar Technologies
SNT
$38.7M
– –
-75
Closed –
SNX icon
10329
TD Synnex
SNX
$21B
– –
-11,825
Closed -$1.11M
SO icon
10330
Southern Company
SO
$101B
– –
-17,253
Closed -$1.15M
SOGP
10331
Sound Group
SOGP
$49.9M
$0 ﹤0.01%
64
-1,113
-95% -$6.68K
SOXS icon
10332
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$1.33B
– –
-1
Closed -$159K
SPCK
10333
The SPAC and New Issue ETF
SPCK
$8.2M
– –
-8,749
Closed -$229K
SPEM icon
10334
State Street SPDR Portfolio Emerging Markets ETF
SPEM
$18B
– –
-21
Closed –
SPLB icon
10335
State Street SPDR Portfolio Long Term Corporate Bond ETF
SPLB
$1.24B
– –
-76
Closed -$1K
SPYM
10336
State Street SPDR Portfolio S&P 500 ETF
SPYM
$170B
– –
-2,529
Closed -$106K
SPLV icon
10337
Invesco S&P 500 Low Volatility ETF
SPLV
$7.12B
– –
-378
Closed -$21K
SPOK icon
10338
CALL
Spok Holdings
SPOK
$224M
– –
-17,400
Closed -$132K
SPRY icon
10339
PUT
ARS Pharmaceuticals
SPRY
$559M
– –
-19,700
Closed -$104K
SPSC icon
10340
CALL
SPS Commerce
SPSC
$2.99B
– –
-200
Closed -$24K
SPSC icon
10341
SPS Commerce
SPSC
$2.99B
– –
-41
Closed -$5K
SPSC icon
10342
PUT
SPS Commerce
SPSC
$2.99B
– –
-500
Closed -$62K
SPUU icon
10343
Direxion Daily S&P 500 Bull 2X ETF
SPUU
$290M
– –
-1
Closed –
SPWH icon
10344
Sportsman's Warehouse
SPWH
$50.9M
– –
-25,064
Closed -$230K
SPXC icon
10345
CALL
SPX Corp
SPXC
$9.84B
– –
-500
Closed -$27K
SQFT icon
10346
Presidio Property Trust
SQFT
$1.89M
$0 ﹤0.01%
+66
New +$744
SR icon
10347
CALL
Spire
SR
$4.89B
– –
-800
Closed -$49K
SRI icon
10348
Stoneridge
SRI
$213M
– –
-50
Closed –
SRI icon
10349
PUT
Stoneridge
SRI
$213M
– –
-100
Closed -$1K
SRS icon
10350
ProShares UltraShort Real Estate
SRS
$14.6M
– –
-912
Closed -$75K
412 413
414
415 416

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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, 3,363 increased, 4,368 reduced and 1,941 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 Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Consumer Discretionary and Technology.

  • 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 1,941 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.