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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
JKHY icon
9776
PUT
Jack Henry & Associates
JKHY
$10.7B
– –
-400
Closed -$72K
JKS
9777
JinkoSolar
JKS
$775M
– –
-37,271
Closed -$1.8M
JNK icon
9778
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.24B
– –
-130,355
Closed -$11.5M
JPM icon
9779
JPMorgan Chase
JPM
$939B
– –
-538,019
Closed -$68.2M
JPST icon
9780
JPMorgan Ultra-Short Income ETF
JPST
$40B
– –
-100
Closed -$5K
JSML icon
9781
PUT
Janus Henderson Small Cap Growth Alpha ETF
JSML
$366M
– –
-2,800
Closed -$137K
JSPR icon
9782
Jasper Therapeutics
JSPR
$22.9M
– –
-100
Closed -$669
JYNT icon
9783
The Joint Corp
JYNT
$119M
– –
-901
Closed -$13.9K
KALA icon
9784
KALA BIO
KALA
$11.8M
– –
-12
Closed -$6K
KALA icon
9785
PUT
KALA BIO
KALA
$11.8M
– –
-3
Closed -$20K
KALU icon
9786
Kaiser Aluminum
KALU
$2.67B
– –
-234
Closed -$18.7K
KALU icon
9787
PUT
Kaiser Aluminum
KALU
$2.67B
– –
-600
Closed -$36K
KBE icon
9788
State Street SPDR S&P Bank ETF
KBE
$1.64B
– –
-13,459
Closed -$596K
KBR icon
9789
KBR
KBR
$4.68B
– –
-6,759
Closed -$336K
KBR icon
9790
PUT
KBR
KBR
$4.68B
– –
-100
Closed -$4K
KBWD icon
9791
Invesco KBW High Dividend Yield Financial ETF
KBWD
$408M
– –
-563
Closed -$7K
KCCA icon
9792
KraneShares California Carbon Allowance Strategy ETF
KCCA
$114M
– –
-5
Closed –
KE
9793
Kimball Electronics
KE
$598M
– –
-224
Closed -$3K
KE
9794
PUT
Kimball Electronics
KE
$598M
– –
-1,000
Closed -$17K
KELYA icon
9795
CALL
Kelly Services Class A
KELYA
$526M
– –
-200
Closed -$2K
KEP icon
9796
Korea Electric Power
KEP
$15.5B
– –
-90
Closed -$640
KEX icon
9797
CALL
Kirby Corp
KEX
$7.95B
– –
-1,600
Closed -$97K
KEY icon
9798
KeyCorp
KEY
$24.3B
– –
-31,272
Closed -$550K
KFY icon
9799
CALL
Korn Ferry
KFY
$3.98B
– –
-100
Closed -$4K
KINS icon
9800
CALL
Kingstone Companies
KINS
$288M
– –
-800
Closed -$2K
390 391
392
393 394

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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.