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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
LCUT icon
9826
PUT
Lifetime Brands
LCUT
$199M
– –
-14,700
Closed -$99K
LDOS icon
9827
Leidos
LDOS
$14.1B
– –
-5,284
Closed -$541K
LDTC
9828
DELISTED
LeddarTech
LDTC
$0 ﹤0.01%
2
– –
LE icon
9829
Lands' End
LE
$361M
– –
-7,081
Closed -$64.9K
LEGH icon
9830
CALL
Legacy Housing
LEGH
$630M
– –
-100
Closed -$1K
LEU icon
9831
Centrus Energy
LEU
$3.22B
– –
-2,307
Closed -$88K
LFUS icon
9832
CALL
Littelfuse
LFUS
$10.2B
– –
-300
Closed -$59K
LFVN icon
9833
LifeVantage
LFVN
$82.4M
$0 ﹤0.01%
43
-308
-88% -$1.17K
LGND icon
9834
CALL
Ligand Pharmaceuticals
LGND
$6.02B
– –
-1,603
Closed -$86K
LGND icon
9835
PUT
Ligand Pharmaceuticals
LGND
$6.02B
– –
-802
Closed -$43K
LGO
9836
Largo
LGO
$62.8M
– –
-4,596
Closed -$25.3K
LHX icon
9837
L3Harris
LHX
$55.9B
– –
-4,553
Closed -$1.03M
LIDR icon
9838
AEye
LIDR
$52.3M
$0 ﹤0.01%
+45
New +$1.17K
LIDR icon
9839
PUT
AEye
LIDR
$52.3M
– –
-150
Closed -$4K
LILA icon
9840
Liberty Latin America Class A
LILA
$1.51B
– –
-1,936
Closed -$8K
LIN icon
9841
Linde
LIN
$237B
– –
-57,291
Closed -$18M
LINC icon
9842
Lincoln Educational Services
LINC
$1.29B
$0 ﹤0.01%
20
– –
LIQT icon
9843
LiqTech
LIQT
$21.5M
– –
-476
Closed -$1K
LIVN icon
9844
CALL
LivaNova
LIVN
$4.3B
– –
-800
Closed -$40K
LIVN icon
9845
PUT
LivaNova
LIVN
$4.3B
– –
-1,700
Closed -$86K
LKQ icon
9846
LKQ Corp
LKQ
$6.58B
– –
-18,294
Closed -$967K
LLY icon
9847
Eli Lilly
LLY
$1.07T
– –
-1,748
Closed -$620K
LMBS icon
9848
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
$6.32B
– –
-100
Closed -$4K
LMB icon
9849
Limbach Holdings
LMB
$867M
– –
-2,031
Closed -$19.3K
LNSR icon
9850
LENSAR
LNSR
$68.8M
– –
-800
Closed -$3.31K
392 393
394
395 396

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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.