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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
LNSR icon
9851
PUT
LENSAR
LNSR
$68.8M
– –
-900
Closed -$4K
LNTH icon
9852
Lantheus
LNTH
$6.82B
– –
-5,524
Closed -$341K
LNW
9853
DELISTED
Light & Wonder
LNW
– –
-4,921
Closed -$282K
LOAN
9854
CALL
Manhattan Bridge Capital
LOAN
$45.4M
– –
-600
Closed -$3K
LOAN
9855
Manhattan Bridge Capital
LOAN
$45.4M
$0 ﹤0.01%
+99
New +$549
LOB icon
9856
PUT
Live Oak Bancshares
LOB
$1.95B
– –
-700
Closed -$21K
LOCO icon
9857
El Pollo Loco
LOCO
$485M
– –
-1,396
Closed -$14.5K
LOCO icon
9858
PUT
El Pollo Loco
LOCO
$485M
– –
-600
Closed -$5K
LOOP icon
9859
CALL
Loop Industries
LOOP
$38.9M
– –
-1,300
Closed -$5K
LOOP icon
9860
Loop Industries
LOOP
$38.9M
– –
-649
Closed -$1.89K
LOPE icon
9861
CALL
Grand Canyon Education
LOPE
$3.71B
– –
-300
Closed -$24K
LPL icon
9862
LG Display
LPL
$3.17B
– –
-2,025
Closed -$10.3K
LRCX icon
9863
Lam Research
LRCX
$382B
– –
-136,530
Closed -$5.71M
LRMR icon
9864
Larimar Therapeutics
LRMR
$416M
$0 ﹤0.01%
103
-203
-66% -$693
LSAK icon
9865
CALL
Lesaka Technologies
LSAK
$388M
– –
-3,300
Closed -$11K
LTBR icon
9866
CALL
Lightbridge
LTBR
$246M
– –
-2,500
Closed -$11K
LTBR icon
9867
Lightbridge
LTBR
$246M
$0 ﹤0.01%
+129
New +$608
LTRN icon
9868
Lantern Pharma
LTRN
$35.1M
– –
-373
Closed -$1K
LTRN icon
9869
PUT
Lantern Pharma
LTRN
$35.1M
– –
-15,900
Closed -$76K
LTRX icon
9870
Lantronix
LTRX
$236M
– –
-789
Closed -$3.71K
SEGG
9871
CALL
Sports Entertainment Gaming Global Corp
SEGG
$14.4M
– –
-267
Closed -$11K
LU icon
9872
Lufax Holding
LU
$1.2B
– –
-96,614
Closed -$736K
LVLU icon
9873
CALL
Lulu's Fashion Lounge
LVLU
$55M
– –
-20
Closed -$1K
LVLU icon
9874
Lulu's Fashion Lounge
LVLU
$55M
– –
-519
Closed -$35K
LVS icon
9875
Las Vegas Sands
LVS
$30.5B
– –
-272,569
Closed -$11.6M
393 394
395
396 397

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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.