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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
TSAT icon
10451
Telesat
TSAT
$599M
– –
-634
Closed -$4.93K
TSCO icon
10452
Tractor Supply
TSCO
$15.7B
– –
-19,925
Closed -$846K
TSE
10453
DELISTED
Trinseo
TSE
– –
-100
Closed -$2.2K
TSEM icon
10454
Tower Semiconductor
TSEM
$29.1B
– –
-200
Closed -$8.69K
TSHA icon
10455
Taysha Gene Therapies
TSHA
$1.65B
– –
-347
Closed -$703
TSN icon
10456
Tyson Foods
TSN
$19.8B
– –
-118,168
Closed -$7.69M
TTC icon
10457
CALL
Toro Company
TTC
$8.88B
– –
-200
Closed -$17K
TTEC icon
10458
PUT
TTEC Holdings
TTEC
$95.4M
– –
-1,600
Closed -$70K
TTGT icon
10459
CALL
TechTarget
TTGT
$257M
– –
-700
Closed -$41K
TTWO icon
10460
Take-Two Interactive
TTWO
$42.7B
– –
-18,428
Closed -$2M
TURN
10461
CALL
DELISTED
180 Degree Capital
TURN
– –
-6,000
Closed -$32K
TURN
10462
PUT
DELISTED
180 Degree Capital
TURN
– –
-300
Closed -$1K
TVTX icon
10463
Travere Therapeutics
TVTX
$5.22B
– –
-4,256
Closed -$90.2K
TXN icon
10464
Texas Instruments
TXN
$257B
– –
-153,940
Closed -$25.7M
TZA icon
10465
Direxion Daily Small Cap Bear 3x ETF
TZA
$211M
– –
-3,205
Closed -$1.47M
UAMY icon
10466
United States Antimony
UAMY
$836M
$0 ﹤0.01%
300
+100
+50% +$39
UBX
10467
DELISTED
Unity Biotechnology
UBX
– –
-2,997
Closed -$8.71K
UDMY
10468
DELISTED
Udemy
UDMY
– –
-60,112
Closed -$812K
UDOW icon
10469
ProShares UltraPro Dow 30
UDOW
$843M
– –
-68,614
Closed -$1.32M
UEC icon
10470
Uranium Energy
UEC
$4.82B
– –
-19,972
Closed -$75.8K
UGI icon
10471
UGI
UGI
$7.9B
– –
-1,567
Closed -$56.6K
UGL icon
10472
ProShares Ultra Gold
UGL
$648M
– –
-3,672
Closed -$43K
UHAL icon
10473
CALL
U-Haul Holding Co
UHAL
$14.1B
– –
-8,000
Closed -$407K
UHAL icon
10474
PUT
U-Haul Holding Co
UHAL
$14.1B
– –
-11,000
Closed -$560K
UHT
10475
Universal Health Realty Income Trust
UHT
$600M
– –
-1,281
Closed -$61.7K
417 418
419
420 421

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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.