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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
+2.11%
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
$36.6B
AUM Growth
+$674M
Cap. Flow
-$102M
Cap. Flow %
-0.28%
Top 10 Hldgs %
34.99%
Holding
8,406
New
1,261
Increased
2,604
Reduced
3,015
Closed
1,300

Top Buys

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$29.6M
2
XLI icon
State Street Industrial Select Sector SPDR ETF
XLI
+$22.6M
3
IWM icon
iShares Russell 2000 ETF
IWM
+$17.9M
4
NFLX icon
Netflix
NFLX
+$17.1M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$13.4M

Top Sells

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
2
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$40.6M
3
DIS icon
Walt Disney
DIS
+$25.6M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$13.5M
5
JNJ icon
Johnson & Johnson
JNJ
+$11.2M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.48%
2 Technology 0.51%
3 Communication Services 0.5%
4 Healthcare 0.37%
5 Industrials 0.31%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
UGL icon
7826
ProShares Ultra Gold
UGL
$875M
– –
-3,924
Closed -$36K
UHT
7827
Universal Health Realty Income Trust
UHT
$567M
– –
-42
Closed -$3K
UHT
7828
PUT
Universal Health Realty Income Trust
UHT
$567M
– –
-18
Closed -$136K
UNFI icon
7829
United Natural Foods
UNFI
$2.66B
– –
-13,341
Closed -$153K
UNH icon
7830
UnitedHealth
UNH
$356B
– –
-250
Closed -$60.1K
UNM icon
7831
Unum
UNM
$15.2B
– –
-20,737
Closed -$718K
UPRO icon
7832
ProShares UltraPro S&P 500
UPRO
$5.57B
– –
-15,240
Closed -$375K
UPLD icon
7833
Upland Software
UPLD
$10.9M
– –
-1,161
Closed -$532K
UPWK icon
7834
Upwork
UPWK
$1.1B
– –
-18,453
Closed -$318K
URE icon
7835
ProShares Ultra Real Estate
URE
$54.5M
– –
-353
Closed -$26K
URI icon
7836
United Rentals
URI
$62.9B
– –
-17,944
Closed -$2.28M
USL icon
7837
CALL
United States 12 Month Oil Fund,
USL
$45.5M
– –
-24
Closed -$54K
USMV icon
7838
iShares MSCI USA Min Vol Factor ETF
USMV
$24.1B
– –
-2,911
Closed -$171K
USNA icon
7839
Usana Health Sciences
USNA
$276M
– –
-3,600
Closed -$285K
USPH icon
7840
PUT
US Physical Therapy
USPH
$1.18B
– –
-7
Closed -$73K
UTHR icon
7841
United Therapeutics
UTHR
$20.9B
– –
-3,038
Closed -$284K
UTI icon
7842
Universal Technical Institute
UTI
$1.22B
$0 ﹤0.01%
200
+106
+113% +$359
UUP icon
7843
Invesco DB US Dollar Index Bullish Fund
UUP
$300M
– –
-63,438
Closed -$1.66M
UUUU icon
7844
Energy Fuels
UUUU
$3.83B
– –
-11,777
Closed -$35.5K
UXIN
7845
Uxin Ltd
UXIN
$255M
– –
-21
Closed -$5.54K
VAC icon
7846
Marriott Vacations Worldwide
VAC
$3.67B
$0 ﹤0.01%
+469
New +$46.3K
VANI icon
7847
Vivani Medical
VANI
$134M
– –
-42
Closed -$861
VANI icon
7848
PUT
Vivani Medical
VANI
$134M
– –
-1
Closed -$1K
VECO icon
7849
Veeco
VECO
$2.73B
– –
-1,276
Closed -$15.5K
VFC icon
7850
VF Corp
VFC
$5.29B
– –
-794
Closed -$68.4K
312 313
314
315 316

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Simplex Trading's Q2 2019 Portfolio in Review

As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,300 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.

By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
  • Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
  • Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
  • Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
  • Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
  • Simplex Trading opened 1,261 new positions and closed 1,300 in Q2 2019.
  • Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.

Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.