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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
-6.21%
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
$56.7B
AUM Growth
+$11B
Cap. Flow
+$439M
Cap. Flow %
0.77%
Top 10 Hldgs %
50.41%
Holding
8,783
New
1,511
Increased
3,249
Reduced
2,705
Closed
1,159

Top Buys

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$31.6M
2
SLV icon
iShares Silver Trust
SLV
+$28.1M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.1M
4
JPM icon
JPMorgan Chase
JPM
+$24.5M
5
JNUG icon
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
+$24M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$51.6M
2
AMZN icon
Amazon
AMZN
+$47.4M
3
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$44.7M
4
NFLX icon
Netflix
NFLX
+$38.3M
5
NVDA icon
NVIDIA
NVDA
+$31.1M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.1%
2 Technology 0.49%
3 Consumer Discretionary 0.33%
4 Healthcare 0.33%
5 Financials 0.16%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BDN
7576
CALL
Brandywine Realty Trust
BDN
$537M
– –
-10
Closed -$15K
BDN
7577
PUT
Brandywine Realty Trust
BDN
$537M
– –
-3
Closed -$4K
BE icon
7578
Bloom Energy
BE
$74.5B
– –
-962
Closed -$8.16K
BFH icon
7579
Bread Financial
BFH
$4.26B
– –
-30,549
Closed -$2.08M
BGC icon
7580
BGC Group
BGC
$5.79B
– –
-18,826
Closed -$92K
BHP icon
7581
BHP
BHP
$230B
– –
-51,508
Closed -$2.15M
BIL icon
7582
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$46.5B
– –
-3,900
Closed -$356K
BIO icon
7583
Bio-Rad Laboratories Class A
BIO
$10.3B
– –
-838
Closed -$308K
BIP icon
7584
Brookfield Infrastructure Partners
BIP
$17.1B
– –
-2,110
Closed -$61.6K
BKLN icon
7585
Invesco Senior Loan ETF
BKLN
$6.77B
– –
-23,951
Closed -$546K
BL icon
7586
BlackLine
BL
$1.9B
– –
-4,319
Closed -$253K
BNDX icon
7587
Vanguard Total International Bond ETF
BNDX
$83.4B
– –
-1,177
Closed -$67.2K
BNDX icon
7588
PUT
Vanguard Total International Bond ETF
BNDX
$83.4B
– –
-1
Closed -$5K
BNO icon
7589
United States Brent Oil Fund
BNO
$696M
– –
-13,693
Closed -$222K
BOH icon
7590
Bank of Hawaii
BOH
$3.05B
– –
-1,419
Closed -$114K
BRKL
7591
DELISTED
Brookline Bancorp
BRKL
– –
-6,116
Closed -$100K
BRKL
7592
PUT
DELISTED
Brookline Bancorp
BRKL
– –
-103
Closed -$169K
BRX icon
7593
Brixmor Property Group
BRX
$8.95B
– –
-11,311
Closed -$203K
BRY
7594
CALL
DELISTED
Berry Corp
BRY
– –
-36
Closed -$33K
BSET icon
7595
Bassett Furniture
BSET
$166M
– –
-761
Closed -$12K
BSET icon
7596
PUT
Bassett Furniture
BSET
$166M
– –
-40
Closed -$66K
STEX
7597
CALL
Streamex Corp
STEX
$83.3M
– –
-5
Closed -$31K
SLAI
7598
CALL
DELISTED
SOLAI Ltd ADS
SLAI
– –
-1
Closed -$37K
BW icon
7599
Babcock & Wilcox
BW
$1.06B
– –
-50,334
Closed -$183K
BW icon
7600
PUT
Babcock & Wilcox
BW
$1.06B
– –
-796
Closed -$289K
302 303
304
305 306

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Simplex Trading's Q1 2020 Portfolio in Review

As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Simplex Trading's Q1 2020 filing shows 1,511 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.

By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
  • Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
  • Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
  • Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
  • Simplex Trading opened 1,511 new positions and closed 1,159 in Q1 2020.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.

Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.