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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
-17.92%
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
$94.1B
AUM Growth
-$15.3B
Cap. Flow
+$638M
Cap. Flow %
0.68%
Top 10 Hldgs %
40.12%
Holding
11,810
New
1,404
Increased
4,026
Reduced
4,284
Closed
1,790

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$286M
2
VOO icon
Vanguard S&P 500 ETF
VOO
+$82.3M
3
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$72.6M
4
GOOG icon
Alphabet (Google) Class C
GOOG
+$64.2M
5
INTC icon
Intel
INTC
+$52.9M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$51.5M
2
SLV icon
iShares Silver Trust
SLV
+$41.8M
3
F icon
Ford
F
+$26.3M
4
UAL icon
United Airlines
UAL
+$22.7M
5
XOM icon
ExxonMobil
XOM
+$22.3M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.48%
2 Technology 0.84%
3 Consumer Discretionary 0.32%
4 Communication Services 0.32%
5 Financials 0.28%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
RDFN
10876
DELISTED
Redfin
RDFN
– –
-13,499
Closed -$154K
RDUS
10877
DELISTED
Radius Recycling
RDUS
– –
-1,291
Closed -$55K
RDVT icon
10878
Red Violet
RDVT
$1.22B
– –
-100
Closed -$2.46K
RDW icon
10879
Redwire
RDW
$2.63B
– –
-21,791
Closed -$105K
RDWR icon
10880
CALL
Radware
RDWR
$1.19B
– –
-4,100
Closed -$131K
REM icon
10881
iShares Mortgage Real Estate ETF
REM
$541M
– –
-3,416
Closed -$111K
REPL icon
10882
Replimune Group
REPL
$1.42B
– –
-799
Closed -$13.1K
REPX icon
10883
Riley Exploration Permian
REPX
$929M
– –
-186
Closed -$4.76K
REVG
10884
CALL
DELISTED
REV Group
REVG
– –
-1,200
Closed -$16K
REVG
10885
DELISTED
REV Group
REVG
$0 ﹤0.01%
58
-710
-92% -$8.41K
REZ icon
10886
iShares Residential and Multisector Real Estate ETF
REZ
$844M
– –
-110
Closed -$10K
RGNX icon
10887
Regenxbio
RGNX
$590M
– –
-323
Closed -$8.07K
RGNX icon
10888
PUT
Regenxbio
RGNX
$590M
– –
-200
Closed -$6K
RGP icon
10889
PUT
Resources Connection
RGP
$139M
– –
-13,900
Closed -$238K
RGS icon
10890
PUT
Regis Corp
RGS
$71.2M
– –
-1,790
Closed -$75K
RHI icon
10891
Robert Half
RHI
$4.36B
– –
-235
Closed -$22.3K
RIGL icon
10892
Rigel Pharmaceuticals
RIGL
$909M
– –
-6,412
Closed -$129K
RILY icon
10893
BRC Group Holdings
RILY
$283M
– –
-4,342
Closed -$228K
RING icon
10894
iShares MSCI Global Gold Miners ETF
RING
$2.53B
– –
-391
Closed -$12K
RIVN icon
10895
Rivian
RIVN
$22.8B
– –
-32,658
Closed -$1.02M
RLAY icon
10896
Relay Therapeutics
RLAY
$4.17B
– –
-2,710
Closed -$58.1K
RLGT icon
10897
Radiant Logistics
RLGT
$395M
– –
-30,240
Closed -$194K
RLI icon
10898
RLI Corp
RLI
$5.73B
– –
-1,482
Closed -$81K
RMD icon
10899
ResMed
RMD
$32.9B
– –
-1,186
Closed -$252K
RMNI icon
10900
Rimini Street
RMNI
$468M
– –
-3,327
Closed -$19.8K
434 435
436
437 438

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Simplex Trading's Q2 2022 Portfolio in Review

As of Q2 2022, Simplex Trading held 11,810 positions worth $94.1B, down 14% from $109B the previous quarter. Its ten largest holdings account for 40% of the portfolio.

Simplex Trading's Q2 2022 filing shows 1,404 new, 4,026 increased, 4,284 reduced and 1,790 closed positions. Its largest new stake was Alphabet (Google) Class C: 543,540 shares worth $59.4M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $51.5M.

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

  • Simplex Trading's largest Q2 2022 buy was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
  • Simplex Trading added most to Apple in Q2 2022, an estimated $286M increase.
  • Simplex Trading's biggest Q2 2022 reduction was United Airlines, cutting an estimated $22.7M.
  • Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2022, selling an estimated $51.5M.
  • Simplex Trading's ten largest holdings make up 40% of its $94.1B portfolio in Q2 2022.
  • Simplex Trading opened 1,404 new positions and closed 1,790 in Q2 2022.
  • Simplex Trading's portfolio value fell 14% quarter-over-quarter to $94.1B.

Based on Simplex Trading's 13F filing for Q2 2022, filed 3 Aug 2022.