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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
XLRE icon
8376
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.26B
– –
-21,478
Closed -$830K
XME icon
8377
State Street SPDR S&P Metals & Mining ETF
XME
$4.86B
– –
-127,937
Closed -$3.75M
XNCR icon
8378
Xencor
XNCR
$1.98B
– –
-260
Closed -$8K
XPEL icon
8379
CALL
XPEL
XPEL
$1.42B
– –
-30
Closed -$43K
XPEL icon
8380
PUT
XPEL
XPEL
$1.42B
– –
-45
Closed -$65K
XPO icon
8381
XPO
XPO
$22.6B
– –
-25,450
Closed -$680K
XPRO icon
8382
Expro Ltd
XPRO
$2.02B
– –
-65
Closed -$1.37K
XPP icon
8383
ProShares Ultra FTSE China 50 of PROSHARES TRUST
XPP
$8.52M
– –
-1,681
Closed -$113K
YCBD icon
8384
cbdMD
YCBD
$5.33M
– –
-3
Closed -$1.18K
YCBD icon
8385
PUT
cbdMD
YCBD
$5.33M
– –
0
– -$19K
YEXT icon
8386
Yext
YEXT
$644M
– –
-8,120
Closed -$116K
YOLO icon
8387
AdvisorShares Pure Cannabis ETF
YOLO
$35.3M
– –
-391
Closed -$4K
Z icon
8388
Zillow
Z
$7.78B
– –
-6,204
Closed -$287K
ZEUS
8389
CALL
DELISTED
Olympic Steel
ZEUS
– –
-8
Closed -$14K
ZUMZ icon
8390
Zumiez
ZUMZ
$304M
– –
-217
Closed -$6.12K
ZVRA icon
8391
Zevra Therapeutics
ZVRA
$736M
– –
-6
Closed –
ZYME icon
8392
Zymeworks
ZYME
$2.09B
– –
-39,379
Closed -$1.61M
MTUS icon
8393
Metallus
MTUS
$826M
– –
-9,403
Closed -$52.6K
VRN
8394
DELISTED
Veren
VRN
– –
-5,616
Closed -$15.5K
AMBR
8395
Amber International Holding Ltd
AMBR
$85.8M
– –
-1,726
Closed -$70K
CNH
8396
CNH Industrial
CNH
$23.2B
– –
-2,974
Closed -$23.2K
SMC
8397
CALL
Summit Midstream
SMC
$471M
– –
-1
Closed -$4K
TXNM
8398
TXNM Energy Inc
TXNM
$5.98B
– –
-291
Closed -$14.1K
UCB
8399
CALL
United Community Banks
UCB
$4.3B
– –
-1
Closed -$3K
CSCI
8400
CALL
DELISTED
COSCIENS Biopharma Inc. Common Stock
CSCI
– –
-2
Closed -$15K
334 335
336
337 338

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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.