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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
+6.2%
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
$2.32B
AUM Growth
-$126M
Cap. Flow
-$315M
Cap. Flow %
-13.55%
Top 10 Hldgs %
17.34%
Holding
7,407
New
1,548
Increased
2,053
Reduced
2,239
Closed
1,460

Top Buys

Rank Stock Value
1
CELG
Celgene Corp
CELG
+$31.6M
2
C icon
Citigroup
C
+$19.5M
3
AGN
Allergan plc
AGN
+$18.4M
4
BIDU icon
Baidu
BIDU
+$18M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$14.2M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$81.3M
2
NVDA icon
NVIDIA
NVDA
+$60.2M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$48.2M
4
AAPL icon
Apple
AAPL
+$48.2M
5
META icon
Meta Platforms (Facebook)
META
+$31.2M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 11.27%
2 Technology 10.64%
3 Healthcare 7.06%
4 Communication Services 6.92%
5 Industrials 5.66%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EGHT icon
5476
CALL
8x8 Inc
EGHT
$254M
$1K ﹤0.01%
31
-605
-95% -$8.36K
EGHT icon
5477
PUT
8x8 Inc
EGHT
$254M
$1K ﹤0.01%
83
-29
-26% -$401
EHTH icon
5478
PUT
eHealth
EHTH
$42.9M
$1K ﹤0.01%
+11
New +$246
EINC icon
5479
CALL
VanEck Energy Income ETF
EINC
$79.5M
$1K ﹤0.01%
2
-9
-82% -$633
ENOV icon
5480
CALL
Enovis
ENOV
$1.58B
$1K ﹤0.01%
8
-2
-20% -$135
ENOV icon
5481
PUT
Enovis
ENOV
$1.58B
$1K ﹤0.01%
5
-36
-88% -$2.42K
ENS icon
5482
CALL
EnerSys
ENS
$6.95B
$1K ﹤0.01%
23
-31
-57% -$2.12K
ENVA icon
5483
PUT
Enova International
ENVA
$5.99B
$1K ﹤0.01%
35
-18
-34% -$264
EPOL icon
5484
iShares MSCI Poland ETF
EPOL
$674M
$1K ﹤0.01%
+60
New +$1.61K
ERIC icon
5485
PUT
Ericsson
ERIC
$31.7B
$1K ﹤0.01%
218
-7
-3% -$44
ETSY icon
5486
PUT
Etsy
ETSY
$7.79B
$1K ﹤0.01%
169
-68
-29% -$1.2K
FDS icon
5487
PUT
Factset
FDS
$9.18B
$1K ﹤0.01%
56
-33
-37% -$6.33K
FENG
5488
CALL
Phoenix New Media
FENG
$16.7M
$1K ﹤0.01%
9
+7
+350% +$261
FF icon
5489
Future Fuel
FF
$203M
$1K ﹤0.01%
+78
New +$1.16K
FFIV icon
5490
PUT
F5
FFIV
$22.5B
$1K ﹤0.01%
54
-8
-13% -$994
FHI icon
5491
CALL
Federated Hermes
FHI
$4.45B
$1K ﹤0.01%
+2
New +$65
FICO icon
5492
PUT
Fair Isaac
FICO
$29.3B
$1K ﹤0.01%
+4
New +$605
FLO icon
5493
PUT
Flowers Foods
FLO
$1.67B
$1K ﹤0.01%
14
-128
-90% -$2.46K
FNB icon
5494
PUT
FNB Corp
FNB
$6.82B
$1K ﹤0.01%
+68
New +$934
FORM icon
5495
PUT
FormFactor
FORM
$8.19B
$1K ﹤0.01%
+22
New +$368
FRT icon
5496
CALL
Federal Realty Investment Trust
FRT
$10.9B
$1K ﹤0.01%
+3
New +$387
FSM icon
5497
Fortuna Silver Mines
FSM
$2.62B
$1K ﹤0.01%
+331
New +$1.49K
FTAI icon
5498
FTAI Aviation
FTAI
$22.6B
$1K ﹤0.01%
64
-50,338
-100% -$789K
FWONA icon
5499
PUT
Liberty Media Series A
FWONA
$22.3B
$1K ﹤0.01%
+9
New +$308
GDS icon
5500
PUT
GDS Holdings
GDS
$6.34B
$1K ﹤0.01%
+10
New +$177
218 219
220
221 222

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Simplex Trading's Q4 2017 Portfolio in Review

As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.

By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.

Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.

  • Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
  • Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
  • Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
  • Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
  • Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
  • Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
  • Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.

Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.