Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
UN
951
PUT
DELISTED
Unilever NV New York Registry Shares
UN
| $3.37M | 0.01% |
562
+439
| +357% | +$26.4K |
|
952
CALL
Pan American Silver
PAAS
$18.6B
| $3.37M | 0.01% |
2,149
+462
| +27% | +$7.48K |
|
953
CALL
RenaissanceRe
RNR
$13.8B
| $3.37M | 0.01% |
174
+53
| +44% | +$9.87K |
|
954
PUT
Tractor Supply
TSCO
$16.3B
| $3.36M | 0.01% |
1,860
+70
| +4% | +$1.45K |
|
955
CALL
Ralph Lauren
RL
$22.2B
| $3.35M | 0.01% |
351
+291
| +485% | +$28.8K |
|
|
DISCK
956
PUT
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $3.35M | 0.01% |
1,263
-29
| -2% | -$783 |
|
957
CALL
Cadence Design Systems
CDNS
$90B
| $3.34M | 0.01% |
505
+110
| +28% | +$7.74K |
|
958
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$249M
| $3.33M | 0.01% |
51
-44
| -46% | -$3.16M |
|
959
CALL
Euronet Worldwide
EEFT
$3.02B
| $3.32M | 0.01% |
227
+105
| +86% | +$16.3K |
|
960
CALL
KB Home
KBH
$3.48B
| $3.31M | 0.01% |
975
+334
| +52% | +$9.35K |
|
961
PUT
Pinterest
PINS
$12.4B
| $3.27M | 0.01% |
1,236
-333
| -21% | -$9.97K |
|
962
CALL
Paycom
PAYC
$6.78B
| $3.27M | 0.01% |
156
-74
| -32% | -$17.3K |
|
963
PUT
Equifax
EFX
$20.3B
| $3.26M | 0.01% |
232
-51
| -18% | -$7.19K |
|
964
CALL
Domino's
DPZ
$11B
| $3.25M | 0.01% |
133
+39
| +41% | +$9.66K |
|
|
ACIA
965
PUT
DELISTED
Acacia Communications Inc
ACIA
| $3.25M | 0.01% |
497
+449
| +935% | +$28.4K |
|
|
966
PUT
Paycom
PAYC
$6.78B
| $3.25M | 0.01% |
155
+120
| +343% | +$28K |
|
967
CALL
CF Industries
CF
$19.2B
| $3.24M | 0.01% |
659
+238
| +57% | +$11.5K |
|
|
JWN
968
CALL
DELISTED
Nordstrom
JWN
| $3.24M | 0.01% |
962
-102
| -10% | -$3.11K |
|
969
PUT
Canadian Solar
CSIQ
$906M
| $3.24M | 0.01% |
1,714
+363
| +27% | +$7.9K |
|
|
DFS
970
CALL
DELISTED
Discover Financial Services
DFS
| $3.23M | 0.01% |
398
-132
| -25% | -$10.9K |
|
971
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $3.23M | 0.01% |
28,698
-6,884
| -19% | -$768K |
|
972
CALL
IPG Photonics
IPGP
$3.89B
| $3.21M | 0.01% |
237
+225
| +1,875% | +$29.8K |
|
973
CALL
Williams Companies
WMB
$90.5B
| $3.21M | 0.01% |
1,335
+30
| +2% | +$756 |
|
|
HDS
974
CALL
DELISTED
HD Supply Holdings, Inc.
HDS
| $3.21M | 0.01% |
819
+653
| +393% | +$25.6K |
|
975
CALL
Progressive
PGR
$124B
| $3.2M | 0.01% |
414
+242
| +141% | +$19K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.