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 | |
|---|---|---|---|---|---|---|
1601
Ralph Lauren
RL
$22.2B
| $1.46M | ﹤0.01% |
+15,243
| New | +$1.51M |
|
1602
PUT
WEC Energy
WEC
$37.7B
| $1.46M | ﹤0.01% |
153
+11
| +8% | +$991 |
|
|
SAVE
1603
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $1.46M | ﹤0.01% |
401
+205
| +105% | +$8.62K |
|
1604
Altria Group
MO
$122B
| $1.45M | ﹤0.01% |
+35,525
| New | +$1.63M |
|
1605
PUT
First Trust Natural Gas ETF
FCG
$632M
| $1.45M | ﹤0.01% |
439
+233
| +113% | +$2.86K |
|
1606
PUT
LPL Financial
LPLA
$26.3B
| $1.45M | ﹤0.01% |
177
-143
| -45% | -$11.4K |
|
|
CTRA
1607
CALL
DELISTED
Coterra Energy
CTRA
| $1.44M | ﹤0.01% |
822
+365
| +80% | +$7K |
|
|
CERN
1608
DELISTED
Cerner Corp
CERN
| $1.44M | ﹤0.01% |
+21,170
| New | +$1.5M |
|
|
PEGI
1609
CALL
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $1.44M | ﹤0.01% |
534
+297
| +125% | +$7.48K |
|
1610
TD Synnex
SNX
$19.4B
| $1.44M | ﹤0.01% |
25,464
+20,726
| +437% | +$967K |
|
|
ZGNX
1611
PUT
DELISTED
Zogenix, Inc.
ZGNX
| $1.44M | ﹤0.01% |
359
-86
| -19% | -$3.96K |
|
1612
DaVita
DVA
$15.1B
| $1.44M | ﹤0.01% |
25,156
+5,853
| +30% | +$340K |
|
1613
Pinduoduo
PDD
$118B
| $1.43M | ﹤0.01% |
44,447
-87,469
| -66% | -$2.34M |
|
|
TUP
1614
PUT
DELISTED
Tupperware Brands Corporation
TUP
| $1.43M | ﹤0.01% |
902
+491
| +119% | +$7.58K |
|
|
CEQP
1615
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $1.43M | ﹤0.01% |
392
-67
| -15% | -$2.43K |
|
1616
PUT
Eaton
ETN
$157B
| $1.43M | ﹤0.01% |
172
+70
| +69% | +$5.67K |
|
1617
CALL
Matador Resources
MTDR
$6.31B
| $1.43M | ﹤0.01% |
865
+127
| +17% | +$2.12K |
|
1618
CALL
Teck Resources
TECK
$29.5B
| $1.43M | ﹤0.01% |
881
+497
| +129% | +$9.39K |
|
1619
PUT
The Mosaic Company
MOS
$7.09B
| $1.43M | ﹤0.01% |
697
-361
| -34% | -$7.86K |
|
1620
PUT
Cloudflare
NET
$93B
| $1.42M | ﹤0.01% |
+767
| New | +$14.8K |
|
1621
Agnico Eagle Mines
AEM
$72.6B
| $1.42M | ﹤0.01% |
+26,544
| New | +$1.5M |
|
1622
PUT
TripAdvisor
TRIP
$1.59B
| $1.42M | ﹤0.01% |
367
+200
| +120% | +$8.33K |
|
1623
PUT
Wendy's
WEN
$1.33B
| $1.42M | ﹤0.01% |
709
+447
| +171% | +$8.91K |
|
|
ZUO
1624
CALL
DELISTED
Zuora, Inc.
ZUO
| $1.41M | ﹤0.01% |
937
+686
| +273% | +$10.3K |
|
1625
PUT
Banco Bradesco
BBD
$38.1B
| $1.41M | ﹤0.01% |
2,191
-354
| -14% | -$2.34K |
|
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.