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 | |
|---|---|---|---|---|---|---|
|
AL
1951
PUT
DELISTED
Air Lease Corp
AL
| $978K | ﹤0.01% |
234
+143
| +157% | +$5.88K |
|
1952
PUT
Church & Dwight Co
CHD
$23.1B
| $978K | ﹤0.01% |
130
+86
| +195% | +$6.51K |
|
1953
CALL
Methanex
MEOH
$4.32B
| $978K | ﹤0.01% |
276
+226
| +452% | +$8.35K |
|
|
SNP
1954
CALL
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $974K | ﹤0.01% |
166
-151
| -48% | -$9.36K |
|
|
BID
1955
PUT
DELISTED
Sotheby's
BID
| $974K | ﹤0.01% |
171
-11
| -6% | -$637 |
|
1956
PUT
Immersion
IMMR
$216M
| $973K | ﹤0.01% |
1,273
-140
| -10% | -$1.11K |
|
|
CLDR
1957
DELISTED
Cloudera, Inc.
CLDR
| $973K | ﹤0.01% |
109,841
-133,394
| -55% | -$926K |
|
1958
Ionis Pharmaceuticals
IONS
$9.35B
| $972K | ﹤0.01% |
16,235
-6,948
| -30% | -$453K |
|
1959
PUT
Children's Place
PLCE
$53.6M
| $970K | ﹤0.01% |
126
+21
| +20% | +$1.85K |
|
1960
PUT
CRA International
CRAI
$1.1B
| $969K | ﹤0.01% |
231
-12
| -5% | -$488 |
|
1961
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $968K | ﹤0.01% |
81
+73
| +913% | +$8.61K |
|
1962
PUT
Levi Strauss
LEVI
$9.44B
| $967K | ﹤0.01% |
508
+49
| +11% | +$909 |
|
1963
CALL
IDEX
IEX
$16.5B
| $966K | ﹤0.01% |
59
+13
| +28% | +$2.16K |
|
|
GMS
1964
CALL
DELISTED
GMS Inc
GMS
| $964K | ﹤0.01% |
336
+10
| +3% | +$245 |
|
1965
CALL
Paysign
PAYS
$486M
| $964K | ﹤0.01% |
955
+936
| +4,926% | +$12.5K |
|
1966
CALL
Galicia Financial Group
GGAL
$7.92B
| $960K | ﹤0.01% |
739
-253
| -26% | -$5.95K |
|
1967
PUT
Aramark
ARMK
$15B
| $958K | ﹤0.01% |
305
-111
| -27% | -$3.12K |
|
1968
Middleby
MIDD
$6.05B
| $958K | ﹤0.01% |
+8,197
| New | +$1.01M |
|
1969
CALL
Moderna
MRNA
$21.5B
| $958K | ﹤0.01% |
602
+414
| +220% | +$6.12K |
|
1970
PUT
HF Sinclair
DINO
$15.9B
| $954K | ﹤0.01% |
178
+131
| +279% | +$6.35K |
|
1971
PUT
Energy Transfer Partners
ET
$70.1B
| $954K | ﹤0.01% |
730
-374
| -34% | -$5.21K |
|
1972
CALL
New Oriental
EDU
$7.84B
| $952K | ﹤0.01% |
86
-87
| -50% | -$9.11K |
|
1973
PUT
Grand Canyon Education
LOPE
$3.71B
| $952K | ﹤0.01% |
97
+21
| +28% | +$2.5K |
|
1974
CALL
MarketAxess Holdings
MKTX
$4.15B
| $949K | ﹤0.01% |
29
+25
| +625% | +$8.95K |
|
1975
CALL
Yeti Holdings
YETI
$3.82B
| $949K | ﹤0.01% |
339
-1,157
| -77% | -$35.1K |
|
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.