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 | Miscellaneous | 97.54% |
| 2 | Consumer Discretionary | 0.49% |
| 3 | Technology | 0.48% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SFIX
926
PUT
Stitch Fix
SFIX
$407M
| $3.49M | 0.01% |
1,814
+1,528
| +534% | +$35.5K |
|
927
CALL
AerCap
AER
$22.9B
| $3.49M | 0.01% |
637
-28
| -4% | -$1.48K |
|
928
PUT
Itaú Unibanco
ITUB
$89.8B
| $3.49M | 0.01% |
5,698
+2,456
| +76% | +$15.9K |
|
929
PUT
Mohawk Industries
MHK
$9.05B
| $3.49M | 0.01% |
281
-521
| -65% | -$66.9K |
|
930
CALL
Ciena
CIEN
$45.5B
| $3.48M | 0.01% |
888
-472
| -35% | -$19.8K |
|
|
BNY
931
CALL
Bank of New York Mellon
BNY
$112B
| $3.48M | 0.01% |
769
+180
| +31% | +$8.01K |
|
|
JOYY
932
PUT
JOYY Inc
JOYY
$3.67B
| $3.48M | 0.01% |
618
+54
| +10% | +$3.28K |
|
933
CALL
Elastic
ESTC
$9.64B
| $3.47M | 0.01% |
422
-3
| -0.7% | -$267 |
|
|
CIT
934
CALL
DELISTED
CIT Group Inc.
CIT
| $3.46M | 0.01% |
763
+747
| +4,669% | +$34.8K |
|
935
CALL
HSBC
HSBC
$367B
| $3.44M | 0.01% |
900
+602
| +202% | +$23.3K |
|
936
CALL
Incyte
INCY
$25.7B
| $3.44M | 0.01% |
464
-3
| -0.6% | -$242 |
|
937
WEC Energy
WEC
$34.5B
| $3.44M | 0.01% |
36,180
+6,801
| +23% | +$613K |
|
938
PUT
Tyler Technologies
TYL
$14.9B
| $3.44M | 0.01% |
131
+128
| +4,267% | +$31.3K |
|
939
CALL
Perrigo
PRGO
$2.07B
| $3.44M | 0.01% |
615
+453
| +280% | +$23.1K |
|
940
PUT
Quest Diagnostics
DGX
$26.2B
| $3.42M | 0.01% |
320
+110
| +52% | +$11.3K |
|
941
CALL
Ashland
ASH
$3.34B
| $3.42M | 0.01% |
444
-313
| -41% | -$23.8K |
|
942
PUT
Franco-Nevada
FNV
$51.3B
| $3.42M | 0.01% |
375
+34
| +10% | +$3.12K |
|
943
CALL
W.W. Grainger
GWW
$62.4B
| $3.42M | 0.01% |
115
+62
| +117% | +$17.2K |
|
944
Cardinal Health
CAH
$57.5B
| $3.41M | 0.01% |
72,328
+29,642
| +69% | +$1.35M |
|
945
CALL
Teladoc Health
TDOC
$1.14B
| $3.41M | 0.01% |
504
+197
| +64% | +$13K |
|
|
BITA
946
PUT
DELISTED
Bitauto Holdings Limited
BITA
| $3.4M | 0.01% |
2,275
+2,165
| +1,968% | +$26.5K |
|
947
CALL
Wolfspeed
WOLF
$1.47B
| $3.4M | 0.01% |
693
+15
| +2% | +$816 |
|
948
PUT
Roper Technologies
ROP
$40.3B
| $3.39M | 0.01% |
95
+10
| +12% | +$3.63K |
|
949
PUT
Westlake Corp
WLK
$9.56B
| $3.39M | 0.01% |
517
+29
| +6% | +$1.87K |
|
950
CALL
Invesco
IVZ
$14.6B
| $3.38M | 0.01% |
1,997
+1,409
| +240% | +$24.9K |
|
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 Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Consumer Discretionary and Technology.
- 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.