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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1926
PUT
IDEX
IEX
$16.5B
| $1.87M | ﹤0.01% |
8,200
| – | – |
|
1927
CALL
Agios Pharmaceuticals
AGIO
$2.16B
| $1.87M | ﹤0.01% |
66,600
+51,200
| +332% | +$1.44M |
|
|
DVAX
1928
DELISTED
Dynavax Technologies
DVAX
| $1.87M | ﹤0.01% |
175,776
+1,630
| +0.9% | +$18.9K |
|
1929
Griffon
GFF
$4.16B
| $1.87M | ﹤0.01% |
52,194
+18,796
| +56% | +$627K |
|
1930
CALL
NuScale Power
SMR
$2.8B
| $1.87M | ﹤0.01% |
182,000
+45,400
| +33% | +$503K |
|
1931
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $1.86M | ﹤0.01% |
18,400
-22,900
| -55% | -$2.44M |
|
1932
PUT
BCE
BCE
$19.9B
| $1.86M | ﹤0.01% |
42,400
+21,000
| +98% | +$946K |
|
|
VRNA
1933
DELISTED
Verona Pharma
VRNA
| $1.86M | ﹤0.01% |
+71,332
| New | +$950K |
|
1934
PUT
Dutch Bros
BROS
$8.78B
| $1.86M | ﹤0.01% |
65,900
-300,300
| -82% | -$9.93M |
|
1935
PUT
Ecolab
ECL
$75.6B
| $1.85M | ﹤0.01% |
12,700
-7,000
| -36% | -$1.03M |
|
1936
CALL
Aptiv
APTV
$12B
| $1.84M | ﹤0.01% |
19,800
-24,900
| -56% | -$2.37M |
|
1937
CALL
AerCap
AER
$23.9B
| $1.84M | ﹤0.01% |
31,600
-57,200
| -64% | -$3.16M |
|
1938
CALL
Microvision
MVIS
$88.2M
| $1.84M | ﹤0.01% |
782,800
-100,800
| -11% | -$312K |
|
1939
PUT
RingCentral
RNG
$4.05B
| $1.84M | ﹤0.01% |
51,900
-110,600
| -68% | -$3.96M |
|
1940
Sony
SONY
$123B
| $1.83M | ﹤0.01% |
+120,290
| New | +$1.8M |
|
|
HBI
1941
PUT
DELISTED
Hanesbrands
HBI
| $1.82M | ﹤0.01% |
286,200
+125,500
| +78% | +$862K |
|
1942
CALL
Grab
GRAB
$13.5B
| $1.82M | ﹤0.01% |
564,100
+203,200
| +56% | +$582K |
|
1943
CALL
GrowGeneration
GRWG
$82.9M
| $1.82M | ﹤0.01% |
463,300
+279,300
| +152% | +$1.33M |
|
1944
ING
ING
$93.8B
| $1.81M | ﹤0.01% |
+149,152
| New | +$1.62M |
|
1945
CALL
Warner Music
WMG
$13.8B
| $1.81M | ﹤0.01% |
51,700
+51,500
| +25,750% | +$1.5M |
|
1946
CALL
Avantor
AVTR
$7.81B
| $1.81M | ﹤0.01% |
85,700
-629,900
| -88% | -$13M |
|
1947
CALL
Avnet
AVT
$7.33B
| $1.8M | ﹤0.01% |
43,400
+35,300
| +436% | +$1.47M |
|
1948
PUT
Blackstone Mortgage Trust
BXMT
$2.82B
| $1.8M | ﹤0.01% |
85,200
-23,300
| -21% | -$552K |
|
1949
Molson Coors Class B
TAP
$7.68B
| $1.8M | ﹤0.01% |
35,001
+20,220
| +137% | +$1.04M |
|
1950
Flex
FLEX
$43.4B
| $1.8M | ﹤0.01% |
111,282
+100,608
| +943% | +$1.51M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.