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 | |
|---|---|---|---|---|---|---|
2951
CALL
W&T Offshore
WTI
$501M
| $617K | ﹤0.01% |
110,700
+5,400
| +5% | +$37.2K |
|
|
SJR
2952
DELISTED
Shaw Communications Inc.
SJR
| $617K | ﹤0.01% |
+21,460
| New | +$563K |
|
2953
PUT
Aspen Aerogels
ASPN
$383M
| $614K | ﹤0.01% |
52,100
+19,800
| +61% | +$226K |
|
2954
CALL
Opko Health
OPK
$929M
| $614K | ﹤0.01% |
491,300
+147,200
| +43% | +$232K |
|
2955
ResMed
RMD
$29.3B
| $614K | ﹤0.01% |
+2,953
| New | +$649K |
|
2956
Weyerhaeuser
WY
$17.3B
| $613K | ﹤0.01% |
+19,786
| New | +$613K |
|
|
PMT
2957
CALL
PennyMac Mortgage Investment
PMT
$841M
| $612K | ﹤0.01% |
49,400
-11,400
| -19% | -$155K |
|
2958
PUT
Azenta
AZTA
$1.27B
| $611K | ﹤0.01% |
10,500
+9,300
| +775% | +$476K |
|
2959
CALL
Global Ship Lease
GSL
$1.55B
| $611K | ﹤0.01% |
36,700
-58,500
| -61% | -$1.01M |
|
|
TGR
2960
CALL
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $611K | ﹤0.01% |
34,900
-8,800
| -20% | -$154K |
|
2961
PUT
Vanguard Total Bond Market
BND
$158B
| $610K | ﹤0.01% |
8,500
+2,200
| +35% | +$158K |
|
2962
CALL
Tradeweb Markets
TW
$21.8B
| $610K | ﹤0.01% |
9,400
-9,500
| -50% | -$558K |
|
2963
CALL
Dover
DOV
$27.4B
| $609K | ﹤0.01% |
4,500
-15,700
| -78% | -$2.09M |
|
|
SRG
2964
Seritage Growth Properties
SRG
$134M
| $609K | ﹤0.01% |
+51,514
| New | +$571K |
|
2965
CALL
Gen Digital
GEN
$16.2B
| $608K | ﹤0.01% |
28,400
-40,000
| -58% | -$883K |
|
2966
CALL
Olin
OLN
$2.51B
| $608K | ﹤0.01% |
11,500
-10,700
| -48% | -$568K |
|
|
CIM
2967
CALL
Chimera Investment
CIM
$1.05B
| $606K | ﹤0.01% |
36,767
+934
| +3% | +$17.4K |
|
|
2968
PUT
Global Ship Lease
GSL
$1.55B
| $606K | ﹤0.01% |
36,400
+10,600
| +41% | +$182K |
|
2969
Otis Worldwide
OTIS
$27.9B
| $606K | ﹤0.01% |
7,744
-8,882
| -53% | -$656K |
|
2970
CALL
World Acceptance Corp
WRLD
$922M
| $606K | ﹤0.01% |
9,200
-600
| -6% | -$47.4K |
|
2971
CALL
Bionano Genomics
BNGO
$12.6M
| $605K | ﹤0.01% |
691
-76
| -10% | -$95.6K |
|
2972
PUT
Sweetgreen
SG
$738M
| $605K | ﹤0.01% |
70,700
-6,500
| -8% | -$94.8K |
|
2973
PUT
Transact Technologies
TACT
$51.8M
| $605K | ﹤0.01% |
97,400
-80,100
| -45% | -$413K |
|
2974
CALL
Suburban Propane Partners
SPH
$1.23B
| $604K | ﹤0.01% |
39,800
+23,900
| +150% | +$383K |
|
2975
PUT
UDR
UDR
$12.8B
| $604K | ﹤0.01% |
15,600
+15,400
| +7,700% | +$608K |
|
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.