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 | |
|---|---|---|---|---|---|---|
926
CALL
Iron Mountain
IRM
$37.1B
| $8.41M | 0.01% |
168,800
+74,200
| +78% | +$3.75M |
|
927
CALL
PG&E
PCG
$38.6B
| $8.41M | 0.01% |
517,000
-591,800
| -53% | -$8.95M |
|
|
TWO
928
CALL
Two Harbors Investment
TWO
$1.27B
| $8.39M | 0.01% |
531,900
+395,500
| +290% | +$5.94M |
|
929
PUT
Zebra Technologies
ZBRA
$12.2B
| $8.33M | 0.01% |
32,500
+4,700
| +17% | +$1.22M |
|
930
CALL
Gaming and Leisure Properties
GLPI
$12.6B
| $8.32M | 0.01% |
159,700
-7,000
| -4% | -$349K |
|
931
PUT
American International
AIG
$41.4B
| $8.3M | 0.01% |
131,300
+53,800
| +69% | +$3.13M |
|
932
CALL
MP Materials
MP
$7.95B
| $8.29M | 0.01% |
341,300
+174,200
| +104% | +$5.28M |
|
933
PUT
Eaton
ETN
$161B
| $8.26M | 0.01% |
52,600
+2,900
| +6% | +$445K |
|
|
FL
934
PUT
DELISTED
Foot Locker
FL
| $8.24M | 0.01% |
218,000
-13,100
| -6% | -$449K |
|
935
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$505M
| $8.22M | 0.01% |
73,100
+10,100
| +16% | +$187K |
|
936
PUT
Canadian Solar
CSIQ
$997M
| $8.22M | 0.01% |
265,900
+27,500
| +12% | +$924K |
|
937
CALL
Mondelez International
MDLZ
$77.1B
| $8.19M | 0.01% |
122,900
-58,400
| -32% | -$3.69M |
|
938
CALL
Live Nation Entertainment
LYV
$41B
| $8.16M | 0.01% |
117,000
+11,500
| +11% | +$852K |
|
939
PUT
Nasdaq
NDAQ
$51.1B
| $8.15M | 0.01% |
132,900
+34,300
| +35% | +$2.14M |
|
940
CALL
Super Micro Computer
SMCI
$20.2B
| $8.14M | 0.01% |
992,000
+286,000
| +41% | +$2.18M |
|
|
SGI
941
CALL
Somnigroup International
SGI
$14.5B
| $8.11M | 0.01% |
236,100
+86,400
| +58% | +$2.6M |
|
942
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
| $8.09M | 0.01% |
111,900
-23,300
| -17% | -$1.68M |
|
943
CALL
ZIM Integrated Shipping Services
ZIM
$3.08B
| $8.05M | 0.01% |
468,600
+53,600
| +13% | +$1.19M |
|
944
PUT
Match Group
MTCH
$8.72B
| $8.03M | 0.01% |
193,500
-26,700
| -12% | -$1.21M |
|
|
945
PUT
Super Micro Computer
SMCI
$20.2B
| $8M | 0.01% |
974,000
+937,000
| +2,532% | +$7.13M |
|
946
Cenovus Energy
CVE
$55.4B
| $7.98M | 0.01% |
411,046
+383,086
| +1,370% | +$7.35M |
|
947
PUT
Cameco
CCJ
$38.9B
| $7.97M | 0.01% |
351,400
-839,000
| -70% | -$19.7M |
|
948
PUT
Deutsche Bank
DB
$65.3B
| $7.96M | 0.01% |
691,100
-253,900
| -27% | -$2.5M |
|
949
CALL
BioMarin Pharmaceuticals
BMRN
$11.4B
| $7.95M | 0.01% |
76,800
+15,400
| +25% | +$1.45M |
|
950
CALL
Organon & Co
OGN
$3.56B
| $7.95M | 0.01% |
284,500
+203,700
| +252% | +$5.21M |
|
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.