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 | |
|---|---|---|---|---|---|---|
676
PUT
Cloudflare
NET
$95.5B
| $14.9M | 0.02% |
330,600
-14,800
| -4% | -$732K |
|
677
PUT
BILL Holdings
BILL
$4.17B
| $14.9M | 0.02% |
137,100
+57,300
| +72% | +$6.88M |
|
|
FLNA
678
CALL
Filana Therapeutics
FLNA
$46.6M
| $14.9M | 0.02% |
505,700
+11,400
| +2% | +$410K |
|
679
CALL
Dell
DELL
$285B
| $14.9M | 0.02% |
378,700
+164,300
| +77% | +$6.5M |
|
680
PUT
GSK
GSK
$102B
| $14.9M | 0.02% |
545,300
-204,200
| -27% | -$6.8M |
|
681
PUT
Molina Healthcare
MOH
$11.6B
| $14.9M | 0.02% |
45,000
+42,000
| +1,400% | +$14.3M |
|
682
PUT
Simon Property Group
SPG
$73.4B
| $14.8M | 0.02% |
126,200
+6,100
| +5% | +$678K |
|
683
CALL
Scorpio Tankers
STNG
$3.9B
| $14.8M | 0.02% |
275,000
+88,200
| +47% | +$4.41M |
|
684
CALL
Tyson Foods
TSN
$20.1B
| $14.8M | 0.02% |
237,200
+105,000
| +79% | +$6.83M |
|
685
Verizon
VZ
$185B
| $14.7M | 0.02% |
373,817
+169,433
| +83% | +$6.38M |
|
686
PUT
Akamai
AKAM
$18.1B
| $14.7M | 0.02% |
174,700
+6,800
| +4% | +$592K |
|
687
CALL
Lumen
LUMN
$6.9B
| $14.7M | 0.02% |
2,819,000
+1,365,600
| +94% | +$8.39M |
|
|
K
688
PUT
DELISTED
Kellanova
K
| $14.6M | 0.02% |
218,645
-43,771
| -17% | -$2.97M |
|
689
PUT
Generac Holdings
GNRC
$12.6B
| $14.6M | 0.02% |
144,900
+84,800
| +141% | +$9.6M |
|
690
CALL
HSBC
HSBC
$354B
| $14.6M | 0.02% |
468,000
+143,200
| +44% | +$4.06M |
|
|
MRO
691
PUT
DELISTED
Marathon Oil Corporation
MRO
| $14.5M | 0.02% |
535,300
-189,200
| -26% | -$5.49M |
|
692
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $14.5M | 0.02% |
111,600
+23,500
| +27% | +$2.72M |
|
693
CALL
New Oriental
EDU
$7.75B
| $14.4M | 0.02% |
414,800
-129,600
| -24% | -$3.66M |
|
694
PUT
Mondelez International
MDLZ
$78.1B
| $14.4M | 0.02% |
216,200
-56,600
| -21% | -$3.58M |
|
|
MAXR
695
PUT
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $14.4M | 0.02% |
277,800
+236,300
| +569% | +$6.49M |
|
696
CALL
Madrigal Pharmaceuticals
MDGL
$12.4B
| $14.3M | 0.02% |
49,400
+23,400
| +90% | +$2.29M |
|
697
CALL
Corning
GLW
$133B
| $14.3M | 0.02% |
448,500
+24,900
| +6% | +$808K |
|
698
PUT
Agnico Eagle Mines
AEM
$73.5B
| $14.3M | 0.02% |
274,600
+49,600
| +22% | +$2.34M |
|
699
CALL
Axsome Therapeutics
AXSM
$12.3B
| $14.3M | 0.02% |
185,100
+86,900
| +88% | +$5.19M |
|
700
PUT
Dominion Energy
D
$62.5B
| $14.2M | 0.02% |
232,000
-27,500
| -11% | -$1.73M |
|
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.