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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2426
CALL
Dine Brands
DIN
$448M
| $1.22M | ﹤0.01% |
19,200
+17,500
| +1,029% | +$1.22M |
|
2427
PUT
Dolby
DLB
$4.85B
| $1.22M | ﹤0.01% |
18,700
+18,100
| +3,017% | +$1.35M |
|
2428
CALL
NetApp
NTAP
$33.3B
| $1.22M | ﹤0.01% |
19,700
-12,000
| -38% | -$834K |
|
2429
General Mills
GIS
$19.5B
| $1.22M | ﹤0.01% |
+15,892
| New | +$1.21M |
|
2430
CALL
Edison International
EIX
$30.3B
| $1.22M | ﹤0.01% |
21,500
-40,300
| -65% | -$2.67M |
|
|
CHX
2431
CALL
DELISTED
ChampionX
CHX
| $1.22M | ﹤0.01% |
62,100
-1,200
| -2% | -$24.7K |
|
2432
Magnolia Oil & Gas
MGY
$5.53B
| $1.21M | ﹤0.01% |
61,118
-8,741
| -13% | -$193K |
|
2433
CALL
Remitly
RELY
$4.77B
| $1.21M | ﹤0.01% |
108,900
+24,000
| +28% | +$250K |
|
2434
Corteva
CTVA
$58.6B
| $1.21M | ﹤0.01% |
+21,135
| New | +$1.23M |
|
2435
PENN Entertainment
PENN
$2.83B
| $1.21M | ﹤0.01% |
43,889
-22,553
| -34% | -$728K |
|
2436
Sunoco
SUN
$14B
| $1.21M | ﹤0.01% |
+30,977
| New | +$1.22M |
|
2437
CALL
California Resources
CRC
$4.51B
| $1.21M | ﹤0.01% |
31,400
+24,300
| +342% | +$1.06M |
|
2438
CALL
The GEO Group
GEO
$4.13B
| $1.2M | ﹤0.01% |
156,400
-21,000
| -12% | -$155K |
|
2439
CALL
Geron
GERN
$949M
| $1.2M | ﹤0.01% |
514,400
+52,200
| +11% | +$117K |
|
|
VSXY
2440
PUT
Victoria's Secret
VSXY
$6.78B
| $1.2M | ﹤0.01% |
41,300
+22,300
| +117% | +$752K |
|
2441
PUT
Caleres
CAL
$420M
| $1.2M | ﹤0.01% |
49,600
+43,700
| +741% | +$1.16M |
|
2442
CALL
Tandem Diabetes Care
TNDM
$1.18B
| $1.2M | ﹤0.01% |
25,100
-31,400
| -56% | -$1.72M |
|
2443
PUT
SL Green Realty
SLG
$3.83B
| $1.2M | ﹤0.01% |
29,900
-37,000
| -55% | -$1.72M |
|
2444
CALL
FIVE9
FIVN
$1.96B
| $1.2M | ﹤0.01% |
16,000
-23,500
| -59% | -$2.28M |
|
2445
CALL
10x Genomics
TXG
$5.83B
| $1.2M | ﹤0.01% |
42,100
+34,600
| +461% | +$1.32M |
|
2446
Direxion Daily Technology Bear 3x ETF
TECS
$72.5M
| $1.2M | ﹤0.01% |
216
+205
| +1,864% | +$808K |
|
2447
PUT
Appian
APPN
$1.88B
| $1.2M | ﹤0.01% |
29,300
-20,600
| -41% | -$1,000K |
|
2448
CALL
Portillo's
PTLO
$338M
| $1.2M | ﹤0.01% |
60,700
+17,300
| +40% | +$381K |
|
2449
PUT
Nokia
NOK
$51.8B
| $1.19M | ﹤0.01% |
279,800
-75,800
| -21% | -$368K |
|
|
NNDM
2450
CALL
Nano Dimension
NNDM
$312M
| $1.19M | ﹤0.01% |
499,000
+85,100
| +21% | +$260K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.