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 | |
|---|---|---|---|---|---|---|
2326
PUT
Calix
CALX
$2.33B
| $1.36M | ﹤0.01% |
22,200
+11,000
| +98% | +$588K |
|
2327
PUT
Illinois Tool Works
ITW
$81.9B
| $1.35M | ﹤0.01% |
7,500
+700
| +10% | +$138K |
|
2328
PUT
Royalty Pharma
RPRX
$26.2B
| $1.35M | ﹤0.01% |
33,600
+23,300
| +226% | +$995K |
|
2329
CALL
Builders FirstSource
BLDR
$7.82B
| $1.35M | ﹤0.01% |
22,900
-5,400
| -19% | -$338K |
|
2330
CALL
Canadian National Railway
CNI
$78B
| $1.35M | ﹤0.01% |
12,500
-52,300
| -81% | -$6.23M |
|
2331
PUT
Republic Services
RSG
$66.9B
| $1.35M | ﹤0.01% |
9,900
+4,500
| +83% | +$629K |
|
2332
CALL
Kulicke & Soffa
KLIC
$5.02B
| $1.34M | ﹤0.01% |
34,900
-25,100
| -42% | -$1.11M |
|
2333
CALL
OneMain Financial
OMF
$7.04B
| $1.34M | ﹤0.01% |
45,500
+2,600
| +6% | +$95.7K |
|
2334
PUT
Carlyle Group
CG
$16.6B
| $1.34M | ﹤0.01% |
51,900
-8,700
| -14% | -$286K |
|
2335
CALL
Booz Allen Hamilton
BAH
$8.7B
| $1.34M | ﹤0.01% |
14,500
+11,000
| +314% | +$1.04M |
|
2336
CALL
LyondellBasell Industries
LYB
$19B
| $1.34M | ﹤0.01% |
17,800
-4,600
| -21% | -$389K |
|
2337
PUT
United States Gasoline Fund
UGA
$143M
| $1.34M | ﹤0.01% |
25,400
+3,900
| +18% | +$227K |
|
2338
PUT
Ametek
AME
$55.1B
| $1.34M | ﹤0.01% |
11,800
+11,400
| +2,850% | +$1.37M |
|
2339
Strategy Inc
MSTR
$35.9B
| $1.34M | ﹤0.01% |
62,950
+42,040
| +201% | +$1.05M |
|
2340
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $1.33M | ﹤0.01% |
12,900
-1,200
| -9% | -$114K |
|
2341
CALL
indie Semiconductor
INDI
$699M
| $1.33M | ﹤0.01% |
182,000
-63,000
| -26% | -$466K |
|
2342
PUT
PTC
PTC
$14.5B
| $1.33M | ﹤0.01% |
12,700
-40,200
| -76% | -$4.59M |
|
2343
PUT
Public Service Enterprise Group
PEG
$39.4B
| $1.33M | ﹤0.01% |
23,600
+3,300
| +16% | +$212K |
|
2344
CALL
Tecnoglass
TGLS
$2B
| $1.33M | ﹤0.01% |
63,200
+59,800
| +1,759% | +$1.3M |
|
2345
Trump Media & Technology Group
DJT
$2.63B
| $1.33M | ﹤0.01% |
78,916
+35,037
| +80% | +$924K |
|
2346
Franklin Resources
BEN
$17.2B
| $1.32M | ﹤0.01% |
+61,566
| New | +$1.58M |
|
2347
ProShares UltraPro Dow 30
UDOW
$828M
| $1.32M | ﹤0.01% |
+68,614
| New | +$1.83M |
|
2348
PUT
Rithm Capital
RITM
$5.15B
| $1.32M | ﹤0.01% |
180,500
+45,400
| +34% | +$432K |
|
2349
CALL
Warby Parker
WRBY
$3.06B
| $1.32M | ﹤0.01% |
99,000
-300
| -0.3% | -$4K |
|
|
SYRS
2350
CALL
DELISTED
Syros Pharmaceuticals, Inc. Common Stock
SYRS
| $1.32M | ﹤0.01% |
205,100
+204,870
| +89,074% | +$1.66M |
|
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.