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 | |
|---|---|---|---|---|---|---|
5676
CALL
Ryan Specialty Holdings
RYAN
$5.82B
| $89K | ﹤0.01% |
+2,200
| New | +$92.8K |
|
|
SKYT
5677
PUT
DELISTED
SkyWater Technology
SKYT
| $89K | ﹤0.01% |
11,700
-12,900
| -52% | -$152K |
|
|
EMBK
5678
PUT
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $89K | ﹤0.01% |
+12,100
| New | +$120K |
|
|
INTZ
5679
PUT
DELISTED
INTRUSION INC NEW
INTZ
| $89K | ﹤0.01% |
18,600
+300
| +2% | +$1.44K |
|
5680
Agree Realty
ADC
$9.45B
| $88K | ﹤0.01% |
+1,316
| New | +$98.9K |
|
5681
PUT
Brilliant Earth
BRLT
$16.9M
| $88K | ﹤0.01% |
15,400
+10,200
| +196% | +$65.9K |
|
5682
PUT
Compass Diversified
CODI
$822M
| $88K | ﹤0.01% |
4,900
+2,200
| +81% | +$48.4K |
|
5683
Coherent
COHR
$64.7B
| $88K | ﹤0.01% |
+2,548
| New | +$122K |
|
|
CTLP
5684
CALL
DELISTED
Cantaloupe
CTLP
| $88K | ﹤0.01% |
25,300
+6,600
| +35% | +$36.2K |
|
5685
PUT
Donaldson
DCI
$11.3B
| $88K | ﹤0.01% |
1,800
+600
| +50% | +$31.3K |
|
5686
CALL
National Vision
EYE
$1.84B
| $88K | ﹤0.01% |
+2,700
| New | +$87.7K |
|
5687
CALL
Fennec Pharmaceuticals
FENC
$363M
| $88K | ﹤0.01% |
10,900
+10,600
| +3,533% | +$72.8K |
|
5688
Goldgroup Mining Inc.
GORO
$164M
| $88K | ﹤0.01% |
53,773
+16,678
| +45% | +$28.3K |
|
5689
CALL
Helix Energy Solutions
HLX
$1.38B
| $88K | ﹤0.01% |
23,000
-25,000
| -52% | -$94.8K |
|
|
LADR
5690
PUT
Ladder Capital
LADR
$1.2B
| $88K | ﹤0.01% |
9,900
-20,500
| -67% | -$226K |
|
5691
CALL
Mercury Insurance
MCY
$6.04B
| $88K | ﹤0.01% |
3,100
-1,700
| -35% | -$61.6K |
|
5692
PUT
Pitney Bowes
PBI
$2.51B
| $88K | ﹤0.01% |
37,800
-5,400
| -13% | -$17.3K |
|
5693
PUT
LiveRamp
RAMP
$2.3B
| $88K | ﹤0.01% |
4,900
+2,500
| +104% | +$57.8K |
|
5694
Schwab US Large-Cap Growth ETF
SCHG
$62.3B
| $88K | ﹤0.01% |
6,348
+1,092
| +21% | +$17.1K |
|
5695
CALL
Semtech
SMTC
$11.4B
| $88K | ﹤0.01% |
3,000
+1,500
| +100% | +$70.3K |
|
5696
Synopsys
SNPS
$77.1B
| $88K | ﹤0.01% |
+291
| New | +$98.5K |
|
|
INFI
5697
CALL
DELISTED
Infinity Pharmaceuticals, Inc.
INFI
| $88K | ﹤0.01% |
74,100
-19,900
| -21% | -$21.5K |
|
|
EAR
5698
CALL
DELISTED
Eargo, Inc. Common Stock
EAR
| $88K | ﹤0.01% |
4,220
+1,735
| +70% | +$46.8K |
|
|
PIPP
5699
PUT
DELISTED
Pine Island Acquisition Corp.
PIPP
| $88K | ﹤0.01% |
8,900
-6,500
| -42% | -$64.5K |
|
5700
CALL
ABM Industries
ABM
$2.87B
| $87K | ﹤0.01% |
2,300
+1,400
| +156% | +$61.3K |
|
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.