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 | |
|---|---|---|---|---|---|---|
|
3026
Meta Platforms (Facebook)
META
$1.51T
| $728K | ﹤0.01% |
5,370
-293,509
| -98% | -$47.6M |
|
3027
CALL
A10 Networks
ATEN
$2.25B
| $727K | ﹤0.01% |
54,800
+3,300
| +6% | +$47K |
|
3028
DaVita
DVA
$15.4B
| $726K | ﹤0.01% |
8,778
+7,278
| +485% | +$638K |
|
3029
CALL
Enanta Pharmaceuticals
ENTA
$367M
| $726K | ﹤0.01% |
14,000
-700
| -5% | -$40.9K |
|
3030
PNC Financial Services
PNC
$100B
| $726K | ﹤0.01% |
+4,864
| New | +$788K |
|
|
UDMY
3031
DELISTED
Udemy
UDMY
| $726K | ﹤0.01% |
+60,112
| New | +$802K |
|
3032
AeroVironment
AVAV
$7.91B
| $725K | ﹤0.01% |
8,699
+1,059
| +14% | +$94.7K |
|
3033
Huazhu Hotels Group
HTHT
$13.2B
| $724K | ﹤0.01% |
21,587
+8,332
| +63% | +$315K |
|
3034
CALL
Nektar Therapeutics
NKTR
$2.39B
| $724K | ﹤0.01% |
15,093
-1,274
| -8% | -$75.8K |
|
3035
CALL
Schrodinger
SDGR
$1.14B
| $724K | ﹤0.01% |
29,000
+9,900
| +52% | +$291K |
|
3036
PUT
Ericsson
ERIC
$32.7B
| $722K | ﹤0.01% |
125,800
+42,800
| +52% | +$307K |
|
|
IGMS
3037
DELISTED
IGM Biosciences
IGMS
| $722K | ﹤0.01% |
31,768
+3,126
| +11% | +$63.1K |
|
3038
CALL
NextCure
NXTC
$22.1M
| $722K | ﹤0.01% |
21,900
-11,958
| -35% | -$609K |
|
|
VSXY
3039
CALL
Victoria's Secret
VSXY
$7.1B
| $722K | ﹤0.01% |
24,800
-17,300
| -41% | -$583K |
|
|
VSTO
3040
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $722K | ﹤0.01% |
29,700
+5,600
| +23% | +$159K |
|
3041
CALL
Equifax
EFX
$22B
| $720K | ﹤0.01% |
4,200
+1,700
| +68% | +$333K |
|
3042
PUT
Roper Technologies
ROP
$38.7B
| $719K | ﹤0.01% |
2,000
-3,200
| -62% | -$1.3M |
|
|
RUTH
3043
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $719K | ﹤0.01% |
42,700
-31,900
| -43% | -$565K |
|
3044
Calumet Specialty Products
CLMT
$3.61B
| $718K | ﹤0.01% |
56,067
+55,156
| +6,054% | +$791K |
|
3045
JetBlue
JBLU
$2.23B
| $718K | ﹤0.01% |
108,349
-123,799
| -53% | -$1.01M |
|
|
RFP
3046
DELISTED
Resolute Forest Products Inc.
RFP
| $718K | ﹤0.01% |
35,904
+15,159
| +73% | +$304K |
|
3047
PUT
Aramark
ARMK
$15.1B
| $717K | ﹤0.01% |
31,855
+13,711
| +76% | +$341K |
|
3048
Kanzhun
BZ
$7.07B
| $716K | ﹤0.01% |
42,431
-37,228
| -47% | -$840K |
|
|
HIMX
3049
PUT
Himax Technologies
HIMX
$2.09B
| $716K | ﹤0.01% |
148,000
-241,000
| -62% | -$1.54M |
|
|
PMT
3050
CALL
PennyMac Mortgage Investment
PMT
$854M
| $716K | ﹤0.01% |
60,800
+41,600
| +217% | +$608K |
|
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.