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 | |
|---|---|---|---|---|---|---|
2976
PUT
Children's Place
PLCE
$55.8M
| $759K | ﹤0.01% |
24,600
+3,500
| +17% | +$147K |
|
2977
CALL
Hormel Foods
HRL
$14.1B
| $758K | ﹤0.01% |
16,700
-38,200
| -70% | -$1.85M |
|
2978
PUT
Revvity
RVTY
$12.4B
| $758K | ﹤0.01% |
6,300
+5,800
| +1,160% | +$818K |
|
2979
PUT
Ituran Location and Control
ITRN
$1.08B
| $756K | ﹤0.01% |
32,400
| – | – |
|
|
ATSG
2980
CALL
DELISTED
Air Transport Services Group
ATSG
| $756K | ﹤0.01% |
31,400
-27,600
| -47% | -$801K |
|
2981
Chegg
CHGG
$121M
| $755K | ﹤0.01% |
35,841
+21,884
| +157% | +$453K |
|
2982
CALL
Newell Brands
NWL
$2.24B
| $754K | ﹤0.01% |
54,300
-64,300
| -54% | -$1.2M |
|
|
INFN
2983
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $754K | ﹤0.01% |
155,900
+10,800
| +7% | +$59.2K |
|
2984
CALL
Carpenter Technology
CRS
$27.8B
| $753K | ﹤0.01% |
24,200
-2,100
| -8% | -$69.5K |
|
|
MMP
2985
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $753K | ﹤0.01% |
15,850
-15,728
| -50% | -$789K |
|
2986
TG Therapeutics
TGTX
$8.4B
| $752K | ﹤0.01% |
127,028
-33,381
| -21% | -$219K |
|
2987
PUT
QuidelOrtho
QDEL
$1.14B
| $750K | ﹤0.01% |
10,500
-1,000
| -9% | -$89.5K |
|
|
ERF
2988
PUT
DELISTED
Enerplus Corporation
ERF
| $749K | ﹤0.01% |
52,900
-42,000
| -44% | -$589K |
|
2989
BioMarin Pharmaceuticals
BMRN
$12B
| $748K | ﹤0.01% |
8,825
-2,397
| -21% | -$213K |
|
2990
PUT
Allot
ALLT
$373M
| $747K | ﹤0.01% |
190,700
+187,800
| +6,476% | +$892K |
|
2991
PUT
Bain Capital Specialty
BCSF
$833M
| $746K | ﹤0.01% |
62,200
+55,600
| +842% | +$793K |
|
|
BGFV
2992
PUT
DELISTED
Big 5 Sporting Goods
BGFV
| $745K | ﹤0.01% |
69,400
-700
| -1% | -$8.47K |
|
|
MAG
2993
CALL
DELISTED
MAG Silver
MAG
| $745K | ﹤0.01% |
59,700
+2,700
| +5% | +$33.4K |
|
|
MMP
2994
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $745K | ﹤0.01% |
15,700
-17,400
| -53% | -$873K |
|
|
AAWW
2995
PUT
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $745K | ﹤0.01% |
7,800
-7,500
| -49% | -$662K |
|
2996
PUT
Credit Acceptance
CACC
$5.84B
| $744K | ﹤0.01% |
1,700
-2,100
| -55% | -$1.11M |
|
2997
PUT
Alexandria Real Estate Equities
ARE
$9.41B
| $743K | ﹤0.01% |
5,300
+3,200
| +152% | +$491K |
|
2998
PUT
Kulicke & Soffa
KLIC
$4.76B
| $743K | ﹤0.01% |
19,300
-104,900
| -84% | -$4.64M |
|
2999
PUT
Radware
RDWR
$1.19B
| $743K | ﹤0.01% |
34,100
+24,400
| +252% | +$544K |
|
3000
FerroAtlántica
GSM
$628M
| $742K | ﹤0.01% |
140,568
-9,930
| -7% | -$61.5K |
|
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.