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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2576
PUT
Bentley Systems
BSY
$9.54B
| $883K | ﹤0.01% |
23,900
-31,400
| -57% | -$1.14M |
|
2577
CALL
Ingersoll Rand
IR
$33B
| $883K | ﹤0.01% |
16,900
-33,500
| -66% | -$1.71M |
|
2578
CALL
Barclays
BCS
$94.1B
| $882K | ﹤0.01% |
113,200
+21,700
| +24% | +$158K |
|
2579
Aon
AON
$77.3B
| $881K | ﹤0.01% |
+2,936
| New | +$858K |
|
2580
Digimarc Corp
DMRC
$133M
| $881K | ﹤0.01% |
47,652
+21,485
| +82% | +$401K |
|
|
MAG
2581
CALL
DELISTED
MAG Silver
MAG
| $881K | ﹤0.01% |
56,400
-3,300
| -6% | -$48.1K |
|
2582
CALL
Tronox
TROX
$995M
| $881K | ﹤0.01% |
64,300
+9,600
| +18% | +$128K |
|
2583
Advance Auto Parts
AAP
$3.37B
| $880K | ﹤0.01% |
5,986
+1,796
| +43% | +$291K |
|
2584
PUT
United Natural Foods
UNFI
$3.01B
| $878K | ﹤0.01% |
22,700
-19,000
| -46% | -$786K |
|
|
HEP
2585
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $878K | ﹤0.01% |
48,500
+41,200
| +564% | +$753K |
|
|
UNIT
2586
PUT
Uniti Group
UNIT
$2.63B
| $877K | ﹤0.01% |
158,700
+156,300
| +6,513% | +$1.07M |
|
2587
PUT
AllianceBernstein
AB
$3.47B
| $876K | ﹤0.01% |
25,500
-31,900
| -56% | -$1.18M |
|
2588
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $876K | ﹤0.01% |
16,200
+800
| +5% | +$23.1K |
|
2589
CALL
Huntington Ingalls Industries
HII
$11.3B
| $876K | ﹤0.01% |
3,800
+500
| +15% | +$118K |
|
|
SAND
2590
CALL
DELISTED
Sandstorm Gold
SAND
| $876K | ﹤0.01% |
166,700
-87,700
| -34% | -$448K |
|
|
IRBT
2591
PUT
DELISTED
iRobot
IRBT
| $875K | ﹤0.01% |
18,200
+6,700
| +58% | +$354K |
|
2592
PUT
Sunoco
SUN
$14.2B
| $874K | ﹤0.01% |
20,300
-48,800
| -71% | -$2.06M |
|
2593
Zillow
ZG
$7.02B
| $874K | ﹤0.01% |
28,034
+13,968
| +99% | +$457K |
|
2594
Teucrium Wheat Fund
WEAT
$314M
| $873K | ﹤0.01% |
21,888
+18,100
| +478% | +$751K |
|
2595
CALL
Insteel Industries
IIIN
$633M
| $872K | ﹤0.01% |
31,700
+9,000
| +40% | +$247K |
|
2596
CALL
EPR Properties
EPR
$4.86B
| $871K | ﹤0.01% |
23,100
-11,500
| -33% | -$448K |
|
2597
PUT
IMAX
IMAX
$2.38B
| $869K | ﹤0.01% |
59,300
-64,500
| -52% | -$941K |
|
2598
CALL
Mobileye
MBLY
$2.03B
| $869K | ﹤0.01% |
+24,800
| New | +$753K |
|
|
SQSP
2599
CALL
DELISTED
Squarespace, Inc.
SQSP
| $869K | ﹤0.01% |
39,200
-34,800
| -47% | -$733K |
|
|
ESPR
2600
DELISTED
Esperion Therapeutics
ESPR
| $868K | ﹤0.01% |
+139,427
| New | +$997K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.