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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
JHG
5976
CALL
DELISTED
Janus Henderson
JHG
| $45K | ﹤0.01% |
+1,200
| New | +$43.4K |
|
5977
Jones Lang LaSalle
JLL
$16.9B
| $45K | ﹤0.01% |
169
+129
| +323% | +$31.3K |
|
5978
PUT
Kinetik
KNTK
$3.69B
| $45K | ﹤0.01% |
1,000
-11,200
| -92% | -$485K |
|
5979
CALL
Kopin
KOPN
$671M
| $45K | ﹤0.01% |
62,600
-3,600
| -5% | -$3.3K |
|
5980
PUT
American Century Diversified Corporate Bond ETF
KORP
$870M
| $45K | ﹤0.01% |
500
-4,000
| -89% | -$190K |
|
5981
PUT
NovaGold Resources
NG
$2.56B
| $45K | ﹤0.01% |
11,000
-1,400
| -11% | -$5.94K |
|
5982
CALL
Pricesmart
PSMT
$5.96B
| $45K | ﹤0.01% |
500
-1,600
| -76% | -$138K |
|
5983
PUT
FreightCar America
RAIL
$263M
| $45K | ﹤0.01% |
4,200
+3,200
| +320% | +$18.7K |
|
5984
PUT
Real Brokerage
REAX
$364M
| $45K | ﹤0.01% |
8,200
+6,200
| +310% | +$35.2K |
|
5985
SGHC Ltd
SGHC
$7.14B
| $45K | ﹤0.01% |
12,637
-12,397
| -50% | -$42.7K |
|
5986
Shopify
SHOP
$158B
| $45K | ﹤0.01% |
567
-47,213
| -99% | -$3.26M |
|
5987
CALL
UDR
UDR
$12.2B
| $45K | ﹤0.01% |
1,000
-46,900
| -98% | -$2.01M |
|
5988
CALL
Universal Technical Institute
UTI
$2.2B
| $45K | ﹤0.01% |
2,800
-103,900
| -97% | -$1.78M |
|
|
VTYX
5989
PUT
DELISTED
Ventyx Biosciences
VTYX
| $45K | ﹤0.01% |
20,900
-56,800
| -73% | -$131K |
|
|
CTEV
5990
CALL
Claritev Corp
CTEV
$411M
| $45K | ﹤0.01% |
5,900
+5,772
| +4,509% | +$67.8K |
|
|
VTNR
5991
PUT
DELISTED
Vertex Energy, Inc
VTNR
| $45K | ﹤0.01% |
34,700
+200
| +0.6% | +$111 |
|
5992
PUT
Atour Lifestyle Holdings
ATAT
$4.67B
| $44K | ﹤0.01% |
+1,700
| New | +$31.6K |
|
5993
PUT
CVRx
CVRX
$141M
| $44K | ﹤0.01% |
+5,000
| New | +$45.5K |
|
|
DAWN
5994
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $44K | ﹤0.01% |
3,200
-7,500
| -70% | -$107K |
|
5995
PUT
Donaldson
DCI
$10.7B
| $44K | ﹤0.01% |
600
-800
| -57% | -$57.8K |
|
5996
CALL
Evertec
EVTC
$1.96B
| $44K | ﹤0.01% |
+1,300
| New | +$43.3K |
|
5997
First Industrial Realty Trust
FR
$8.7B
| $44K | ﹤0.01% |
792
+669
| +544% | +$36K |
|
5998
PUT
Gladstone Investment Corp
GAIN
$652M
| $44K | ﹤0.01% |
3,100
-1,300
| -30% | -$17.5K |
|
|
GTY
5999
CALL
Getty Realty Corp
GTY
$2.1B
| $44K | ﹤0.01% |
1,400
-6,100
| -81% | -$187K |
|
6000
PUT
IDEAYA Biosciences
IDYA
$3.47B
| $44K | ﹤0.01% |
1,400
+400
| +40% | +$15.2K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.