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 | |
|---|---|---|---|---|---|---|
5951
Knowles
KN
$3.11B
| $46K | ﹤0.01% |
2,603
+2,072
| +390% | +$36.7K |
|
5952
PUT
Malibu Boats
MBUU
$537M
| $46K | ﹤0.01% |
1,200
+700
| +140% | +$25.2K |
|
5953
Virtus InfraCap US Preferred Stock ETF
PFFA
$2.43B
| $46K | ﹤0.01% |
+2,035
| New | +$44.4K |
|
5954
Radiant Logistics
RLGT
$392M
| $46K | ﹤0.01% |
7,161
-5,150
| -42% | -$31.3K |
|
5955
PUT
Stoke Therapeutics
STOK
$1.81B
| $46K | ﹤0.01% |
3,800
+2,000
| +111% | +$28.3K |
|
|
TRTX
5956
CALL
TPG RE Finance Trust
TRTX
$613M
| $46K | ﹤0.01% |
5,500
+300
| +6% | +$2.63K |
|
5957
Veru
VERU
$35.2M
| $46K | ﹤0.01% |
6,000
-2,437
| -29% | -$21K |
|
5958
PUT
Valvoline
VVV
$4.88B
| $46K | ﹤0.01% |
1,100
| – | – |
|
5959
PUT
Zumiez
ZUMZ
$330M
| $46K | ﹤0.01% |
2,200
-9,800
| -82% | -$235K |
|
|
HUSE
5960
CALL
DELISTED
Strategy Shares US Market Rotation Strategy ETF
HUSE
| $46K | ﹤0.01% |
2,100
+1,800
| +600% | +$39.4K |
|
5961
CALL
Adtran
ADTN
$688M
| $45K | ﹤0.01% |
7,600
+2,000
| +36% | +$11.1K |
|
5962
PUT
Ameresco
AMRC
$1.1B
| $45K | ﹤0.01% |
1,200
+100
| +9% | +$3.09K |
|
5963
CALL
American Outdoor Brands
AOUT
$153M
| $45K | ﹤0.01% |
4,900
+4,500
| +1,125% | +$40K |
|
5964
CALL
Autohome
ATHM
$2.63B
| $45K | ﹤0.01% |
1,400
-1,600
| -53% | -$41.7K |
|
5965
PUT
BRC Inc
BRCC
$121M
| $45K | ﹤0.01% |
13,300
+4,600
| +53% | +$21.1K |
|
5966
CoinShares ETF Trust CoinShares Bitcoin and Ether ETF
BTF
$13.6M
| $45K | ﹤0.01% |
560
+155
| +38% | +$13.1K |
|
5967
PUT
CG Oncology
CGON
$6.22B
| $45K | ﹤0.01% |
1,200
+500
| +71% | +$17.5K |
|
5968
PUT
Cooper-Standard Automotive
CPS
$498M
| $45K | ﹤0.01% |
3,300
-400
| -11% | -$5.56K |
|
|
CVAC
5969
PUT
DELISTED
CureVac
CVAC
| $45K | ﹤0.01% |
15,600
-3,200
| -17% | -$10.5K |
|
|
CVGW
5970
CALL
DELISTED
Calavo Growers
CVGW
| $45K | ﹤0.01% |
1,600
-1,600
| -50% | -$39.1K |
|
5971
PUT
Endava
DAVA
$151M
| $45K | ﹤0.01% |
1,800
+100
| +6% | +$3K |
|
5972
CALL
iShares Core Dividend ETF
DIVB
$1.68B
| $45K | ﹤0.01% |
1,000
-1,300
| -57% | -$60.3K |
|
5973
PUT
Dorman Products
DORM
$3.93B
| $45K | ﹤0.01% |
400
-3,200
| -89% | -$337K |
|
5974
CALL
Heritage Financial
HFWA
$1.2B
| $45K | ﹤0.01% |
2,100
| – | – |
|
|
HSII
5975
DELISTED
Heidrick & Struggles
HSII
| $45K | ﹤0.01% |
1,179
+90
| +8% | +$3.25K |
|
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.