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 | |
|---|---|---|---|---|---|---|
4951
CALL
Heartland Express
HTLD
$986M
| $131K | ﹤0.01% |
10,700
-5,400
| -34% | -$66.3K |
|
4952
CALL
Revolution Medicines
RVMD
$40.9B
| $131K | ﹤0.01% |
2,900
+1,500
| +107% | +$65.3K |
|
|
BLUE
4953
CALL
DELISTED
bluebird bio
BLUE
| $130K | ﹤0.01% |
12,535
+9,825
| +363% | +$163K |
|
4954
PUT
Columbia Banking Systems
COLB
$8.84B
| $130K | ﹤0.01% |
5,000
-200
| -4% | -$4.76K |
|
|
ELME
4955
CALL
Elme Communities
ELME
$144M
| $130K | ﹤0.01% |
+7,400
| New | +$126K |
|
4956
CALL
Energizer
ENR
$1.44B
| $130K | ﹤0.01% |
4,100
+2,400
| +141% | +$72.3K |
|
4957
CALL
HealthEquity
HQY
$8.44B
| $130K | ﹤0.01% |
1,600
+300
| +23% | +$23.1K |
|
4958
CALL
Karyopharm Therapeutics
KPTI
$159M
| $130K | ﹤0.01% |
10,480
-873
| -8% | -$10.8K |
|
4959
CALL
Wolverine World Wide
WWW
$1.64B
| $130K | ﹤0.01% |
7,500
-89,800
| -92% | -$1.24M |
|
|
NVEI
4960
CALL
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $130K | ﹤0.01% |
3,900
+100
| +3% | +$3.3K |
|
4961
PUT
AerSale
ASLE
$291M
| $129K | ﹤0.01% |
25,600
+5,000
| +24% | +$28.9K |
|
4962
PUT
JELD-WEN Holding
JELD
$117M
| $129K | ﹤0.01% |
8,200
-21,600
| -72% | -$317K |
|
4963
PUT
Mativ Holdings
MATV
$472M
| $129K | ﹤0.01% |
7,600
+900
| +13% | +$15.8K |
|
4964
CALL
First Trust Exchange-Traded Fund VI Multi-Asset Diversified Income Index Fund
MDIV
$430M
| $129K | ﹤0.01% |
1,900
+1,300
| +217% | +$21.1K |
|
|
SCS
4965
PUT
DELISTED
Steelcase
SCS
| $129K | ﹤0.01% |
9,600
-16,400
| -63% | -$220K |
|
|
SEE
4966
DELISTED
Sealed Air
SEE
| $129K | ﹤0.01% |
+3,578
| New | +$125K |
|
|
SPTN
4967
PUT
DELISTED
SpartanNash
SPTN
| $129K | ﹤0.01% |
5,800
-6,200
| -52% | -$128K |
|
4968
PACS Group
PACS
$7.44B
| $129K | ﹤0.01% |
3,237
+2,935
| +972% | +$107K |
|
4969
PUT
Adient
ADNT
$1.72B
| $128K | ﹤0.01% |
5,700
+1,000
| +21% | +$22.9K |
|
4970
CALL
Bread Financial
BFH
$4.47B
| $128K | ﹤0.01% |
2,700
-5,700
| -68% | -$290K |
|
4971
VanEck ChiNext Innovators ETF
CNXT
$105M
| $128K | ﹤0.01% |
+4,363
| New | +$92K |
|
|
LTC
4972
CALL
LTC Properties
LTC
$2.06B
| $128K | ﹤0.01% |
3,500
-9,400
| -73% | -$341K |
|
4973
Novartis
NVS
$301B
| $128K | ﹤0.01% |
+1,113
| New | +$126K |
|
4974
Schrodinger
SDGR
$1.15B
| $128K | ﹤0.01% |
6,918
+3,330
| +93% | +$68.4K |
|
4975
Cullinan Oncology
CGEM
$1.08B
| $127K | ﹤0.01% |
+7,623
| New | +$135K |
|
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.