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 | |
|---|---|---|---|---|---|---|
|
YRD
6651
Yiren Digital
YRD
$93.6M
| $21K | ﹤0.01% |
+3,789
| New | +$17.6K |
|
6652
CALL
AbCellera Biologics
ABCL
$1.65B
| $20K | ﹤0.01% |
7,900
+3,200
| +68% | +$8.87K |
|
6653
PUT
Abeona Therapeutics
ABEO
$355M
| $20K | ﹤0.01% |
3,200
-1,700
| -35% | -$8.88K |
|
6654
PUT
Arcos Dorados Holdings
ARCO
$1.74B
| $20K | ﹤0.01% |
2,400
-12,300
| -84% | -$112K |
|
6655
PUT
Popular Inc
BPOP
$11B
| $20K | ﹤0.01% |
200
-3,300
| -94% | -$322K |
|
|
BPT
6656
PUT
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $20K | ﹤0.01% |
18,600
-2,200
| -11% | -$3.76K |
|
6657
PUT
Baytex Energy
BTE
$2.96B
| $20K | ﹤0.01% |
7,000
-100
| -1% | -$340 |
|
6658
CALL
BuzzFeed
BZFD
$99M
| $20K | ﹤0.01% |
7,600
-8,100
| -52% | -$21.6K |
|
6659
CALL
CuriosityStream
CURI
$148M
| $20K | ﹤0.01% |
10,900
+3,600
| +49% | +$4.91K |
|
6660
Evolution Petroleum
EPM
$133M
| $20K | ﹤0.01% |
3,894
-5,453
| -58% | -$28.8K |
|
6661
CALL
Essential Properties Realty Trust
EPRT
$6.92B
| $20K | ﹤0.01% |
600
-500
| -45% | -$15.4K |
|
|
KYNB
6662
PUT
Kyntra Bio
KYNB
$27.4M
| $20K | ﹤0.01% |
2,028
-796
| -28% | -$12K |
|
6663
Gilat Satellite Networks
GILT
$789M
| $20K | ﹤0.01% |
3,840
+50
| +1% | +$230 |
|
6664
Globus Maritime Ltd
GLBS
$61.5M
| $20K | ﹤0.01% |
10,934
+6,081
| +125% | +$10.4K |
|
6665
PUT
Harvard Bioscience
HBIO
$27.6M
| $20K | ﹤0.01% |
770
+270
| +54% | +$7.95K |
|
|
AGIG
6666
Abundia Global Impact Group
AGIG
$40.5M
| $20K | ﹤0.01% |
1,878
+441
| +31% | +$5.16K |
|
6667
CALL
Immunic
IMUX
$178M
| $20K | ﹤0.01% |
1,220
+300
| +33% | +$4.27K |
|
6668
CALL
Independence Realty Trust
IRT
$3.98B
| $20K | ﹤0.01% |
1,000
-4,300
| -81% | -$84.7K |
|
|
6669
PUT
Independence Realty Trust
IRT
$3.98B
| $20K | ﹤0.01% |
1,000
-700
| -41% | -$13.8K |
|
|
NXDR
6670
Nextdoor Holdings
NXDR
$885M
| $20K | ﹤0.01% |
8,255
-3,179
| -28% | -$8.17K |
|
6671
PUT
Lifecore Biomedical
LFCR
$162M
| $20K | ﹤0.01% |
+4,100
| New | +$21.4K |
|
6672
CALL
Lantronix
LTRX
$223M
| $20K | ﹤0.01% |
+5,000
| New | +$18.9K |
|
6673
MiMedx Group
MDXG
$630M
| $20K | ﹤0.01% |
+3,403
| New | +$22.5K |
|
6674
CALL
MYR Group
MYRG
$5.01B
| $20K | ﹤0.01% |
200
-1,100
| -85% | -$125K |
|
6675
CALL
NB Bancorp
NBBK
$993M
| $20K | ﹤0.01% |
+1,100
| New | +$19.4K |
|
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.