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 | |
|---|---|---|---|---|---|---|
4551
American Coastal Insurance
ACIC
$536M
| $192K | ﹤0.01% |
17,044
-11,188
| -40% | -$125K |
|
|
MRSN
4552
CALL
DELISTED
Mersana Therapeutics
MRSN
| $192K | ﹤0.01% |
4,080
-3,856
| -49% | -$170K |
|
4553
CALL
Teekay Tankers
TNK
$2.71B
| $192K | ﹤0.01% |
3,300
-22,500
| -87% | -$1.33M |
|
|
LGF.B
4554
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $192K | ﹤0.01% |
26,900
+2,600
| +11% | +$19.5K |
|
|
LGF.A
4555
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $192K | ﹤0.01% |
+24,541
| New | +$205K |
|
4556
Brookfield Renewable
BEPC
$5.86B
| $191K | ﹤0.01% |
5,859
+5,566
| +1,900% | +$161K |
|
4557
Brookfield Infrastructure Partners
BIP
$19.6B
| $191K | ﹤0.01% |
5,453
-1,754
| -24% | -$55.1K |
|
4558
Camtek
CAMT
$5.92B
| $191K | ﹤0.01% |
2,402
-10,692
| -82% | -$1.04M |
|
4559
CALL
Corvus Pharmaceuticals
CRVS
$1.1B
| $191K | ﹤0.01% |
36,300
+24,400
| +205% | +$87.6K |
|
|
KLG
4560
PUT
DELISTED
WK Kellogg Co
KLG
| $191K | ﹤0.01% |
11,200
+1,700
| +18% | +$29.2K |
|
4561
PUT
POET Technologies
POET
$1.1B
| $191K | ﹤0.01% |
43,200
+38,600
| +839% | +$121K |
|
|
SLNO
4562
PUT
DELISTED
Soleno Therapeutics
SLNO
| $191K | ﹤0.01% |
3,800
+1,500
| +65% | +$71.8K |
|
|
DHC
4563
CALL
Diversified Healthcare Trust
DHC
$2.15B
| $190K | ﹤0.01% |
45,400
+5,500
| +14% | +$18.5K |
|
4564
CALL
FNB Corp
FNB
$6.76B
| $190K | ﹤0.01% |
13,500
-8,400
| -38% | -$120K |
|
4565
PUT
Gaming and Leisure Properties
GLPI
$13B
| $190K | ﹤0.01% |
3,700
+2,400
| +185% | +$119K |
|
4566
CALL
Gray Television
GTN
$437M
| $190K | ﹤0.01% |
35,500
+30,200
| +570% | +$156K |
|
4567
James River Group Holdings
JRVR
$219M
| $190K | ﹤0.01% |
+30,420
| New | +$223K |
|
|
DMC
4568
PUT
Del Monte Corp
DMC
$1.42B
| $189K | ﹤0.01% |
6,400
-7,800
| -55% | -$207K |
|
|
FINV
4569
CALL
FinVolution Group
FINV
$1.17B
| $189K | ﹤0.01% |
30,700
+27,300
| +803% | +$145K |
|
4570
PUT
Fortive
FTV
$18B
| $189K | ﹤0.01% |
3,185
-47,639
| -94% | -$2.62M |
|
4571
CALL
Pulse Biosciences
PLSE
$2.37B
| $189K | ﹤0.01% |
10,800
-5,600
| -34% | -$95.5K |
|
|
NSA
4572
DELISTED
National Storage Affiliates Trust
NSA
| $188K | ﹤0.01% |
+3,905
| New | +$174K |
|
4573
CALL
Ocular Therapeutix
OCUL
$1.83B
| $188K | ﹤0.01% |
21,700
+2,700
| +14% | +$22.3K |
|
4574
PUT
OR Royalties Inc
OR
$5.53B
| $188K | ﹤0.01% |
10,200
-21,200
| -68% | -$367K |
|
4575
CALL
Quad
QUAD
$479M
| $188K | ﹤0.01% |
41,500
-3,200
| -7% | -$15.8K |
|
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.