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 | |
|---|---|---|---|---|---|---|
4851
Alkermes
ALKS
$8.11B
| $144K | ﹤0.01% |
+5,173
| New | +$138K |
|
4852
Aura Biosciences
AURA
$725M
| $144K | ﹤0.01% |
+16,258
| New | +$139K |
|
4853
PUT
Perella Weinberg Partners
PWP
$1.08B
| $144K | ﹤0.01% |
7,500
| – | – |
|
4854
Relay Therapeutics
RLAY
$4B
| $144K | ﹤0.01% |
20,426
+18,017
| +748% | +$135K |
|
4855
CALL
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $144K | ﹤0.01% |
6,400
-17,000
| -73% | -$623K |
|
4856
CALL
Valmont Industries
VMI
$8.81B
| $144K | ﹤0.01% |
500
+300
| +150% | +$84K |
|
|
INFN
4857
PUT
DELISTED
Infinera Corporation Common Stock
INFN
| $144K | ﹤0.01% |
21,400
-20,900
| -49% | -$129K |
|
|
EXAI
4858
CALL
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $144K | ﹤0.01% |
29,700
+19,000
| +178% | +$99.5K |
|
|
AISP
4859
CALL
Airship AI Holdings
AISP
$58.9M
| $143K | ﹤0.01% |
62,400
-67,600
| -52% | -$219K |
|
4860
CALL
Butterfly Network
BFLY
$1.86B
| $143K | ﹤0.01% |
81,300
+50,000
| +160% | +$62.6K |
|
4861
PUT
Cardlytics
CDLX
$22.2M
| $143K | ﹤0.01% |
4,470
-7,780
| -64% | -$432K |
|
4862
CALL
Intapp
INTA
$2.44B
| $143K | ﹤0.01% |
3,000
-1,400
| -32% | -$56.5K |
|
4863
PUT
Mercer International
MERC
$40.5M
| $143K | ﹤0.01% |
21,200
+12,500
| +144% | +$86.5K |
|
4864
PUT
NovoCure
NVCR
$1.77B
| $143K | ﹤0.01% |
9,200
-5,700
| -38% | -$103K |
|
|
PLL
4865
DELISTED
Piedmont Lithium
PLL
| $143K | ﹤0.01% |
16,099
+9,307
| +137% | +$84.1K |
|
4866
CALL
Talos Energy
TALO
$2.38B
| $143K | ﹤0.01% |
13,900
-42,200
| -75% | -$481K |
|
|
TRTX
4867
TPG RE Finance Trust
TRTX
$630M
| $143K | ﹤0.01% |
16,789
-517
| -3% | -$4.54K |
|
4868
CALL
ABM Industries
ABM
$2.89B
| $142K | ﹤0.01% |
2,700
-1,100
| -29% | -$58.2K |
|
4869
Etsy
ETSY
$8.12B
| $142K | ﹤0.01% |
2,561
-52,539
| -95% | -$2.98M |
|
4870
Cedar Fair
FUN
$1.88B
| $142K | ﹤0.01% |
3,542
-3,009
| -46% | -$138K |
|
4871
PUT
Granite Construction
GVA
$5.16B
| $142K | ﹤0.01% |
1,800
+1,700
| +1,700% | +$119K |
|
|
SII
4872
PUT
Sprott
SII
$2.68B
| $142K | ﹤0.01% |
3,300
-6,800
| -67% | -$288K |
|
4873
PUT
Spectrum Brands
SPB
$2.03B
| $142K | ﹤0.01% |
1,500
-2,500
| -63% | -$221K |
|
4874
PUT
Essential Utilities
WTRG
$11.5B
| $142K | ﹤0.01% |
3,700
+500
| +16% | +$19.6K |
|
4875
CALL
DT Midstream
DTM
$13.9B
| $141K | ﹤0.01% |
1,800
-100
| -5% | -$7.46K |
|
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.