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 | |
|---|---|---|---|---|---|---|
4926
CALL
Cemex
CX
$17.2B
| $134K | ﹤0.01% |
22,100
+700
| +3% | +$4.39K |
|
|
HUYA
4927
PUT
Huya Inc
HUYA
$570M
| $134K | ﹤0.01% |
26,300
+18,500
| +237% | +$79.5K |
|
4928
CALL
MarineMax
HZO
$772M
| $134K | ﹤0.01% |
3,800
+1,000
| +36% | +$32.6K |
|
4929
PUT
Lakeland Industries
LAKE
$109M
| $134K | ﹤0.01% |
6,700
+4,100
| +158% | +$91.9K |
|
4930
POET Technologies
POET
$1.26B
| $134K | ﹤0.01% |
30,328
+22,443
| +285% | +$70.1K |
|
4931
CALL
Prime Medicine
PRME
$545M
| $134K | ﹤0.01% |
34,700
+12,500
| +56% | +$57.9K |
|
4932
CALL
Rekor Systems
REKR
$84.6M
| $134K | ﹤0.01% |
114,100
+61,300
| +116% | +$90.1K |
|
4933
PUT
Sana Biotechnology
SANA
$904M
| $134K | ﹤0.01% |
32,300
-52,800
| -62% | -$277K |
|
|
SRDX
4934
DELISTED
Surmodics
SRDX
| $134K | ﹤0.01% |
3,466
+3,445
| +16,405% | +$139K |
|
4935
Simplify Volatility Premium ETF
SVOL
$515M
| $134K | ﹤0.01% |
+6,137
| New | +$137K |
|
|
ONC
4936
PUT
BeOne Medicines Ltd
ONC
$33.4B
| $134K | ﹤0.01% |
600
-1,400
| -70% | -$252K |
|
4937
CALL
Diebold Nixdorf
DBD
$2.47B
| $133K | ﹤0.01% |
+3,000
| New | +$124K |
|
4938
PUT
Lloyds Banking Group
LYG
$90.7B
| $133K | ﹤0.01% |
42,700
-10,500
| -20% | -$31.5K |
|
4939
PUT
Navigator Holdings
NVGS
$1.37B
| $133K | ﹤0.01% |
8,300
-13,000
| -61% | -$212K |
|
4940
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.27B
| $133K | ﹤0.01% |
3,200
+2,900
| +967% | +$81K |
|
|
TWO
4941
CALL
Two Harbors Investment
TWO
$1.27B
| $133K | ﹤0.01% |
9,600
-13,000
| -58% | -$177K |
|
4942
CALL
Atour Lifestyle Holdings
ATAT
$4.66B
| $132K | ﹤0.01% |
+5,100
| New | +$94.8K |
|
|
LKFT
4943
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.81B
| $132K | ﹤0.01% |
4,600
+3,500
| +318% | +$95.3K |
|
|
SCPH
4944
CALL
DELISTED
scPharmaceuticals
SCPH
| $132K | ﹤0.01% |
29,100
-2,100
| -7% | -$10.2K |
|
|
FIRY
4945
CALL
Firy Inc
FIRY
$152M
| $132K | ﹤0.01% |
23,500
+900
| +4% | +$5.56K |
|
4946
CALL
STAG Industrial
STAG
$7.43B
| $132K | ﹤0.01% |
3,400
-100
| -3% | -$3.92K |
|
4947
Terex
TEX
$7.11B
| $132K | ﹤0.01% |
2,504
+2,127
| +564% | +$118K |
|
4948
PUT
Wheels Up
UP
$217M
| $132K | ﹤0.01% |
2,730
+2,550
| +1,417% | +$124K |
|
4949
CALL
Crescent Capital BDC
CCAP
$400M
| $131K | ﹤0.01% |
7,100
-5,700
| -45% | -$106K |
|
4950
PUT
Hudbay
HBM
$10.1B
| $131K | ﹤0.01% |
14,300
-6,300
| -31% | -$50.8K |
|
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.