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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
IAA
3201
DELISTED
IAA, Inc. Common Stock
IAA
| $626K | ﹤0.01% |
19,676
-22,685
| -54% | -$805K |
|
|
STOR
3202
PUT
DELISTED
STORE Capital Corporation
STOR
| $626K | ﹤0.01% |
20,000
+4,100
| +26% | +$116K |
|
3203
CALL
First Horizon
FHN
$12.3B
| $625K | ﹤0.01% |
27,300
+1,400
| +5% | +$31.8K |
|
|
BLDP
3204
CALL
Ballard Power Systems
BLDP
$808M
| $624K | ﹤0.01% |
102,000
+3,500
| +4% | +$26.2K |
|
3205
CALL
Herbalife
HLF
$1.3B
| $624K | ﹤0.01% |
31,400
+23,600
| +303% | +$584K |
|
3206
PUT
Northern Trust
NTRS
$22.2B
| $624K | ﹤0.01% |
7,300
+6,800
| +1,360% | +$656K |
|
3207
PUT
Bio-Techne
TECH
$11.2B
| $624K | ﹤0.01% |
8,800
+7,600
| +633% | +$657K |
|
3208
Sensus Healthcare
SRTS
$48.4M
| $623K | ﹤0.01% |
49,775
+23,015
| +86% | +$275K |
|
|
WIRE
3209
CALL
DELISTED
Encore Wire Corp
WIRE
| $623K | ﹤0.01% |
5,400
-1,100
| -17% | -$134K |
|
3210
CALL
Innoviz Technologies
INVZ
$99.5M
| $622K | ﹤0.01% |
119,500
-8,800
| -7% | -$42.2K |
|
3211
CALL
Agree Realty
ADC
$9.74B
| $621K | ﹤0.01% |
9,200
-2,400
| -21% | -$180K |
|
|
AGNT
3212
CALL
AGNT Inc
AGNT
$661M
| $621K | ﹤0.01% |
55,400
+27,500
| +99% | +$383K |
|
3213
PUT
YPF
YPF
$19.5B
| $621K | ﹤0.01% |
100,100
-244,500
| -71% | -$1.17M |
|
3214
CALL
Jacobs Solutions
J
$16.6B
| $618K | ﹤0.01% |
6,891
+3,264
| +90% | +$338K |
|
3215
PUT
Revolve Group
RVLV
$1.92B
| $618K | ﹤0.01% |
28,500
-27,200
| -49% | -$716K |
|
3216
PUT
Monolithic Power Systems
MPWR
$63B
| $617K | ﹤0.01% |
1,700
-6,800
| -80% | -$3.02M |
|
3217
PUT
Voya Financial
VOYA
$9.07B
| $617K | ﹤0.01% |
10,200
-38,100
| -79% | -$2.33M |
|
3218
CALL
W&T Offshore
WTI
$473M
| $617K | ﹤0.01% |
105,300
+58,400
| +125% | +$319K |
|
|
RAD
3219
PUT
DELISTED
Rite Aid Corporation
RAD
| $617K | ﹤0.01% |
124,800
-43,700
| -26% | -$339K |
|
|
GLOP
3220
PUT
DELISTED
GASLOG PARTNERS LP
GLOP
| $617K | ﹤0.01% |
119,600
+30,300
| +34% | +$172K |
|
3221
CALL
Planet Fitness
PLNT
$4.43B
| $616K | ﹤0.01% |
10,700
-17,200
| -62% | -$1.24M |
|
3222
PUT
Unum
UNM
$14B
| $616K | ﹤0.01% |
15,900
-24,500
| -61% | -$896K |
|
3223
CALL
Kodak
KODK
$812M
| $615K | ﹤0.01% |
134,100
+31,400
| +31% | +$171K |
|
3224
PUT
West Pharmaceutical
WST
$23.7B
| $615K | ﹤0.01% |
2,500
+2,200
| +733% | +$670K |
|
3225
CALL
IonQ
IONQ
$12.6B
| $614K | ﹤0.01% |
121,200
-17,600
| -13% | -$97.6K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.